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thinkphp/library/think/model/relation/BelongsTo.php

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+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\db\Query;
+use think\Loader;
+use think\Model;
+
+class BelongsTo extends OneToOne
+{
+    /**
+     * 构造函数
+     * @access public
+     * @param Model  $parent 上级模型对象
+     * @param string $model 模型名
+     * @param string $foreignKey 关联外键
+     * @param string $localKey 关联主键
+     * @param string $joinType JOIN类型
+     * @param string $relation  关联名
+     */
+    public function __construct(Model $parent, $model, $foreignKey, $localKey, $joinType = 'INNER', $relation = null)
+    {
+        $this->parent     = $parent;
+        $this->model      = $model;
+        $this->foreignKey = $foreignKey;
+        $this->localKey   = $localKey;
+        $this->joinType   = $joinType;
+        $this->query      = (new $model)->db();
+        $this->relation   = $relation;
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @access public
+     * @return array|false|\PDOStatement|string|Model
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        $foreignKey = $this->foreignKey;
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+        $relationModel = $this->query
+            ->where($this->localKey, $this->parent->$foreignKey)
+            ->relation($subRelation)
+            ->find();
+
+        if ($relationModel) {
+            $relationModel->setParent(clone $this->parent);
+        }
+
+        return $relationModel;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param string  $operator 比较操作符
+     * @param integer $count    个数
+     * @param string  $id       关联表的统计字段
+     * @return Query
+     */
+    public function has($operator = '>=', $count = 1, $id = '*')
+    {
+        return $this->parent;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     */
+    public function hasWhere($where = [])
+    {
+        $table    = $this->query->getTable();
+        $model    = basename(str_replace('\\', '/', get_class($this->parent)));
+        $relation = basename(str_replace('\\', '/', $this->model));
+        if (is_array($where)) {
+            foreach ($where as $key => $val) {
+                if (false === strpos($key, '.')) {
+                    $where[$relation . '.' . $key] = $val;
+                    unset($where[$key]);
+                }
+            }
+        }
+        return $this->parent->db()->alias($model)
+            ->field($model . '.*')
+            ->join($table . ' ' . $relation, $model . '.' . $this->foreignKey . '=' . $relation . '.' . $this->localKey, $this->joinType)
+            ->where($where);
+    }
+
+    /**
+     * 预载入关联查询（数据集）
+     * @access public
+     * @param array     $resultSet 数据集
+     * @param string    $relation 当前关联名
+     * @param string    $subRelation 子关联名
+     * @param \Closure  $closure 闭包
+     * @return void
+     */
+    protected function eagerlySet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        $localKey   = $this->localKey;
+        $foreignKey = $this->foreignKey;
+
+        $range = [];
+        foreach ($resultSet as $result) {
+            // 获取关联外键列表
+            if (isset($result->$foreignKey)) {
+                $range[] = $result->$foreignKey;
+            }
+        }
+
+        if (!empty($range)) {
+            $data = $this->eagerlyWhere($this, [
+                $localKey => [
+                    'in',
+                    $range,
+                ],
+            ], $localKey, $relation, $subRelation, $closure);
+            // 关联属性名
+            $attr = Loader::parseName($relation);
+            // 关联数据封装
+            foreach ($resultSet as $result) {
+                // 关联模型
+                if (!isset($data[$result->$foreignKey])) {
+                    $relationModel = null;
+                } else {
+                    $relationModel = $data[$result->$foreignKey];
+                    $relationModel->setParent(clone $result);
+                    $relationModel->isUpdate(true);
+                }
+
+                if (!empty($this->bindAttr)) {
+                    // 绑定关联属性
+                    $this->bindAttr($relationModel, $result, $this->bindAttr);
+                } else {
+                    // 设置关联属性
+                    $result->setRelation($attr, $relationModel);
+                }
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询（数据）
+     * @access public
+     * @param Model     $result 数据对象
+     * @param string    $relation 当前关联名
+     * @param string    $subRelation 子关联名
+     * @param \Closure  $closure 闭包
+     * @return void
+     */
+    protected function eagerlyOne(&$result, $relation, $subRelation, $closure)
+    {
+        $localKey   = $this->localKey;
+        $foreignKey = $this->foreignKey;
+        $data       = $this->eagerlyWhere($this, [$localKey => $result->$foreignKey], $localKey, $relation, $subRelation, $closure);
+        // 关联模型
+        if (!isset($data[$result->$foreignKey])) {
+            $relationModel = null;
+        } else {
+            $relationModel = $data[$result->$foreignKey];
+            $relationModel->setParent(clone $result);
+            $relationModel->isUpdate(true);
+        }
+        if (!empty($this->bindAttr)) {
+            // 绑定关联属性
+            $this->bindAttr($relationModel, $result, $this->bindAttr);
+        } else {
+            // 设置关联属性
+            $result->setRelation(Loader::parseName($relation), $relationModel);
+        }
+    }
+
+    /**
+     * 添加关联数据
+     * @access public
+     * @param Model $model       关联模型对象
+     * @return Model
+     */
+    public function associate($model)
+    {
+        $foreignKey = $this->foreignKey;
+        $pk         = $model->getPk();
+
+        $this->parent->setAttr($foreignKey, $model->$pk);
+        $this->parent->save();
+
+        return $this->parent->setRelation($this->relation, $model);
+    }
+
+    /**
+     * 注销关联数据
+     * @access public
+     * @return Model
+     */
+    public function dissociate()
+    {
+        $foreignKey = $this->foreignKey;
+
+        $this->parent->setAttr($foreignKey, null);
+        $this->parent->save();
+
+        return $this->parent->setRelation($this->relation, null);
+    }
+}

