Question

我有错误，而且我不知道如何正确使用雄辩的关系：c 正确使用类别编号，但用户ID错误。我认为它取自表models。id，但需要models。user_id 这是我的表格：

photoset_categories （带照片集类型的目录，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（模型数据：眼睛颜色，身高，体重等）

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 （拍摄照片的照片）

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
});

以下是DB模型：

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'];
}

Controller 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,
        ]);
    }
}

错误：

SQLSTATE [23000]：完整性约束违规：1452无法添加或更新子行：外键约束失败（delavour。model_photosets，CONSTRAINT model_photosets_model_id_foreign FOREIGN KEY（model_id）参考 models（user_id）ON DELETE CASCADE）（SQL：insert into model_photosets（category_id，model_id）值（2,2））

Answer 1

错误显示您正在尝试使用model_id 2插入到model_photosets中，但是在ID为2的模型中的记录不会退出。

无法添加或更新子行：外键约束失败（Laravel）

1 个答案: