[英]How can I do a belongsTo() relation in Laravel?
Here is my model User.php
这是我的模型
User.php
class User extends Authenticatable
{
use Notifiable;
protected $fillable = [
'name', 'email', 'password', 'cell_phone', 'province_id', 'city_id', 'job'
];
protected $hidden = [
'password', 'remember_token',
];
public function city()
{
return $this->belongsTo('City');
}
}
And here is a part of my controller: 这是我的控制器的一部分:
$user_info = User::find(Auth::user()->id);
dd($user_info->city);
And it throws this: 并抛出以下内容:
"Undefined class constant 'city'"
“未定义的类常量'city'”
How can I fix the problem? 我该如何解决该问题?
Tables structure: 表结构:
// users
+----+--------+---------+----------
| id | name | city_id | ...
+----+--------+---------+----------
| 1 | Jack | 5 | ...
// city
+----+--------+
| id | name |
+----+--------+
| 1 | Tehran |
You need to pass full class name: 您需要传递完整的类名:
return $this->belongsTo('App\City');
Or: 要么:
return $this->belongsTo(City::class);
Also, you don't need to do that: 另外,您不需要这样做:
$user_info = User::find(Auth::user()->id);
Because Auth::user()
already has user instance loaded, you can just get city instance with: 由于
Auth::user()
已经加载了用户实例,因此您可以通过以下方式获取城市实例:
Auth::user()->city
Basically , you don't provide full path of your class name of city that's why you belongs To relation not working properly. 基本上,您没有提供城市类别名称的完整路径,这就是您所属的To关系无法正常工作的原因。
for example your code must be 例如您的代码必须是
return $this->belongs To('App/City');
Because your in app folder you have city class module and others. 因为您的应用程序文件夹中有城市类模块和其他模块。
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