我在Laravel 5.4中使用了Eloquent模型
在文档中,我看到：

You may also use the create method to save a new model in a single
line. The inserted model instance will be returned to you from the
method. However, before doing so, you will need to specify either a
fillable or guarded attribute on the model, as all Eloquent models
protect against mass-assignment by default.

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Flight extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = ['name'];
}

但是,$fillable属性已在所有模型使用的特征中定义：

trait GuardsAttributes
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [];

...

PHP文档清楚了解Traits属性：

If a trait defines a property then a class can not define a property
with the same name, otherwise an error is issued. It is an E_STRICT if
the class definition is compatible (same visibility and initial value)
or fatal error otherwise.

Laravel文档是否对于所提供的实现是错误的？

最佳答案:

您不能在PHP文档建议的同一个类中覆盖特征属性.

但是,Laravel要求您在子类中覆盖它(您的模型类扩展了Eloquent模型类,并且特征包含在Eloquent模型类中,而不是您的模型类中).这是一个非常有效的事情！