[英]Laravel, using pivot table in relations
Laravel 5.3,我有这两个模型:
用户,具有以下关系:
public function newFunctions()
{
return $this->belongsToMany('App\NewFunctions', 'user_newfunctions');
}
新功能:
public static function getAllFunctions() {
$functions = DB::table('new_functions as nf')
->select('nf.*')
->get();
return $functions;
}
public function users(){
return $this->belongsToMany('App\User', 'user_newfunctions', 'new_function_id', 'user_id');
}
(在我收到这个代码之前, getAllFunctions
就在那里......不要谈论它,还有很多其他控制器在使用这种方法......我不知道它的版本是否如此,但为什么他妈的老程序员没有使用all()
代替)
然后,在我的控制器中,我这样做:
$user = User::findOrFail($id);
foreach ($user->newFunctions as $key => $function) {
//dd($function);
$user_new_functions[] = [$function->id, 69];
}
dd($user_new_functions);
与dd($function);
我明白了:
NewFunctions {#961 ▼
#table: "new_functions"
#connection: null
#primaryKey: "id"
#keyType: "int"
#perPage: 15
+incrementing: true
+timestamps: true
#attributes: array:7 [▶]
#original: array:9 [▶]
#relations: array:1 [▼
"pivot" => Pivot {#962 ▼
#parent: User {#770 ▶}
#foreignKey: "user_id"
#otherKey: "new_functions_id"
#guarded: []
#connection: null
#table: "user_newfunctions"
#primaryKey: "id"
#keyType: "int"
#perPage: 15
+incrementing: true
+timestamps: false
#attributes: array:2 [▼
"user_id" => 814
"new_functions_id" => 1
]
#original: array:2 [▶]
#relations: []
并与dd($user_new_functions);
我得到:
array:2 [▼
0 => array:2 [▼
0 => 1
1 => 69
]
1 => array:2 [▼
0 => 3
1 => 69
]
]
我需要的是,而不是69
我需要传递数据透视表user_newfunctions
的function_count
的值
那张桌子是这样的:
user_id | new_functions_id | function_count
-------------------------------------------
814 | 1 | 5
814 | 3 | 7
这样我就可以在dd($user_new_functions);
这个:
array:2 [▼
0 => array:2 [▼
0 => 1
1 => 5
]
1 => array:2 [▼
0 => 3
1 => 7
]
]
那个数组是我的目标。 请,任何帮助。
您需要在关系中包含->withPivot()
方法:
User.php
:
public function newFunctions(){
return $this->belongsToMany('App\NewFunctions', 'user_newfunctions')->withPivot(['function_count']);
}
NewFunctions.php
:
public function users(){
return $this->belongsToMany('App\User', 'user_newfunctions', 'new_function_id', 'user_id')->withPivot(['function_count']);
}
现在,在查询关系时,包含->withPivot()
方法中的所有列的->pivot
属性将可用。 您可以使用以下内容替换69
:
$user = User::with(['newFunctions'])->findOrFail($id);
foreach ($user->newFunctions as $key => $function) {
$user_new_functions[] = [$function->id, $function->pivot->function_count];
}
dd($user_new_functions);
注意:添加with(['newFunctions'])
用于急切加载(潜在的性能提升,但不是必需的)
该文档描述了如何检索略低于“多对多”关系信息的中间表列: https : //laravel.com/docs/5.8/eloquent-relationships#many-to-many
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