thinkphp/library/think/model/relation/BelongsToMany.php

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+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\Collection;
+use think\db\Query;
+use think\Exception;
+use think\Loader;
+use think\Model;
+use think\model\Pivot;
+use think\model\Relation;
+use think\Paginator;
+
+class BelongsToMany extends Relation
+{
+    // 中间表表名
+    protected $middle;
+    // 中间表模型名称
+    protected $pivotName;
+    // 中间表模型对象
+    protected $pivot;
+
+    /**
+     * 构造函数
+     * @access public
+     * @param Model  $parent     上级模型对象
+     * @param string $model      模型名
+     * @param string $table      中间表名
+     * @param string $foreignKey 关联模型外键
+     * @param string $localKey   当前模型关联键
+     */
+    public function __construct(Model $parent, $model, $table, $foreignKey, $localKey)
+    {
+        $this->parent     = $parent;
+        $this->model      = $model;
+        $this->foreignKey = $foreignKey;
+        $this->localKey   = $localKey;
+        if (false !== strpos($table, '\\')) {
+            $this->pivotName = $table;
+            $this->middle    = basename(str_replace('\\', '/', $table));
+        } else {
+            $this->middle = $table;
+        }
+        $this->query = (new $model)->db();
+        $this->pivot = $this->newPivot();
+    }
+
+    /**
+     * 设置中间表模型
+     * @param $pivot
+     * @return $this
+     */
+    public function pivot($pivot)
+    {
+        $this->pivotName = $pivot;
+        return $this;
+    }
+
+    /**
+     * 实例化中间表模型
+     * @param $data
+     * @return Pivot
+     * @throws Exception
+     */
+    protected function newPivot($data = [])
+    {
+        $class = $this->pivotName ?: '\\think\\model\\Pivot';
+        $pivot = new $class($this->parent, $data, $this->middle);
+        if ($pivot instanceof Pivot) {
+            return $pivot;
+        } else {
+            throw new Exception('pivot model must extends: \think\model\Pivot');
+        }
+    }
+
+    /**
+     * 合成中间表模型
+     * @param array|Collection|Paginator $models
+     */
+    protected function hydratePivot($models)
+    {
+        foreach ($models as $model) {
+            $pivot = [];
+            foreach ($model->getData() as $key => $val) {
+                if (strpos($key, '__')) {
+                    list($name, $attr) = explode('__', $key, 2);
+                    if ('pivot' == $name) {
+                        $pivot[$attr] = $val;
+                        unset($model->$key);
+                    }
+                }
+            }
+            $model->setRelation('pivot', $this->newPivot($pivot));
+        }
+    }
+
+    /**
+     * 创建关联查询Query对象
+     * @return Query
+     */
+    protected function buildQuery()
+    {
+        $foreignKey = $this->foreignKey;
+        $localKey   = $this->localKey;
+        $pk         = $this->parent->getPk();
+        // 关联查询
+        $condition['pivot.' . $localKey] = $this->parent->$pk;
+        return $this->belongsToManyQuery($foreignKey, $localKey, $condition);
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @return false|\PDOStatement|string|\think\Collection
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+        $result = $this->buildQuery()->relation($subRelation)->select();
+        $this->hydratePivot($result);
+        return $result;
+    }
+
+    /**
+     * 重载select方法
+     * @param null $data
+     * @return false|\PDOStatement|string|Collection
+     */
+    public function select($data = null)
+    {
+        $result = $this->buildQuery()->select($data);
+        $this->hydratePivot($result);
+        return $result;
+    }
+
+    /**
+     * 重载paginate方法
+     * @param null  $listRows
+     * @param bool  $simple
+     * @param array $config
+     * @return Paginator
+     */
+    public function paginate($listRows = null, $simple = false, $config = [])
+    {
+        $result = $this->buildQuery()->paginate($listRows, $simple, $config);
+        $this->hydratePivot($result);
+        return $result;
+    }
+
+    /**
+     * 重载find方法
+     * @param null $data
+     * @return array|false|\PDOStatement|string|Model
+     */
+    public function find($data = null)
+    {
+        $result = $this->buildQuery()->find($data);
+        if ($result) {
+            $this->hydratePivot([$result]);
+        }
+        return $result;
+    }
+
+    /**
+     * 查找多条记录 如果不存在则抛出异常
+     * @access public
+     * @param array|string|Query|\Closure $data
+     * @return array|\PDOStatement|string|Model
+     */
+    public function selectOrFail($data = null)
+    {
+        return $this->failException(true)->select($data);
+    }
+
+    /**
+     * 查找单条记录 如果不存在则抛出异常
+     * @access public
+     * @param array|string|Query|\Closure $data
+     * @return array|\PDOStatement|string|Model
+     */
+    public function findOrFail($data = null)
+    {
+        return $this->failException(true)->find($data);
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param string  $operator 比较操作符
+     * @param integer $count    个数
+     * @param string  $id       关联表的统计字段
+     * @param string  $joinType JOIN类型
+     * @return Query
+     */
+    public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
+    {
+        return $this->parent;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     * @throws Exception
+     */
+    public function hasWhere($where = [])
+    {
+        throw new Exception('relation not support: hasWhere');
+    }
+
+    /**
+     * 设置中间表的查询条件
+     * @param      $field
+     * @param null $op
+     * @param null $condition
+     * @return $this
+     */
+    public function wherePivot($field, $op = null, $condition = null)
+    {
+        $field = 'pivot.' . $field;
+        $this->query->where($field, $op, $condition);
+        return $this;
+    }
+
+    /**
+     * 预载入关联查询（数据集）
+     * @access public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        $localKey   = $this->localKey;
+        $foreignKey = $this->foreignKey;
+
+        $pk    = $resultSet[0]->getPk();
+        $range = [];
+        foreach ($resultSet as $result) {
+            // 获取关联外键列表
+            if (isset($result->$pk)) {
+                $range[] = $result->$pk;
+            }
+        }
+
+        if (!empty($range)) {
+            // 查询关联数据
+            $data = $this->eagerlyManyToMany([
+                'pivot.' . $localKey => [
+                    'in',
+                    $range,
+                ],
+            ], $relation, $subRelation);
+            // 关联属性名
+            $attr = Loader::parseName($relation);
+            // 关联数据封装
+            foreach ($resultSet as $result) {
+                if (!isset($data[$result->$pk])) {
+                    $data[$result->$pk] = [];
+                }
+
+                $result->setRelation($attr, $this->resultSetBuild($data[$result->$pk]));
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询（单个数据）
+     * @access public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResult(&$result, $relation, $subRelation, $closure)
+    {
+        $pk = $result->getPk();
+        if (isset($result->$pk)) {
+            $pk = $result->$pk;
+            // 查询管理数据
+            $data = $this->eagerlyManyToMany(['pivot.' . $this->localKey => $pk], $relation, $subRelation);
+
+            // 关联数据封装
+            if (!isset($data[$pk])) {
+                $data[$pk] = [];
+            }
+            $result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$pk]));
+        }
+    }
+
+    /**
+     * 关联统计
+     * @access public
+     * @param Model    $result  数据对象
+     * @param \Closure $closure 闭包
+     * @return integer
+     */
+    public function relationCount($result, $closure)
+    {
+        $pk    = $result->getPk();
+        $count = 0;
+        if (isset($result->$pk)) {
+            $pk    = $result->$pk;
+            $count = $this->belongsToManyQuery($this->foreignKey, $this->localKey, ['pivot.' . $this->localKey => $pk])->count();
