Laravel - 验证 - 如果字段为空则要求
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Laravel - Validation - Require if field is null
提问by Eliya Cohen
Let's say I have this html code:
假设我有这个 html 代码：
<input type="email" name="email">
<input type="password" name="password">
Or this:
或这个：
<input type="hidden" name="user_id" value="1">
(If the user is logged in, only the user_idfield will be shown. else - the credentials fields).
（如果用户已登录，则只会显示该user_id字段。否则 - 凭据字段）。
When I create a request, there's a validation that checks the user. if the field user_idexists (i.e if user_idexists in the users table), then there's no need to require emailand passwordinputs. If there's no user_id, then the emailand passwordfields will be required.
当我创建一个请求时，有一个检查用户的验证。如果该字段user_id存在（即如果user_id存在于用户表中），则不需要要求email和password输入。如果没有user_id，则email和password字段将是必需的。
In other words, I want to do something like this:
换句话说，我想做这样的事情：
public function rules()
{
return [
'user_id' => 'exists:users,id',
'email' => 'required_if_null:user_id|email|...',
'password' => 'required_if_null:user_id|...'
];
}
回答by Eliya Cohen
After reading the Validation docs again, I found a solution. I just needed to do the opposite, using the required_withoutvalidation:
再次阅读验证文档后，我找到了解决方案。我只需要做相反的事情，使用required_without验证：
public function rules()
{
return [
'user_id' => 'exists:users,id',
'email' => 'required_without:user_id|email|unique:users,email',
'password' => 'required_without:user_id',
}
