laravel 一对多在一侧返回 null

Question

我有一个一对多的关系，在一侧返回值，在另一侧返回 null！

class Particular extends Eloquent 

public function calls()
{
    return $this->hasMany('Call');
}

这个关系传递返回值

[

    {
        "id": 1,
        "date": "2014-10-16",
        "time": "12:12:12",
        "quote_id": 1,
        "repairman_id": 17,
        "particular_id": 2,
        "created_at": "-0001-11-30 00:00:00",
        "updated_at": "-0001-11-30 00:00:00"
    },
    {
        "id": 2,
        "date": "2014-10-21",
        "time": "12:12:12",
        "quote_id": 2,
        "repairman_id": 30,
        "particular_id": 2,
        "created_at": "-0001-11-30 00:00:00",
        "updated_at": "-0001-11-30 00:00:00"
    }

]

但是当我在另一边尝试时

class Call extends Eloquent 

public function particularCall() {
    return $this->belongsTo('Particular'); 
}

它什么也不返回？？？

Answer 1

您应该尝试：

Route::get('test', function() { 
   $Call = Call::find(2); 
   return $Call->particularCall(); 
}); 

或

Route::get('test', function() { 
   $Call = Call::with('particularCall')->find(2); 
   return $Call->particularCall; 
});