Laravel Eloquent With（）With（）

Question

如何使用多个Eloquent With（）＆＃39;

PortalPlaylistElement模型

class PortalPlaylistElement extends Model
{
    public $primaryKey = 'code';
    public $incrementing = false;
    public $timestamps = false;

    public function AirtimePlaylists()
    {
        return $this->hasOne('App\AirtimePlaylist','id','playlist_id');
    }
}

AirtimePlaylistContent Model

class AirtimePlaylistContent extends Model
{
    protected $table = 'cc_playlistcontents';
}

AirtimePlaylistModel

class AirtimePlaylist extends Model
{
    protected $table = 'cc_playlist';

    public function PortalPlaylistElements()
    {
        return $this->belongsTo('App\PortalPlaylistElement','playlist_id');
    }

    public function AirtimePlaylistContents()
    {
        return $this->hasMany('App\AirtimePlaylistContent','playlist_id');
    }
}

我没有遇到任何问题：

AirtimePlaylist::with('AirtimePlaylistContents')->get());

或

PortalPlaylistElement::with('AirtimePlaylists')->get();

但我想在属于PortalPlaylistElement的AirtimePlaylist中获取所有AirtimePlaylistContents。

本质上，（伪代码）

PortalPlaylistElement::with('AirtimePlaylists')::with('AirtimePlaylistContents')->get();

Answer 1

您需要Nested Eager Looading

PortalPlaylistElement::with('AirtimePlaylists.AirtimePlaylistContents')->get();

Answer 2

嵌套关系

 with('relation1.relation2.relation3)->get(); // relation1 has relation2 relation2 has relation 3

不是嵌套关系

 with('relation1','relation2','relation3')->get(); // you model has all relations

Answer 3

如果有人需要，我想补充一下

 with(['relation1.relation2-1','relation1.relation2-2'])->get(); // relation1 has relation2-1 and relation1 also has relation2-2