無法添加或更新子行：外鍵約束失敗（Laravel）

我有錯誤，並且我不知道如何正確使用Eloquent關係：c 類別編號採取正確，但用戶標識爲錯誤。我認爲這是從表models。 id，但需要models。 user_id 這裏是我的表：無法添加或更新子行：外鍵約束失敗（Laravel）

photoset_categories（目錄同photoset類型，例如：id = 1, name = 'Studio'; id = 2, name = 'Portrait'）

Schema::create('photoset_categories', function (Blueprint $table) { 
    $table->increments('id'); 
    $table->string('name')->comment('Category name'); 
});

模型（模型數據：眼睛的顏色，身高，體重等。）

Schema::create('models', function (Blueprint $table) { 
    $table->increments('id'); 
    $table->integer('user_id')->comment('Model id from users'); 
    $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade'); // Foreign key 

    $table->timestamps(); 
});

model_photosets（在該照片拍攝模式拍攝）

Schema::create('model_photosets', function (Blueprint $table) { 
    $table->increments('id'); 
    $table->integer('model_id')->unsigned()->index(); 
    $table->foreign('model_id')->references('user_id')->on('models')->onDelete('cascade'); // Foreign key 
    $table->integer('category_id')->unsigned()->index(); 
    $table->foreign('category_id')->references('id')->on('photoset_categories')->onDelete('cascade'); // Foreign key 
});

下面是DB型號：

class PhotosetCategory extends Model 
{ 
    protected $table = 'photoset_categories'; 
    protected $guarded = ['name']; 

    public function modelPhotoset() 
    { 
     return $this->belongsToMany('App\Models'); 
    } 
}

...

class Models extends Model 
{ 
    protected $table = 'models'; 
    protected $fillable = ['user_id', 'd_birth', 'birth', 'm_birth', 'y_birth', 'hair_color', 'eyes_color', 'growth', 'weight']; 
    protected $dates = ['created_at', 'updated_at']; 


    public function user() { 
     return $this->belongsToMany('App\User'); 
    } 

    public function photosets() 
    { 
     return $this->belongsToMany('App\PhotosetCategory', 'model_photosets', 'model_id', 'category_id'); 
    } 
}

...

class ModelPhotoset extends Model 
{ 
    protected $table = 'model_photosets'; 
    protected $fillable = ['user_id', 'category_id']; 
}

控制器ModelsController

class ModelsController extends Controller 
{ 
    public function editData(Request $request) 
    { 
     $title = 'Model data'; 

     $data = Models::where('user_id', Auth::id())->first(); 

     $all_types = PhotosetCategory::all(); // List of photo shoot catagories 

     if ($request->has('save')) { 
      $this->validate($request, [ 
       // ... 
      ]); 

      // UPDATE USER PRO SHOOTS DATA 
      $data->photosets()->sync($request->get('ps_types')); 
     } 

     return view('model.edit', [ 
      'title' => $title, 
      'data' => $data, 
     ]); 
    } 
}

錯誤：

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (delavour . model_photosets , CONSTRAINT model_photosets_model_id_foreign FOREIGN KEY (model_id) REFERENCES models (user_id) ON DELETE CASCADE) (SQL: insert into model_photosets (category_id , model_id) values (2, 2))

來源

2017-04-18 MyZik

錯誤表明你正在嘗試插入model_photosets與MODEL_ID 2，但在車型紀錄ID 2行得退出。

來源

2017-04-18 17:59:00

我知道。「2」 - 模型表中的字段「id」。但我需要獲取字段'user_id'：c 屏幕截圖： https://drive.google.com/open?id=0B8BExJ-ydlwLUVVBM3BkYk5LOFk – MyZik

無法添加或更新子行：外鍵約束失敗（Laravel）

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