+        }
+        return $count;
+    }
+
+    /**
+     * 获取关联统计子查询
+     * @access public
+     * @param \Closure $closure 闭包
+     * @return string
+     */
+    public function getRelationCountQuery($closure)
+    {
+        return $this->belongsToManyQuery($this->foreignKey, $this->localKey, [
+            'pivot.' . $this->localKey => [
+                'exp',
+                '=' . $this->parent->getTable() . '.' . $this->parent->getPk(),
+            ],
+        ])->fetchSql()->count();
+    }
+
+    /**
+     * 多对多 关联模型预查询
+     * @access public
+     * @param array  $where       关联预查询条件
+     * @param string $relation    关联名
+     * @param string $subRelation 子关联
+     * @return array
+     */
+    protected function eagerlyManyToMany($where, $relation, $subRelation = '')
+    {
+        // 预载入关联查询 支持嵌套预载入
+        $list = $this->belongsToManyQuery($this->foreignKey, $this->localKey, $where)->with($subRelation)->select();
+
+        // 组装模型数据
+        $data = [];
+        foreach ($list as $set) {
+            $pivot = [];
+            foreach ($set->getData() as $key => $val) {
+                if (strpos($key, '__')) {
+                    list($name, $attr) = explode('__', $key, 2);
+                    if ('pivot' == $name) {
+                        $pivot[$attr] = $val;
+                        unset($set->$key);
+                    }
+                }
+            }
+            $set->setRelation('pivot', $this->newPivot($pivot));
+            $data[$pivot[$this->localKey]][] = $set;
+        }
+        return $data;
+    }
+
+    /**
+     * BELONGS TO MANY 关联查询
+     * @access public
+     * @param string $foreignKey 关联模型关联键
+     * @param string $localKey   当前模型关联键
+     * @param array  $condition  关联查询条件
+     * @return Query
+     */
+    protected function belongsToManyQuery($foreignKey, $localKey, $condition = [])
+    {
+        // 关联查询封装
+        $tableName = $this->query->getTable();
+        $table     = $this->pivot->getTable();
+        $fields    = $this->getQueryFields($tableName);
+
+        $query = $this->query->field($fields)
+            ->field(true, false, $table, 'pivot', 'pivot__');
+
+        if (empty($this->baseQuery)) {
+            $relationFk = $this->query->getPk();
+            $query->join($table . ' pivot', 'pivot.' . $foreignKey . '=' . $tableName . '.' . $relationFk)
+                ->where($condition);
+        }
+        return $query;
+    }
+
+    /**
+     * 保存（新增）当前关联数据对象
+     * @access public
+     * @param mixed $data  数据 可以使用数组 关联模型对象 和 关联对象的主键
+     * @param array $pivot 中间表额外数据
+     * @return integer
+     */
+    public function save($data, array $pivot = [])
+    {
+        // 保存关联表/中间表数据
+        return $this->attach($data, $pivot);
+    }
+
+    /**
+     * 批量保存当前关联数据对象
+     * @access public
+     * @param array $dataSet   数据集
+     * @param array $pivot     中间表额外数据
+     * @param bool  $samePivot 额外数据是否相同
+     * @return integer
+     */
+    public function saveAll(array $dataSet, array $pivot = [], $samePivot = false)
+    {
+        $result = false;
+        foreach ($dataSet as $key => $data) {
+            if (!$samePivot) {
+                $pivotData = isset($pivot[$key]) ? $pivot[$key] : [];
+            } else {
+                $pivotData = $pivot;
+            }
+            $result = $this->attach($data, $pivotData);
+        }
+        return $result;
+    }
+
+    /**
+     * 附加关联的一个中间表数据
+     * @access public
+     * @param mixed $data  数据 可以使用数组、关联模型对象 或者 关联对象的主键
+     * @param array $pivot 中间表额外数据
+     * @return array|Pivot
+     * @throws Exception
+     */
+    public function attach($data, $pivot = [])
+    {
+        if (is_array($data)) {
+            if (key($data) === 0) {
+                $id = $data;
+            } else {
+                // 保存关联表数据
+                $model = new $this->model;
+                $model->save($data);
+                $id = $model->getLastInsID();
+            }
+        } elseif (is_numeric($data) || is_string($data)) {
+            // 根据关联表主键直接写入中间表
+            $id = $data;
+        } elseif ($data instanceof Model) {
+            // 根据关联表主键直接写入中间表
+            $relationFk = $data->getPk();
+            $id         = $data->$relationFk;
+        }
+
+        if ($id) {
+            // 保存中间表数据
+            $pk                     = $this->parent->getPk();
+            $pivot[$this->localKey] = $this->parent->$pk;
+            $ids                    = (array) $id;
+            foreach ($ids as $id) {
+                $pivot[$this->foreignKey] = $id;
+                $this->pivot->insert($pivot, true);
+                $result[] = $this->newPivot($pivot);
+            }
+            if (count($result) == 1) {
+                // 返回中间表模型对象
+                $result = $result[0];
+            }
+            return $result;
+        } else {
+            throw new Exception('miss relation data');
+        }
+    }
+
+    /**
+     * 解除关联的一个中间表数据
+     * @access public
+     * @param integer|array $data        数据 可以使用关联对象的主键
+     * @param bool          $relationDel 是否同时删除关联表数据
+     * @return integer
+     */
+    public function detach($data = null, $relationDel = false)
+    {
+        if (is_array($data)) {
+            $id = $data;
+        } elseif (is_numeric($data) || is_string($data)) {
+            // 根据关联表主键直接写入中间表
+            $id = $data;
+        } elseif ($data instanceof Model) {
+            // 根据关联表主键直接写入中间表
+            $relationFk = $data->getPk();
+            $id         = $data->$relationFk;
+        }
+        // 删除中间表数据
+        $pk                     = $this->parent->getPk();
+        $pivot[$this->localKey] = $this->parent->$pk;
+        if (isset($id)) {
+            $pivot[$this->foreignKey] = is_array($id) ? ['in', $id] : $id;
+        }
+        $this->pivot->where($pivot)->delete();
+        // 删除关联表数据
+        if (isset($id) && $relationDel) {
+            $model = $this->model;
+            $model::destroy($id);
+        }
+    }
+
+    /**
+     * 数据同步
+     * @param array $ids
+     * @param bool  $detaching
+     * @return array
+     */
+    public function sync($ids, $detaching = true)
+    {
+        $changes = [
+            'attached' => [],
+            'detached' => [],
+            'updated'  => [],
+        ];
+        $pk      = $this->parent->getPk();
+        $current = $this->pivot->where($this->localKey, $this->parent->$pk)
+            ->column($this->foreignKey);
+        $records = [];
+
+        foreach ($ids as $key => $value) {
+            if (!is_array($value)) {
+                $records[$value] = [];
+            } else {
+                $records[$key] = $value;
+            }
+        }
+
+        $detach = array_diff($current, array_keys($records));
+
+        if ($detaching && count($detach) > 0) {
+            $this->detach($detach);
+
+            $changes['detached'] = $detach;
+        }
+
+        foreach ($records as $id => $attributes) {
+            if (!in_array($id, $current)) {
+                $this->attach($id, $attributes);
+                $changes['attached'][] = $id;
+            } elseif (count($attributes) > 0 &&
+                $this->attach($id, $attributes)
+            ) {
+                $changes['updated'][] = $id;
+            }
+        }
+
+        return $changes;
+
+    }
+
+    /**
+     * 执行基础查询（进执行一次）
+     * @access protected
+     * @return void
+     */
+    protected function baseQuery()
+    {
+        if (empty($this->baseQuery) && $this->parent->getData()) {
+            $pk    = $this->parent->getPk();
+            $table = $this->pivot->getTable();
+            $this->query->join($table . ' pivot', 'pivot.' . $this->foreignKey . '=' . $this->query->getTable() . '.' . $this->query->getPk())->where('pivot.' . $this->localKey, $this->parent->$pk);
+            $this->baseQuery = true;
+        }
+    }
+
+}

