关于php：laravel添加静态函数boot()后的模型未定义索引

laravel Model Undefined index after add static function boot()

我将此语法添加到模型中：

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public static function boot()
{
if(Auth::user()){
parent::boot();
static::saving(function ($model) {
$model->school_id = Auth::user()->school_id;
});

static::addGlobalScope('school_id', function (Builder $builder) {
$builder->where('school_id', Auth::user()->school_id);
});
}
}

在网络上运行良好，但在API中效果不佳，错误：

ErrorException: Undefined index: App\\SmStudent in file
/home/simsmar/public_html/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php
on line 241

。

Laravel框架5.8.37

当我删除" if(Auth :: user())"而仅删除" public static function时
boot()"仍然是相同的错误