我在 laravel 中遇到了'eager loading'的问题。
我正在处理 4 个相互关联的表。
我有这些模式:
<?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';
}
?>
现在我想“获取”一个对象中的所有数据。
当我这样做时:
$agendaTest = AgendaPersonalModel::with(array('periods', 'periods.weekdays'))->where('id', 1)->first();
完美运行
但是当我这样做的时候:
$agendaTest = AgendaPersonalModel::with(array('periods', 'periods.weekdays', 'weekdays.breaks'))->where('id', 1)->first();
我收到以下错误:
(1/1) RelationNotFoundException
Call to undefined relationship [weekdays] on model [App\Models\AgendaPersonalModel].
in RelationNotFoundException.php (line 20)
最佳答案
你可以这样做
$agendaTest = AgendaPersonalModel::with(['periods', 'periods.weekdays.breaks'])->where('id', 1)->first();
关于php - Laravel 急切加载 4 个表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45185021/