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2019-09-06 23:53:10 +08:00
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thinkphp/library/think/model/relation/BelongsTo.php Executable file
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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);
}
}