使用Laravel Request在更新方法上传递空字段 [英] Pass empty fields on the update method using Laravel Request

问题描述

我正在通过经典的提交表单获取数据，但是由于某种原因，我没有在请求中获取所有输入数据，因此只会更新接收到的数据.

I'm getting data through a classic submitted form but for some reason I don't get all the input's data in request and it only updates the received ones.

Model::find($id)->update($request->all());

这有点问题，因为我的数据库中有多个可为空的字段，有时我想传递空字段(即，当用户清除输入然后提交表单时)

This is a bit problematic because I have multiple nullable fields in my database and sometimes I want to pass empty fields (i.e when a user clear an input then submit the form)

您还知道一种将空字段传递给请求的方法吗?

Do you know a way to pass empty fields to the Request as well?

推荐答案

问题是，Laravel默认通过

The thing is, Laravel transforms the '' values to null by default through the ConvertEmptyStringsToNull middleware. Check your Kernel:

app/Http/Kernel.php

protected $middleware = [
    // ...
    \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
    // ...
];

此中间件执行以下操作:

This middleware do the following:

protected function transform($key, $value)
{
    return is_string($value) && $value === '' ? null : $value;
}

如您所见，如果给定属性的值为''，它将被转换为null.

As you can see, if the given attribute has a value '' it will be transformed to null.

因此，要避免这种情况，您可以在内核文件中注释该中间件.但请注意这一点，因为它将应用于您的整个应用程序.

So, to avoid this you could just comment that middleware in the Kernel file. But be aware of this, because this will be applied to your entire application.

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