Laravel渴望加載4表

Question

我有laravel'急切加載'的這個問題。

我正與4個相互關聯的表一起工作。

我有這些模態：

<?php 
class AgendaPersonalModel extends Model 
{ 
    protected $table = 'agenda_personal'; 

    public function periods() { 

     return $this->hasMany(AgendaPersonalPeriodModel::class, 'agenda_id'); 

    } 
} 
?> 

---

class AgendaPersonalPeriodModel extends Model 
{ 
    protected $table = 'agenda_personal_period'; 


     public function weekdays() { 

     return $this->hasMany(AgendaPersonalWeekdaysModel::class, 'period_id'); 

    } 

---

<?php 
class AgendaPersonalWeekdaysModel extends Model 
{ 
    protected $table = 'agenda_personal_weekdays'; 


    public function breaks() { 

     return $this->hasMany(AgendaPersonalBreakModel::class, 'weekday_id'); 

    }  

} 
?> 

---

<?php 
class AgendaPersonalBreakModel extends Model 
{ 
    protected $table = 'agenda_personal_breaks'; 
} 

?> 

現在我想將某個對象的 '得到' 的所有數據。

當我這樣做：

$agendaTest = AgendaPersonalModel::with(array('periods', 'periods.weekdays'))->where('id', 1)->first(); 

它完美的作品

，但是當我這樣做：

$agendaTest = AgendaPersonalModel::with(array('periods', 'periods.weekdays', 'weekdays.breaks'))->where('id', 1)->first(); 

我收到以下錯誤：

(1/1) RelationNotFoundException 
Call to undefined relationship [weekdays] on model [App\Models\AgendaPersonalModel]. 
in RelationNotFoundException.php (line 20) 

Answer 1

你可以做到這一點

$agendaTest = AgendaPersonalModel::with(['periods', 'periods.weekdays.breaks'])->where('id', 1)->first(); 

Answer 2

待辦事項這個：

AgendaPersonalModel::with(['periods', 'periods.weekdays' => function ($q) { 
     $q->with('breaks'); 
    }])->find(1);