我在控制器上遇到以下代码问题:
$opportunity_date = $oppr_arr->opportunity_date;
$locations_array_result = explode(",",$locations_array_result);
$usersCount = User::where('activated', '=', 1)
->where('group_id', '=', 1)
->where('availability_date', '<=', $opportunity_date)
->get();
foreach ($locations_array_result as $param) {
$usersCount = $usersCount->whereHas('desiredLocation', function ($q) use($param) {
$q->where('location_id', '=', $param );
});
}
$usersCount = $usersCount->count();
当我运行它时,它会给我以下错误:
Call to undefined method Illuminate\Database\Eloquent\Collection::whereHas()
我的关系设置如下:
用户模型
public function desiredLocation() {
return $this->belongsToMany('Location', 'user_desired_location');
}
位置模型
class Location extends \Eloquent {
protected $table = 'locations';
protected $fillable = array('name');
public function country() {
return $this->belongsTo('Country');
}
}
user_desired_location
表的数据库结构是:
- id
- user_id
- location_id
答案 0 :(得分:3)
您过早地调用get
并且在您想要之前运行查询。在foreach
循环解决后移动它:
$usersCount = User::where('activated', '=', 1)
->where('group_id', '=', 1)
->where('availability_date', '<=', $opportunity_date);
foreach ($locations_array_result as $param) {
$usersCount = $usersCount->whereHas('desiredLocation', function($q) use($param){
$q->where('location_id', '=', $param );
});
}
$users = $usersCount->get();
$usersCount = $users->count();
另请注意:如果您感兴趣的是计数,并且您不会使用实际用户,则无需致电get
然后count
;这会通过实际获取所有用户并在PHP端对其进行计数来生成不必要的负载。相反,直接使用count
,Eloquent将发出COUNT()
查询,在数据库端执行此操作。像这样:
$usersCount = $usersCount->count();