thinkphp/library/think/model/relation/HasMany.php

@@ -0,0 +1,294 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\db\Query;
+use think\Loader;
+use think\Model;
+use think\model\Relation;
+
+class HasMany extends Relation
+{
+    /**
+     * 构造函数
+     * @access public
+     * @param Model  $parent     上级模型对象
+     * @param string $model      模型名
+     * @param string $foreignKey 关联外键
+     * @param string $localKey   当前模型主键
+     */
+    public function __construct(Model $parent, $model, $foreignKey, $localKey)
+    {
+        $this->parent     = $parent;
+        $this->model      = $model;
+        $this->foreignKey = $foreignKey;
+        $this->localKey   = $localKey;
+        $this->query      = (new $model)->db();
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @return false|\PDOStatement|string|\think\Collection
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+        $list   = $this->relation($subRelation)->select();
+        $parent = clone $this->parent;
+
+        foreach ($list as &$model) {
+            $model->setParent($parent);
+        }
+
+        return $list;
+    }
+
+    /**
+     * 预载入关联查询
+     * @access   public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        $localKey = $this->localKey;
+        $range    = [];
+        foreach ($resultSet as $result) {
+            // 获取关联外键列表
+            if (isset($result->$localKey)) {
+                $range[] = $result->$localKey;
+            }
+        }
+
+        if (!empty($range)) {
+            $data = $this->eagerlyOneToMany(new $this->model, [
+                $this->foreignKey => [
+                    'in',
+                    $range,
+                ],
+            ], $relation, $subRelation, $closure);
+            // 关联属性名
+            $attr = Loader::parseName($relation);
+            // 关联数据封装
+            foreach ($resultSet as $result) {
+                if (!isset($data[$result->$localKey])) {
+                    $data[$result->$localKey] = [];
+                }
+
+                foreach ($data[$result->$localKey] as &$relationModel) {
+                    $relationModel->setParent(clone $result);
+                }
+
+                $result->setRelation($attr, $this->resultSetBuild($data[$result->$localKey]));
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询
+     * @access   public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResult(&$result, $relation, $subRelation, $closure)
+    {
+        $localKey = $this->localKey;
+
+        if (isset($result->$localKey)) {
+            $data = $this->eagerlyOneToMany(new $this->model, [$this->foreignKey => $result->$localKey], $relation, $subRelation, $closure);
+            // 关联数据封装
+            if (!isset($data[$result->$localKey])) {
+                $data[$result->$localKey] = [];
+            }
+
+            foreach ($data[$result->$localKey] as &$relationModel) {
+                $relationModel->setParent(clone $result);
+            }
+
+            $result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$result->$localKey]));
+        }
+    }
+
+    /**
+     * 关联统计
+     * @access public
+     * @param Model    $result  数据对象
+     * @param \Closure $closure 闭包
+     * @return integer
+     */
+    public function relationCount($result, $closure)
+    {
+        $localKey = $this->localKey;
+        $count    = 0;
+        if (isset($result->$localKey)) {
+            if ($closure) {
+                call_user_func_array($closure, [ & $this->query]);
+            }
+            $count = $this->query->where([$this->foreignKey => $result->$localKey])->count();
+        }
+        return $count;
+    }
+
+    /**
+     * 创建关联统计子查询
+     * @access public
+     * @param \Closure $closure 闭包
+     * @return string
+     */
+    public function getRelationCountQuery($closure)
+    {
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+        $localKey = $this->localKey ?: $this->parent->getPk();
+        return $this->query->where([
+            $this->foreignKey => [
+                'exp',
+                '=' . $this->parent->getTable() . '.' . $localKey,
+            ],
+        ])->fetchSql()->count();
+    }
+
+    /**
+     * 一对多 关联模型预查询
+     * @access public
+     * @param object $model       关联模型对象
+     * @param array  $where       关联预查询条件
+     * @param string $relation    关联名
+     * @param string $subRelation 子关联
+     * @param bool   $closure
+     * @return array
+     */
+    protected function eagerlyOneToMany($model, $where, $relation, $subRelation = '', $closure = false)
+    {
+        $foreignKey = $this->foreignKey;
+        // 预载入关联查询 支持嵌套预载入
+        if ($closure) {
+            call_user_func_array($closure, [ & $model]);
+        }
+        $list = $model->where($where)->with($subRelation)->select();
+
+        // 组装模型数据
+        $data = [];
+        foreach ($list as $set) {
+            $data[$set->$foreignKey][] = $set;
+        }
+        return $data;
+    }
+
+    /**
+     * 保存（新增）当前关联数据对象
+     * @access public
+     * @param mixed $data 数据 可以使用数组 关联模型对象 和 关联对象的主键
+     * @return Model|false
+     */
+    public function save($data)
+    {
+        if ($data instanceof Model) {
+            $data = $data->getData();
+        }
+        // 保存关联表数据
+        $model                   = new $this->model;
+        $data[$this->foreignKey] = $this->parent->{$this->localKey};
+        return $model->save($data) ? $model : false;
+    }
+
+    /**
+     * 批量保存当前关联数据对象
+     * @access public
+     * @param array $dataSet 数据集
+     * @return integer
+     */
+    public function saveAll(array $dataSet)
+    {
+        $result = false;
+        foreach ($dataSet as $key => $data) {
+            $result = $this->save($data);
+        }
+        return $result;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param string  $operator 比较操作符
+     * @param integer $count    个数
+     * @param string  $id       关联表的统计字段
+     * @param string  $joinType JOIN类型
+     * @return Query
+     */
+    public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
+    {
+        $table    = $this->query->getTable();
+        $model    = basename(str_replace('\\', '/', get_class($this->parent)));
+        $relation = basename(str_replace('\\', '/', $this->model));
+
+        return $this->parent->db()
+            ->alias($model)
+            ->field($model . '.*')
+            ->join($table . ' ' . $relation, $model . '.' . $this->localKey . '=' . $relation . '.' . $this->foreignKey, $joinType)
+            ->group($relation . '.' . $this->foreignKey)
+            ->having('count(' . $id . ')' . $operator . $count);
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     */
+    public function hasWhere($where = [])
+    {
+        $table    = $this->query->getTable();
+        $model    = basename(str_replace('\\', '/', get_class($this->parent)));
+        $relation = basename(str_replace('\\', '/', $this->model));
+        if (is_array($where)) {
+            foreach ($where as $key => $val) {
+                if (false === strpos($key, '.')) {
+                    $where[$relation . '.' . $key] = $val;
+                    unset($where[$key]);
+                }
+            }
+        }
+        return $this->parent->db()->alias($model)
+            ->field($model . '.*')
+            ->join($table . ' ' . $relation, $model . '.' . $this->localKey . '=' . $relation . '.' . $this->foreignKey)
+            ->where($where);
+    }
+
+    /**
+     * 执行基础查询（进执行一次）
+     * @access protected
+     * @return void
+     */
+    protected function baseQuery()
+    {
+        if (empty($this->baseQuery)) {
+            if (isset($this->parent->{$this->localKey})) {
+                // 关联查询带入关联条件
+                $this->query->where($this->foreignKey, $this->parent->{$this->localKey});
+            }
+            $this->baseQuery = true;
+        }
+    }
+
+}

thinkphp/library/think/model/relation/HasManyThrough.php

@@ -0,0 +1,144 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\db\Query;
+use think\Exception;
+use think\Loader;
+use think\Model;
+use think\model\Relation;
+
+class HasManyThrough extends Relation
+{
+    // 中间关联表外键
+    protected $throughKey;
+    // 中间表模型
+    protected $through;
+
+    /**
+     * 构造函数
+     * @access   public
+     * @param Model  $parent     上级模型对象
+     * @param string $model      模型名
+     * @param string $through    中间模型名
+     * @param string $foreignKey 关联外键
+     * @param string $throughKey 关联外键
+     * @param string $localKey   关联主键
+     */
+    public function __construct(Model $parent, $model, $through, $foreignKey, $throughKey, $localKey)
+    {
+        $this->parent     = $parent;
+        $this->model      = $model;
+        $this->through    = $through;
+        $this->foreignKey = $foreignKey;
+        $this->throughKey = $throughKey;
+        $this->localKey   = $localKey;
+        $this->query      = (new $model)->db();
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @return false|\PDOStatement|string|\think\Collection
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+
+        return $this->relation($subRelation)->select();
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param string  $operator 比较操作符
+     * @param integer $count    个数
+     * @param string  $id       关联表的统计字段
+     * @param string  $joinType JOIN类型
+     * @return Query
+     */
+    public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
+    {
+        return $this->parent;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     */
+    public function hasWhere($where = [])
+    {
+        throw new Exception('relation not support: hasWhere');
+    }
+
+    /**
+     * 预载入关联查询
+     * @access public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
+    {}
+
+    /**
+     * 预载入关联查询 返回模型对象
+     * @access public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResult(&$result, $relation, $subRelation, $closure)
+    {}
+
+    /**
+     * 关联统计
+     * @access public
+     * @param Model    $result  数据对象
+     * @param \Closure $closure 闭包
+     * @return integer
+     */
+    public function relationCount($result, $closure)
+    {}
+
+    /**
+     * 执行基础查询（进执行一次）
+     * @access protected
+     * @return void
+     */
+    protected function baseQuery()
+    {
+        if (empty($this->baseQuery) && $this->parent->getData()) {
+            $through      = $this->through;
+            $alias        = Loader::parseName(basename(str_replace('\\', '/', $this->model)));
+            $throughTable = $through::getTable();
+            $pk           = (new $through)->getPk();
+            $throughKey   = $this->throughKey;
+            $modelTable   = $this->parent->getTable();
+            $this->query->field($alias . '.*')->alias($alias)
+                ->join($throughTable, $throughTable . '.' . $pk . '=' . $alias . '.' . $throughKey)
+                ->join($modelTable, $modelTable . '.' . $this->localKey . '=' . $throughTable . '.' . $this->foreignKey)
+                ->where($throughTable . '.' . $this->foreignKey, $this->parent->{$this->localKey});
+            $this->baseQuery = true;
+        }
+    }
+
+}

