数据库时间字段cast

app/Models/VideoDanmakus.php

@@ -7,6 +7,7 @@ use Illuminate\Database\Eloquent\Model;
 class VideoDanmakus extends Model
 {
     protected $table = "video_danmakus";
+    protected $dateFormat = 'U';
     public function video(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo(Videos::class, "video_bvid", "bvid");