仅当下拉值为“其他"时才验证“其他"字段 [英] Validating 'other' field only if dropdown value is 'other'

问题描述

一个稍微复杂的解释，但一个非常普通的用例.

Slightly complicated one to explain, but a very common use case.

我的页面上有此字段:

<select class="form-control" name="how_you_heard_about_us" id="select-hearaboutus">

其中的所有选项都有名称，包括以下名称:

All of the options within it have names, including this one:

<option value="Other">Other</option>

我还有一个文本输入，只有在用户选择其他"时才需要.

I also have a text input, which is only required if the user selects 'Other'.

这是我的简明验证码:

$this->validate($request, [
    'first_name' => 'required|max:20',
    'last_name' => 'required|max:20',
    'how_you_heard_about_us' => 'required'
]);

我正在尝试进行设置，因此，如果下拉菜单设置为其他"，则只需要用户输入文本字段即可.

I'm trying to set it up, so that the user is only required to enter into the text field, if the dropdown is set to 'other'.

如何在Laravel 5.2中有条件地要求使用自由文本字段?

How can I conditionally require the free text field, in Laravel 5.2?

推荐答案

您正在寻找 required_if 规则:

You're looking for the required_if rule:

'your_text_field' => 'required_if:how_you_heard_about_us,Other'

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