thinkphp/library/think/model/relation/HasOne.php

@@ -0,0 +1,189 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\db\Query;
+use think\Loader;
+use think\Model;
+
+class HasOne extends OneToOne
+{
+    /**
+     * 构造函数
+     * @access public
+     * @param Model  $parent     上级模型对象
+     * @param string $model      模型名
+     * @param string $foreignKey 关联外键
+     * @param string $localKey   当前模型主键
+     * @param string $joinType   JOIN类型
+     */
+    public function __construct(Model $parent, $model, $foreignKey, $localKey, $joinType = 'INNER')
+    {
+        $this->parent     = $parent;
+        $this->model      = $model;
+        $this->foreignKey = $foreignKey;
+        $this->localKey   = $localKey;
+        $this->joinType   = $joinType;
+        $this->query      = (new $model)->db();
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @return array|false|\PDOStatement|string|Model
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        // 执行关联定义方法
+        $localKey = $this->localKey;
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+        // 判断关联类型执行查询
+        $relationModel = $this->query->where($this->foreignKey, $this->parent->$localKey)->relation($subRelation)->find();
+
+        if ($relationModel) {
+            $relationModel->setParent(clone $this->parent);
+        }
+
+        return $relationModel;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @return Query
+     */
+    public function has()
+    {
+        $table      = $this->query->getTable();
+        $model      = basename(str_replace('\\', '/', get_class($this->parent)));
+        $relation   = basename(str_replace('\\', '/', $this->model));
+        $localKey   = $this->localKey;
+        $foreignKey = $this->foreignKey;
+        return $this->parent->db()
+            ->alias($model)
+            ->whereExists(function ($query) use ($table, $model, $relation, $localKey, $foreignKey) {
+                $query->table([$table => $relation])->field($relation . '.' . $foreignKey)->whereExp($model . '.' . $localKey, '=' . $relation . '.' . $foreignKey);
+            });
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     */
+    public function hasWhere($where = [])
+    {
+        $table    = $this->query->getTable();
+        $model    = basename(str_replace('\\', '/', get_class($this->parent)));
+        $relation = basename(str_replace('\\', '/', $this->model));
+        if (is_array($where)) {
+            foreach ($where as $key => $val) {
+                if (false === strpos($key, '.')) {
+                    $where[$relation . '.' . $key] = $val;
+                    unset($where[$key]);
+                }
+            }
+        }
+        return $this->parent->db()->alias($model)
+            ->field($model . '.*')
+            ->join($table . ' ' . $relation, $model . '.' . $this->localKey . '=' . $relation . '.' . $this->foreignKey, $this->joinType)
+            ->where($where);
+    }
+
+    /**
+     * 预载入关联查询（数据集）
+     * @access public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    protected function eagerlySet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        $localKey   = $this->localKey;
+        $foreignKey = $this->foreignKey;
+
+        $range = [];
+        foreach ($resultSet as $result) {
+            // 获取关联外键列表
+            if (isset($result->$localKey)) {
+                $range[] = $result->$localKey;
+            }
+        }
+
+        if (!empty($range)) {
+            $data = $this->eagerlyWhere($this, [
+                $foreignKey => [
+                    'in',
+                    $range,
+                ],
+            ], $foreignKey, $relation, $subRelation, $closure);
+            // 关联属性名
+            $attr = Loader::parseName($relation);
+            // 关联数据封装
+            foreach ($resultSet as $result) {
+                // 关联模型
+                if (!isset($data[$result->$localKey])) {
+                    $relationModel = null;
+                } else {
+                    $relationModel = $data[$result->$localKey];
+                    $relationModel->setParent(clone $result);
+                    $relationModel->isUpdate(true);
+                }
+                if (!empty($this->bindAttr)) {
+                    // 绑定关联属性
+                    $this->bindAttr($relationModel, $result, $this->bindAttr);
+                } else {
+                    // 设置关联属性
+                    $result->setRelation($attr, $relationModel);
+                }
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询（数据）
+     * @access public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    protected function eagerlyOne(&$result, $relation, $subRelation, $closure)
+    {
+        $localKey   = $this->localKey;
+        $foreignKey = $this->foreignKey;
+        $data       = $this->eagerlyWhere($this, [$foreignKey => $result->$localKey], $foreignKey, $relation, $subRelation, $closure);
+
+        // 关联模型
+        if (!isset($data[$result->$localKey])) {
+            $relationModel = null;
+        } else {
+            $relationModel = $data[$result->$localKey];
+            $relationModel->setParent(clone $result);
+            $relationModel->isUpdate(true);
+        }
+        if (!empty($this->bindAttr)) {
+            // 绑定关联属性
+            $this->bindAttr($relationModel, $result, $this->bindAttr);
+        } else {
+            $result->setRelation(Loader::parseName($relation), $relationModel);
+        }
+    }
+
+}

thinkphp/library/think/model/relation/MorphMany.php

@@ -0,0 +1,285 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\db\Query;
+use think\Exception;
+use think\Loader;
+use think\Model;
+use think\model\Relation;
+
+class MorphMany extends Relation
+{
+    // 多态字段
+    protected $morphKey;
+    protected $morphType;
+    // 多态类型
+    protected $type;
+
+    /**
+     * 构造函数
+     * @access public
+     * @param Model  $parent    上级模型对象
+     * @param string $model     模型名
+     * @param string $morphKey  关联外键
+     * @param string $morphType 多态字段名
+     * @param string $type      多态类型
+     */
+    public function __construct(Model $parent, $model, $morphKey, $morphType, $type)
+    {
+        $this->parent    = $parent;
+        $this->model     = $model;
+        $this->type      = $type;
+        $this->morphKey  = $morphKey;
+        $this->morphType = $morphType;
+        $this->query     = (new $model)->db();
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @return false|\PDOStatement|string|\think\Collection
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+        $list   = $this->relation($subRelation)->select();
+        $parent = clone $this->parent;
+
+        foreach ($list as &$model) {
+            $model->setParent($parent);
+        }
+
+        return $list;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param string  $operator 比较操作符
+     * @param integer $count    个数
+     * @param string  $id       关联表的统计字段
+     * @param string  $joinType JOIN类型
+     * @return Query
+     */
+    public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
+    {
+        throw new Exception('relation not support: has');
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     */
+    public function hasWhere($where = [])
+    {
+        throw new Exception('relation not support: hasWhere');
+    }
+
+    /**
+     * 预载入关联查询
+     * @access public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        $morphType = $this->morphType;
+        $morphKey  = $this->morphKey;
+        $type      = $this->type;
+        $range     = [];
+        foreach ($resultSet as $result) {
+            $pk = $result->getPk();
+            // 获取关联外键列表
+            if (isset($result->$pk)) {
+                $range[] = $result->$pk;
+            }
+        }
+
+        if (!empty($range)) {
+            $data = $this->eagerlyMorphToMany([
+                $morphKey  => ['in', $range],
+                $morphType => $type,
+            ], $relation, $subRelation, $closure);
+            // 关联属性名
+            $attr = Loader::parseName($relation);
+            // 关联数据封装
+            foreach ($resultSet as $result) {
+                if (!isset($data[$result->$pk])) {
+                    $data[$result->$pk] = [];
+                }
+                foreach ($data[$result->$pk] as &$relationModel) {
+                    $relationModel->setParent(clone $result);
+                    $relationModel->isUpdate(true);
+                }
+                $result->setRelation($attr, $this->resultSetBuild($data[$result->$pk]));
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询
+     * @access public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResult(&$result, $relation, $subRelation, $closure)
+    {
+        $pk = $result->getPk();
+        if (isset($result->$pk)) {
+            $data = $this->eagerlyMorphToMany([
+                $this->morphKey  => $result->$pk,
+                $this->morphType => $this->type,
+            ], $relation, $subRelation, $closure);
+
+            if (!isset($data[$result->$pk])) {
+                $data[$result->$pk] = [];
+            }
+
+            foreach ($data[$result->$pk] as &$relationModel) {
+                $relationModel->setParent(clone $result);
+                $relationModel->isUpdate(true);
+            }
+
+            $result->setRelation(Loader::parseName($relation), $this->resultSetBuild($data[$result->$pk]));
+        }
+    }
+
+    /**
+     * 关联统计
+     * @access public
+     * @param Model    $result  数据对象
+     * @param \Closure $closure 闭包
+     * @return integer
+     */
+    public function relationCount($result, $closure)
+    {
+        $pk    = $result->getPk();
+        $count = 0;
+        if (isset($result->$pk)) {
+            if ($closure) {
+                call_user_func_array($closure, [ & $this->query]);
+            }
+            $count = $this->query->where([$this->morphKey => $result->$pk, $this->morphType => $this->type])->count();
+        }
+        return $count;
+    }
+
+    /**
+     * 获取关联统计子查询
+     * @access public
+     * @param \Closure $closure 闭包
+     * @return string
+     */
+    public function getRelationCountQuery($closure)
+    {
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+
+        return $this->query->where([
+            $this->morphKey  => [
+                'exp',
+                '=' . $this->parent->getTable() . '.' . $this->parent->getPk(),
+            ],
+            $this->morphType => $this->type,
+        ])->fetchSql()->count();
+    }
+
+    /**
+     * 多态一对多 关联模型预查询
+     * @access   public
+     * @param array         $where       关联预查询条件
+     * @param string        $relation    关联名
+     * @param string        $subRelation 子关联
+     * @param bool|\Closure $closure     闭包
+     * @return array
+     */
+    protected function eagerlyMorphToMany($where, $relation, $subRelation = '', $closure = false)
+    {
+        // 预载入关联查询 支持嵌套预载入
+        if ($closure) {
+            call_user_func_array($closure, [ & $this]);
+        }
+        $list     = $this->query->where($where)->with($subRelation)->select();
+        $morphKey = $this->morphKey;
+        // 组装模型数据
+        $data = [];
+        foreach ($list as $set) {
+            $data[$set->$morphKey][] = $set;
+        }
+        return $data;
+    }
+
+    /**
+     * 保存（新增）当前关联数据对象
+     * @access public
+     * @param mixed $data 数据 可以使用数组 关联模型对象 和 关联对象的主键
+     * @return Model|false
+     */
+    public function save($data)
+    {
+        if ($data instanceof Model) {
+            $data = $data->getData();
+        }
+        // 保存关联表数据
+        $pk = $this->parent->getPk();
+
+        $model                  = new $this->model;
+        $data[$this->morphKey]  = $this->parent->$pk;
+        $data[$this->morphType] = $this->type;
+        return $model->save($data) ? $model : false;
+    }
+
+    /**
+     * 批量保存当前关联数据对象
+     * @access public
+     * @param array $dataSet 数据集
+     * @return integer
+     */
+    public function saveAll(array $dataSet)
+    {
+        $result = false;
+        foreach ($dataSet as $key => $data) {
+            $result = $this->save($data);
+        }
+        return $result;
+    }
+
+    /**
+     * 执行基础查询（进执行一次）
+     * @access protected
+     * @return void
+     */
+    protected function baseQuery()
+    {
+        if (empty($this->baseQuery) && $this->parent->getData()) {
+            $pk                    = $this->parent->getPk();
+            $map[$this->morphKey]  = $this->parent->$pk;
+            $map[$this->morphType] = $this->type;
+            $this->query->where($map);
+            $this->baseQuery = true;
+        }
+    }
+
+}

