通过字符串调用Laravel模型 [英] Call Laravel model by string

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?

这是我想要达到的目标，但失败了:

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，但是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 = 'App\Model\User';
$model_name::where('id', $id)->first();

如果您的模型名称存储在除普通变量(例如对象属性)之外的其他内容中，则您需要使用中间变量才能使其正常工作.

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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