通过字符串调用 Laravel 模型

问题描述

是否可以通过字符串调用 Laravel 模型?

Is it possible to call a Laravel model by string?

这就是我想要实现的目标，但它失败了:

This is what i'm trying to achieve but its failing:

$model_name = 'User';
$model_name::where('id', $id)->first();

我收到以下异常:

exception 'ErrorException' with message 'Undefined variable: User'

推荐答案

是的，您可以这样做，但您需要使用完全限定的类名:

Yes, you can do this, but you need to use the fully qualified class name:

$model_name = 'AppModelUser';
$model_name::where('id', $id)->first();

如果您的模型名称存储在普通变量以外的其他内容(例如对象属性)中，您将需要使用中间变量才能使其工作.

If your model name is stored in something other than a plain variable (e.g. a object attribute), you will need to use an intermediate variable in order to get this to work.

$model = $this->model_name;
$model::where('id', $id)->first();

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