thinkphp/library/think/model/relation/MorphOne.php

@@ -0,0 +1,229 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\db\Query;
+use think\Exception;
+use think\Loader;
+use think\Model;
+use think\model\Relation;
+
+class MorphOne extends Relation
+{
+    // 多态字段
+    protected $morphKey;
+    protected $morphType;
+    // 多态类型
+    protected $type;
+
+    /**
+     * 构造函数
+     * @access public
+     * @param Model  $parent    上级模型对象
+     * @param string $model     模型名
+     * @param string $morphKey  关联外键
+     * @param string $morphType 多态字段名
+     * @param string $type      多态类型
+     */
+    public function __construct(Model $parent, $model, $morphKey, $morphType, $type)
+    {
+        $this->parent    = $parent;
+        $this->model     = $model;
+        $this->type      = $type;
+        $this->morphKey  = $morphKey;
+        $this->morphType = $morphType;
+        $this->query     = (new $model)->db();
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @return false|\PDOStatement|string|\think\Collection
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        if ($closure) {
+            call_user_func_array($closure, [ & $this->query]);
+        }
+        $relationModel = $this->relation($subRelation)->find();
+
+        if ($relationModel) {
+            $relationModel->setParent(clone $this->parent);
+        }
+
+        return $relationModel;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param string  $operator 比较操作符
+     * @param integer $count    个数
+     * @param string  $id       关联表的统计字段
+     * @param string  $joinType JOIN类型
+     * @return Query
+     */
+    public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
+    {
+        return $this->parent;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     */
+    public function hasWhere($where = [])
+    {
+        throw new Exception('relation not support: hasWhere');
+    }
+
+    /**
+     * 预载入关联查询
+     * @access public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        $morphType = $this->morphType;
+        $morphKey  = $this->morphKey;
+        $type      = $this->type;
+        $range     = [];
+        foreach ($resultSet as $result) {
+            $pk = $result->getPk();
+            // 获取关联外键列表
+            if (isset($result->$pk)) {
+                $range[] = $result->$pk;
+            }
+        }
+
+        if (!empty($range)) {
+            $data = $this->eagerlyMorphToOne([
+                $morphKey  => ['in', $range],
+                $morphType => $type,
+            ], $relation, $subRelation, $closure);
+            // 关联属性名
+            $attr = Loader::parseName($relation);
+            // 关联数据封装
+            foreach ($resultSet as $result) {
+                if (!isset($data[$result->$pk])) {
+                    $relationModel = null;
+                } else {
+                    $relationModel = $data[$result->$pk];
+                    $relationModel->setParent(clone $result);
+                    $relationModel->isUpdate(true);
+                }
+
+                $result->setRelation($attr, $relationModel);
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询
+     * @access public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResult(&$result, $relation, $subRelation, $closure)
+    {
+        $pk = $result->getPk();
+        if (isset($result->$pk)) {
+            $pk   = $result->$pk;
+            $data = $this->eagerlyMorphToOne([
+                $this->morphKey  => $pk,
+                $this->morphType => $this->type,
+            ], $relation, $subRelation, $closure);
+
+            if (isset($data[$pk])) {
+                $relationModel = $data[$pk];
+                $relationModel->setParent(clone $result);
+                $relationModel->isUpdate(true);
+            } else {
+                $relationModel = null;
+            }
+
+            $result->setRelation(Loader::parseName($relation), $relationModel);
+        }
+    }
+
+    /**
+     * 多态一对一 关联模型预查询
+     * @access   public
+     * @param array         $where       关联预查询条件
+     * @param string        $relation    关联名
+     * @param string        $subRelation 子关联
+     * @param bool|\Closure $closure     闭包
+     * @return array
+     */
+    protected function eagerlyMorphToOne($where, $relation, $subRelation = '', $closure = false)
+    {
+        // 预载入关联查询 支持嵌套预载入
+        if ($closure) {
+            call_user_func_array($closure, [ & $this]);
+        }
+        $list     = $this->query->where($where)->with($subRelation)->find();
+        $morphKey = $this->morphKey;
+        // 组装模型数据
+        $data = [];
+        foreach ($list as $set) {
+            $data[$set->$morphKey][] = $set;
+        }
+        return $data;
+    }
+
+    /**
+     * 保存（新增）当前关联数据对象
+     * @access public
+     * @param mixed $data 数据 可以使用数组 关联模型对象 和 关联对象的主键
+     * @return Model|false
+     */
+    public function save($data)
+    {
+        if ($data instanceof Model) {
+            $data = $data->getData();
+        }
+        // 保存关联表数据
+        $pk = $this->parent->getPk();
+
+        $model                  = new $this->model;
+        $data[$this->morphKey]  = $this->parent->$pk;
+        $data[$this->morphType] = $this->type;
+        return $model->save($data) ? $model : false;
+    }
+
+    /**
+     * 执行基础查询（进执行一次）
+     * @access protected
+     * @return void
+     */
+    protected function baseQuery()
+    {
+        if (empty($this->baseQuery) && $this->parent->getData()) {
+            $pk                    = $this->parent->getPk();
+            $map[$this->morphKey]  = $this->parent->$pk;
+            $map[$this->morphType] = $this->type;
+            $this->query->where($map);
+            $this->baseQuery = true;
+        }
+    }
+
+}

