Laravel 雄辩关系第三级

Question

表：

divisions
    id      name

districts
    id      division_id         name

subdistricts
    id      district_id         name


class Division extends Model
{
    //
    public function districts()
    {
        return $this->hasMany('App\District', 'division_id');
    }

    public function subdistricts()
    {
        // what will be here
    }

}

是否可以通过分区 ID 获取分区而不在分区表上使用分区 ID

Answer 1

阅读有关hasManyThrough()关系。所以，subdisctricts()看起来像这样：

public function subdisctricts()
{
    return $this->hasManyThrough('App\SubDistrict', 'App\District');
}