Laravel 增变器不自动设置模型属性

Question

在我的项目中有一个 PackageRequest 模型，这个模型有一个 tracking_code。我想用一个增变器自动设置这个属性。这是我的突变体：

 public function setTrackingCodeAttribute()
    {

        $code = mt_rand(1000000, 9999999);
        $this->attributes['tracking_code'] = "$code";
    }

但是当我将新请求保存到数据库时没有tracking_code

这是我创建新 PackageRequest 的代码部分：

 public function store(Request $request)
    {
        $input = $request->only(['requested_time', 'address_id']);
        $valid = validator($input, [
            'requested_time' => 'required|date',
            'address_id' => 'required|numeric|exists:addresses,id'
        ]);

        if ($valid->fails())
            return Response::fail($valid->errors());
        $package_request = new PackageRequest($input);
        $package_request->user_id = \Auth::id();
        $package_request->status = 'waiting';

        if(!$package_request->save())
            return Response::error(__('errors.save_data', ['attr' => __('errors.attribures.package_request')]));

        return Response::success(PackageRequest::find($package_request->id), 201);
    }

Answer 1

The mutator will receive the value that is being set on the attribute, allowing you to manipulate the value and set the manipulated value on the Eloquent model's internal $attributes property.

当您尝试将值设置为属性 tracking_code 并且您未对其设置任何内容时，将自动调用增变器。您需要在 creating 之前将默认值设置为 tracking_code，这样您就可以在模型 PackageRequest 中添加这些代码：

protected static function boot()
{
    parent::boot();
    static::creating(function($package_request)
    {
        $package_request->tracking_code = mt_rand(1000000, 9999999);
    });
}

Laravel 增变器不自动设置模型属性

Laravel mutator do not set model attribute automatically

laravel

eloquent

laravel-6