thinkphp/library/think/model/relation/MorphTo.php

@@ -0,0 +1,275 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\Exception;
+use think\Loader;
+use think\Model;
+use think\model\Relation;
+
+class MorphTo extends Relation
+{
+    // 多态字段
+    protected $morphKey;
+    protected $morphType;
+    // 多态别名
+    protected $alias;
+    protected $relation;
+
+    /**
+     * 构造函数
+     * @access public
+     * @param Model  $parent    上级模型对象
+     * @param string $morphType 多态字段名
+     * @param string $morphKey  外键名
+     * @param array  $alias     多态别名定义
+     * @param string $relation  关联名
+     */
+    public function __construct(Model $parent, $morphType, $morphKey, $alias = [], $relation = null)
+    {
+        $this->parent    = $parent;
+        $this->morphType = $morphType;
+        $this->morphKey  = $morphKey;
+        $this->alias     = $alias;
+        $this->relation  = $relation;
+    }
+
+    /**
+     * 延迟获取关联数据
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包查询条件
+     * @return mixed
+     */
+    public function getRelation($subRelation = '', $closure = null)
+    {
+        $morphKey  = $this->morphKey;
+        $morphType = $this->morphType;
+        // 多态模型
+        $model = $this->parseModel($this->parent->$morphType);
+        // 主键数据
+        $pk            = $this->parent->$morphKey;
+        $relationModel = (new $model)->relation($subRelation)->find($pk);
+
+        if ($relationModel) {
+            $relationModel->setParent(clone $this->parent);
+        }
+        return $relationModel;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param string  $operator 比较操作符
+     * @param integer $count    个数
+     * @param string  $id       关联表的统计字段
+     * @param string  $joinType JOIN类型
+     * @return Query
+     */
+    public function has($operator = '>=', $count = 1, $id = '*', $joinType = 'INNER')
+    {
+        return $this->parent;
+    }
+
+    /**
+     * 根据关联条件查询当前模型
+     * @access public
+     * @param mixed $where 查询条件（数组或者闭包）
+     * @return Query
+     */
+    public function hasWhere($where = [])
+    {
+        throw new Exception('relation not support: hasWhere');
+    }
+
+    /**
+     * 解析模型的完整命名空间
+     * @access public
+     * @param string $model 模型名（或者完整类名）
+     * @return string
+     */
+    protected function parseModel($model)
+    {
+        if (isset($this->alias[$model])) {
+            $model = $this->alias[$model];
+        }
+        if (false === strpos($model, '\\')) {
+            $path = explode('\\', get_class($this->parent));
+            array_pop($path);
+            array_push($path, Loader::parseName($model, 1));
+            $model = implode('\\', $path);
+        }
+        return $model;
+    }
+
+    /**
+     * 设置多态别名
+     * @access public
+     * @param array $alias 别名定义
+     * @return $this
+     */
+    public function setAlias($alias)
+    {
+        $this->alias = $alias;
+        return $this;
+    }
+
+    /**
+     * 移除关联查询参数
+     * @access public
+     * @return $this
+     */
+    public function removeOption()
+    {
+        return $this;
+    }
+
+    /**
+     * 预载入关联查询
+     * @access public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     * @throws Exception
+     */
+    public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        $morphKey  = $this->morphKey;
+        $morphType = $this->morphType;
+        $range     = [];
+        foreach ($resultSet as $result) {
+            // 获取关联外键列表
+            if (!empty($result->$morphKey)) {
+                $range[$result->$morphType][] = $result->$morphKey;
+            }
+        }
+
+        if (!empty($range)) {
+            // 关联属性名
+            $attr = Loader::parseName($relation);
+            foreach ($range as $key => $val) {
+                // 多态类型映射
+                $model = $this->parseModel($key);
+                $obj   = new $model;
+                $pk    = $obj->getPk();
+                $list  = $obj->all($val, $subRelation);
+                $data  = [];
+                foreach ($list as $k => $vo) {
+                    $data[$vo->$pk] = $vo;
+                }
+                foreach ($resultSet as $result) {
+                    if ($key == $result->$morphType) {
+                        // 关联模型
+                        if (!isset($data[$result->$morphKey])) {
+                            throw new Exception('relation data not exists :' . $this->model);
+                        } else {
+                            $relationModel = $data[$result->$morphKey];
+                            $relationModel->setParent(clone $result);
+                            $relationModel->isUpdate(true);
+
+                            $result->setRelation($attr, $relationModel);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询
+     * @access public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResult(&$result, $relation, $subRelation, $closure)
+    {
+        $morphKey  = $this->morphKey;
+        $morphType = $this->morphType;
+        // 多态类型映射
+        $model = $this->parseModel($result->{$this->morphType});
+        $this->eagerlyMorphToOne($model, $relation, $result, $subRelation);
+    }
+
+    /**
+     * 关联统计
+     * @access public
+     * @param Model    $result  数据对象
+     * @param \Closure $closure 闭包
+     * @return integer
+     */
+    public function relationCount($result, $closure)
+    {
+    }
+
+    /**
+     * 多态MorphTo 关联模型预查询
+     * @access   public
+     * @param object $model       关联模型对象
+     * @param string $relation    关联名
+     * @param        $result
+     * @param string $subRelation 子关联
+     * @return void
+     */
+    protected function eagerlyMorphToOne($model, $relation, &$result, $subRelation = '')
+    {
+        // 预载入关联查询 支持嵌套预载入
+        $pk   = $this->parent->{$this->morphKey};
+        $data = (new $model)->with($subRelation)->find($pk);
+        if ($data) {
+            $data->setParent(clone $result);
+            $data->isUpdate(true);
+        }
+        $result->setRelation(Loader::parseName($relation), $data ?: null);
+    }
+
+    /**
+     * 添加关联数据
+     * @access public
+     * @param Model     $model  关联模型对象
+     * @param string    $type   多态类型
+     * @return Model
+     */
+    public function associate($model, $type = '')
+    {
+        $morphKey  = $this->morphKey;
+        $morphType = $this->morphType;
+        $pk        = $model->getPk();
+
+        $this->parent->setAttr($morphKey, $model->$pk);
+        $this->parent->setAttr($morphType, $type ?: get_class($model));
+        $this->parent->save();
+
+        return $this->parent->setRelation($this->relation, $model);
+    }
+
+    /**
+     * 注销关联数据
+     * @access public
+     * @return Model
+     */
+    public function dissociate()
+    {
+        $morphKey  = $this->morphKey;
+        $morphType = $this->morphType;
+
+        $this->parent->setAttr($morphKey, null);
+        $this->parent->setAttr($morphType, null);
+        $this->parent->save();
+
+        return $this->parent->setRelation($this->relation, null);
+    }
+
+}

