检查类是否是 Laravel 5 中的模型

Check if a class is a Model in Laravel 5

提问by g4b0

I have this code in Laravel 5.2 that checks if a given db table name ($what) has its own Model :

我在 Laravel 5.2 中有这段代码，用于检查给定的 db 表名（$what）是否有自己的 Model ：

public function manage($what) {

    $model = Str::studly(Str::singular($what));
    if (!is_subclass_of($model, 'Model')) {
        \App::abort(404);
    }

    /* [... other stuff ...] */
}

The problem is that is_subclass_of always fail, also when the model exist and it's a subclass of Model. I suppose it's a namespace problem, how can I fix it?

问题是 is_subclass_of 总是失败，当模型存在并且它是模型的子类时也是如此。我想这是一个命名空间问题，我该如何解决？

回答by Alexey Mezenin

You can check if your object is an instance of a model with instanceof:

您可以使用以下命令检查您的对象是否是模型的实例instanceof：

$article = new \App\Article();

if ($article instanceof \Illuminate\Database\Eloquent\Model) {

回答by aynber

You may need the full namespace. When I do get_parent_class()on one of my models, it returns Illuminate\Database\Eloquent\Model. So use this instead:

您可能需要完整的命名空间。当我在我的get_parent_class()一个模型上做时，它返回Illuminate\Database\Eloquent\Model. 所以改用这个：

$model = 'App\' . Str::studly(Str::singular($what));
if (!is_subclass_of($model, 'Illuminate\Database\Eloquent\Model')) {