我有两张桌子。
(图片)
+----+------------+-------------------------------+
| id | picture_id | picture_file_name |
+----+------------+-------------------------------+
| 1 | 13 | 2015-12-22-19-00-15-82823.jpg |
| 2 | 13 | 2015-12-22-19-00-15-82234.jpg |
+----+------------+-------------------------------+
(电动机)
+----+------------+-------+
| id | picture_id | name |
+----+------------+-------+
| 1 | 13 | John |
| 2 | 0 | Chris |
+----+------------+-------+
我有两个模特。
(电动机)
class Motors extends Eloquent
{
protected $table = 'motors';
public function picture(){
return $this->belongsToMany('App\Pictures','picture_id','picture_id'); // Here is the problem, but I don't know what is it.
}
}
(图片)
class Pictures extends Eloquent
{
protected $table = 'pictures';
public function motors(){
return $this->hasMany('App\Motors');
}
}
(控制器)
class TestController extends Controller
{
public function found(Request $request) {
$q = Motors::query();
// ... queries
$motors = $q->orderBy('id', 'DESC')->paginate(14);
$motors->load('picture');
//dd($motors);
return view('pages.motors_found', compact('motors'));
}
}
(视图)
@foreach ($motors as $motor)
{{ $motor->name }}
@if (!empty($motor->picture_id))
<ul>
@foreach($motor->picture as $row)
<li>{{ $row->picture_file_name }}</li>
@endforeach
</ul>
@endif
@endforeach
(错误信息)
QueryException in Connection.php line 651:
SQLSTATE[42S02]: Base table or view not found: 1146 Table 'laramotor.picture_id' doesn't exist (SQL: select `pictures`.*, `picture_id`.`picture_id` as `pivot_picture_id`, `picture_id`.`pictures_id` as `pivot_pictures_id` from `pictures` inner join `picture_id` on `pictures`.`id` = `picture_id`.`pictures_id` where `picture_id`.`picture_id` in (3025, 3015, 3014, 3013, 3012, 3011, 3010, 3009, 3008, 3007, 3006, 3005, 3004, 3003))
它回复了一个错误,可能是什么错误? 我想要回显一下属于给定电机的所有图片的picture_file_name。 在此先感谢您的帮助。
答案 0 :(得分:2)
除了belongsToMany
方法中参数的错误使用外,您的关系定义中存在问题。
由于电机至少可以有一张图片,并且图片可能只属于一种类型的电机,因此您的关系应该如下:
Motor 有很多图片
[逆]图片属于电机
电机型号:
class Motors extends Eloquent //normally a model name should be singular
{
protected $table = 'motors';
public function picture(){
return $this->hasMany('App\Pictures');
}
}
图片模型:
class Pictures extends Eloquent
{
protected $table = 'pictures';
public function motors(){
return $this->belongsTo('App\Motors');
}
}