thinkphp/library/think/model/relation/OneToOne.php

@@ -0,0 +1,324 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\model\relation;
+
+use think\db\Query;
+use think\Exception;
+use think\Loader;
+use think\Model;
+use think\model\Relation;
+
+/**
+ * Class OneToOne
+ * @package think\model\relation
+ *
+ */
+abstract class OneToOne extends Relation
+{
+    // 预载入方式 0 -JOIN 1 -IN
+    protected $eagerlyType = 1;
+    // 当前关联的JOIN类型
+    protected $joinType;
+    // 要绑定的属性
+    protected $bindAttr = [];
+    // 关联方法名
+    protected $relation;
+
+    /**
+     * 设置join类型
+     * @access public
+     * @param string $type JOIN类型
+     * @return $this
+     */
+    public function joinType($type)
+    {
+        $this->joinType = $type;
+        return $this;
+    }
+
+    /**
+     * 预载入关联查询（JOIN方式）
+     * @access public
+     * @param Query    $query       查询对象
+     * @param string   $relation    关联名
+     * @param string   $subRelation 子关联
+     * @param \Closure $closure     闭包条件
+     * @param bool     $first
+     * @return void
+     */
+    public function eagerly(Query $query, $relation, $subRelation, $closure, $first)
+    {
+        $name  = Loader::parseName(basename(str_replace('\\', '/', $query->getModel())));
+        $alias = $name;
+        if ($first) {
+            $table = $query->getTable();
+            $query->table([$table => $alias]);
+            if ($query->getOptions('field')) {
+                $field = $query->getOptions('field');
+                $query->removeOption('field');
+            } else {
+                $field = true;
+            }
+            $query->field($field, false, $table, $alias);
+            $field = null;
+        }
+
+        // 预载入封装
+        $joinTable = $this->query->getTable();
+        $joinAlias = $relation;
+        $query->via($joinAlias);
+
+        if ($this instanceof BelongsTo) {
+            $query->join($joinTable . ' ' . $joinAlias, $alias . '.' . $this->foreignKey . '=' . $joinAlias . '.' . $this->localKey, $this->joinType);
+        } else {
+            $query->join($joinTable . ' ' . $joinAlias, $alias . '.' . $this->localKey . '=' . $joinAlias . '.' . $this->foreignKey, $this->joinType);
+        }
+
+        if ($closure) {
+            // 执行闭包查询
+            call_user_func_array($closure, [ & $query]);
+            // 使用withField指定获取关联的字段，如
+            // $query->where(['id'=>1])->withField('id,name');
+            if ($query->getOptions('with_field')) {
+                $field = $query->getOptions('with_field');
+                $query->removeOption('with_field');
+            }
+        } elseif (isset($this->option['field'])) {
+            $field = $this->option['field'];
+        }
+        $query->field(isset($field) ? $field : true, false, $joinTable, $joinAlias, $relation . '__');
+    }
+
+    /**
+     *  预载入关联查询（数据集）
+     * @param array    $resultSet
+     * @param string   $relation
+     * @param string   $subRelation
+     * @param \Closure $closure
+     * @return mixed
+     */
+    abstract protected function eagerlySet(&$resultSet, $relation, $subRelation, $closure);
+
+    /**
+     * 预载入关联查询（数据）
+     * @param Model    $result
+     * @param string   $relation
+     * @param string   $subRelation
+     * @param \Closure $closure
+     * @return mixed
+     */
+    abstract protected function eagerlyOne(&$result, $relation, $subRelation, $closure);
+
+    /**
+     * 预载入关联查询（数据集）
+     * @access public
+     * @param array    $resultSet   数据集
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResultSet(&$resultSet, $relation, $subRelation, $closure)
+    {
+        if (1 == $this->eagerlyType) {
+            // IN查询
+            $this->eagerlySet($resultSet, $relation, $subRelation, $closure);
+        } else {
+            // 模型关联组装
+            foreach ($resultSet as $result) {
+                $this->match($this->model, $relation, $result);
+            }
+        }
+    }
+
+    /**
+     * 预载入关联查询（数据）
+     * @access public
+     * @param Model    $result      数据对象
+     * @param string   $relation    当前关联名
+     * @param string   $subRelation 子关联名
+     * @param \Closure $closure     闭包
+     * @return void
+     */
+    public function eagerlyResult(&$result, $relation, $subRelation, $closure)
+    {
+        if (1 == $this->eagerlyType) {
+            // IN查询
+            $this->eagerlyOne($result, $relation, $subRelation, $closure);
+        } else {
+            // 模型关联组装
+            $this->match($this->model, $relation, $result);
+        }
+    }
+
+    /**
+     * 保存（新增）当前关联数据对象
+     * @access public
+     * @param mixed $data 数据 可以使用数组 关联模型对象 和 关联对象的主键
+     * @return Model|false
+     */
+    public function save($data)
+    {
+        if ($data instanceof Model) {
+            $data = $data->getData();
+        }
+        $model = new $this->model;
+        // 保存关联表数据
+        $data[$this->foreignKey] = $this->parent->{$this->localKey};
+        return $model->save($data) ? $model : false;
+    }
+
+    /**
+     * 设置预载入方式
+     * @access public
+     * @param integer $type 预载入方式 0 JOIN查询 1 IN查询
+     * @return $this
+     */
+    public function setEagerlyType($type)
+    {
+        $this->eagerlyType = $type;
+        return $this;
+    }
+
+    /**
+     * 获取预载入方式
+     * @access public
+     * @return integer
+     */
+    public function getEagerlyType()
+    {
+        return $this->eagerlyType;
+    }
+
+    /**
+     * 绑定关联表的属性到父模型属性
+     * @access public
+     * @param mixed $attr 要绑定的属性列表
+     * @return $this
+     */
+    public function bind($attr)
+    {
+        if (is_string($attr)) {
+            $attr = explode(',', $attr);
+        }
+        $this->bindAttr = $attr;
+        return $this;
+    }
+
+    /**
+     * 获取绑定属性
+     * @access public
+     * @return array
+     */
+    public function getBindAttr()
+    {
+        return $this->bindAttr;
+    }
+
+    /**
+     * 关联统计
+     * @access public
+     * @param Model    $result  数据对象
+     * @param \Closure $closure 闭包
+     * @return integer
+     */
+    public function relationCount($result, $closure)
+    {
+    }
+
+    /**
+     * 一对一 关联模型预查询拼装
+     * @access public
+     * @param string $model    模型名称
+     * @param string $relation 关联名
+     * @param Model  $result   模型对象实例
+     * @return void
+     */
+    protected function match($model, $relation, &$result)
+    {
+        // 重新组装模型数据
+        foreach ($result->getData() as $key => $val) {
+            if (strpos($key, '__')) {
+                list($name, $attr) = explode('__', $key, 2);
+                if ($name == $relation) {
+                    $list[$name][$attr] = $val;
+                    unset($result->$key);
+                }
+            }
+        }
+
+        if (isset($list[$relation])) {
+            $relationModel = new $model($list[$relation]);
+            $relationModel->setParent(clone $result);
+            $relationModel->isUpdate(true);
+
+            if (!empty($this->bindAttr)) {
+                $this->bindAttr($relationModel, $result, $this->bindAttr);
+            }
+        } else {
+            $relationModel = null;
+        }
+        $result->setRelation(Loader::parseName($relation), $relationModel);
+    }
+
+    /**
+     * 绑定关联属性到父模型
+     * @access protected
+     * @param Model $model    关联模型对象
+     * @param Model $result   父模型对象
+     * @param array $bindAttr 绑定属性
+     * @return void
+     * @throws Exception
+     */
+    protected function bindAttr($model, &$result, $bindAttr)
+    {
+        foreach ($bindAttr as $key => $attr) {
+            $key = is_numeric($key) ? $attr : $key;
+            if (isset($result->$key)) {
+                throw new Exception('bind attr has exists:' . $key);
+            } else {
+                $result->setAttr($key, $model ? $model->$attr : null);
+            }
+        }
+    }
+
+    /**
+     * 一对一 关联模型预查询（IN方式）
+     * @access public
+     * @param object        $model       关联模型对象
+     * @param array         $where       关联预查询条件
+     * @param string        $key         关联键名
+     * @param string        $relation    关联名
+     * @param string        $subRelation 子关联
+     * @param bool|\Closure $closure
+     * @return array
+     */
+    protected function eagerlyWhere($model, $where, $key, $relation, $subRelation = '', $closure = false)
+    {
+        // 预载入关联查询 支持嵌套预载入
+        if ($closure) {
+            call_user_func_array($closure, [ & $model]);
+            if ($field = $model->getOptions('with_field')) {
+                $model->field($field)->removeOption('with_field');
+            }
+        }
+        $list = $model->where($where)->with($subRelation)->select();
+
+        // 组装模型数据
+        $data = [];
+        foreach ($list as $set) {
+            $data[$set->$key] = $set;
+        }
+        return $data;
+    }
+
+}