如果值存在于另一个字段数组中，则 Laravel 验证规则

问题描述

我在 Laravel 5.4 中工作，我需要一个稍微具体的验证规则，但我认为这应该很容易实现，而无需扩展类.只是不知道如何使这项工作..

如果 program 数组包含 'Music'，我想做的是将 'music_instrument' 表单域设为必填.>

我发现了这个帖子 如何设置 require 如果在验证 laravel 的另一个多选字段中选择了值? 但这不是一个解决方案(因为它首先从未得到解决)以及它没有解决的原因't work 是因为提交的数组索引不是常量(在索引提交结果时不考虑未选中的复选框...)

我的情况是这样的:

<字段集><input name="program[]" value="Anthropology" type="checkbox">Anthropology<input name="program[]" value="Biology" type="checkbox">Biology<input name="program[]" value="Chemistry" type="checkbox">Chemistry<input name="program[]" value="Music" type="checkbox">Music<input name="program[]" value="Philosophy" type="checkbox">Philosophy<input name="program[]" value="Zombies" type="checkbox">Zombies<input name="music_instrument" type="text" value""><button type="submit">提交</button></fieldset></表单>

如果我从复选框列表中选择一些选项，我可能会在我的 $request 值中得到这个结果

[程序] =>大批([0] =>人类学[1] =>生物学[2] =>音乐[3] =>哲学)[音乐乐器] =>'吉他'

在此处查看验证规则:https://laravel.com/docs/5.4/validation#available-validation-rules 我认为像他这样的东西应该可以工作，但我实际上什么也没得到:

 $validator = Validator::make($request->all(),['程序' =>'必需的'，'music_instrument' =>'required_if:program,in:Music']);

我希望这也能奏效，但没有运气:

'music_instrument' =>'required_if:program,in_array:Music',

想法?建议?

谢谢！

没试过，但在一般的数组字段中你通常这样写:program.*，所以可能是这样的将工作:

 $validator = Validator::make($request->all(),['程序' =>'必需的'，'music_instrument' =>'required_if:program.*,in:Music']);

如果它不起作用，显然你也可以用另一种方式来做，例如这样:

$rules = ['program' =>'必需的'];if (in_array('Music', $request->input('program', []))) {$rules['music_instrument'] = 'required';}$validator = Validator::make($request->all(), $rules);

I am working in Laravel 5.4 and I have a slightly specific validation rules need but I think this should be easily doable without having to extend the class. Just not sure how to make this work..

What I would like to do is to make the 'music_instrument' form field mandatory if program array contains 'Music'.

I found this thread How to set require if value is chosen in another multiple choice field in validation of laravel? but it is not a solution (because it never got resolved in the first place) and the reason it doesn't work is because the submitted array indexes aren't constant (not selected check boxes aren't considered in indexing the submission result...)

My case looks like this:

<form action="" method="post">
    <fieldset>

        <input name="program[]" value="Anthropology" type="checkbox">Anthropology
        <input name="program[]" value="Biology"      type="checkbox">Biology
        <input name="program[]" value="Chemistry"    type="checkbox">Chemistry
        <input name="program[]" value="Music"        type="checkbox">Music
        <input name="program[]" value="Philosophy"   type="checkbox">Philosophy
        <input name="program[]" value="Zombies"      type="checkbox">Zombies

        <input name="music_instrument" type="text" value"">

        <button type="submit">Submit</button>

    </fieldset>
</form>

If I select some of the options from the list of check boxes I can potentially have this result in my $request values

[program] => Array
    (
        [0] => Anthropology
        [1] => Biology
        [2] => Music
        [3] => Philosophy
    )

[music_instrument] => 'Guitar'

Looking at validation rules here: https://laravel.com/docs/5.4/validation#available-validation-rules I think something like his should work but i am literally getting nothing:

  $validator = Validator::make($request->all(),[
        'program'           => 'required',
        'music_instrument'  => 'required_if:program,in:Music'
  ]);

I was hoping this would work too but no luck:

'music_instrument'  => 'required_if:program,in_array:Music',

Thoughts? Suggestions?

Thank you!

Haven't tried that, but in general array fields you usually write like this: program.*, so maybe something like this will work:

  $validator = Validator::make($request->all(),[
        'program'           => 'required',
        'music_instrument'  => 'required_if:program.*,in:Music'
  ]);

If it won't work, obviously you can do it also in the other way for example like this:

$rules = ['program' => 'required'];

if (in_array('Music', $request->input('program', []))) {
    $rules['music_instrument'] = 'required';
}

$validator = Validator::make($request->all(), $rules);

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