在laravel验证中，如果在另一个多选字段中选择了值，如何设置要求? [英] How to set require if value is chosen in another multiple choice field in validation of laravel?

问题描述

我有这样的表格:

<input type="checkbox" name="category[]" value="a">Option A</option>
<input type="checkbox" name="category[]" value="b">Option B</option>
<input type="checkbox" name="category[]" value="c">Option C</option>
<input type="checkbox" name="category[]" value="d">Option D</option>
<input type="checkbox" name="category[]" value="e">Option E</option>
<input type="checkbox" name="category[]" value="f">Option F</option>

<input type="text" name="description">

如果选择了选项A，我想在laravel 5中进行后端验证时需要描述.

If option A is chosen, I want to make description required in backend validation in laravel 5. So I tried:

$validator = Validator::make($request->all(), [
        'description' => 'required_if:category,a',
    ]);

if ($validator->fails()) {
        return "error!"
}

但是，检查不起作用.我应该如何设置验证规则才能使其生效?

However, the checking is not working. How should I set the validation rule to make it works?

推荐答案

首先，您需要找到带有value = 'a'的复选框的索引，在您的示例中是0，可以通过以下方式完成:$index = array_search('a', $request->get('category'));.最后验证是:

First you need find index of checkbox with value = 'a', in your example is 0 and it can be done by: $index = array_search('a', $request->get('category'));. And finally validation is:

[
    'description' => 'required_if:category.0,a',
]

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