Question

我想存储每个会员注册时的会员购物日。但是这里的attach()方法不起作用。它说Integrity constraint violation: 1452。我定义了BelongToMany关系。这是我的Member模型：

public function dayShop(){
        return $this->belongsToMany(Days::class, 'member_shops','member_id','day_name');
 }

这是我的控制器：

public function store(Request $request)
    {
        $member = new Member();
        $member->name=$request->name;
        $member->balance=$request->balance;
        $member->email=$request->email;
        $member->password=Hash::make($request->password);
        $member->role=$request->role;
        $member->save();
        $member->dayShop()->attach('1', ['day_name' => 'Something']);
        return back();
    }

member_shops表：

 Schema::create('member_shops', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('member_id')->unsigned()->nullable();
        $table->foreign('member_id')->references('id')
            ->on('members')->onUpdate('cascade')->onDelete('cascade');
        $table->string('day_name')->nullable();
        $table->foreign('day_name')->references('name')
            ->on('days')->onUpdate('cascade')->onDelete('cascade');
        $table->timestamps();
    });

错误是：

SQLSTATE [23000]：违反完整性约束：1452无法添加或更新子行：外键约束失败（{meal。member_shops，约束member_shops_day_name_foreign 删除级联上的外键（day_name）参考days（name）在更新级联（SQL：插入member_shops（day_name中， member_id）值（某事，18））

Laravel BelongsToMany attach（）无法正常工作

0 个答案: