Laravel验证：如何检查给定数组中是否存在值？
问题描述：
我尝试了很多验证文档中的方法，但都给出了同样的错误说明：
Array to string conversion
下面是我如何添加数组的：
$this->validate($request,[
'employee' => 'required|in:'.$employee->pluck('id')->toArray(),
],[
'employee.in' => 'employee does not exists',
]);
对于如何实现这一点有什么提示吗？
我创建了一个自定义验证器，但仍然无法传递数组。
答
Implode the array as a string and join it on commas.
'employee' => 'required|in:'.$employee->implode('id', ', '),
This will make the correct comma separated string that the validator expects when making an in comparison.
答
Update: You are now able to use the Rule class instead of imploding values yourself as described in the correct answer. Simply do:
['someProperty' => ['required', Rule::in(['needed', 'stuff'])]];
As mentioned in the 'validating arrays' section in the documentation: https://laravel.com/docs/5.6/validation#validating-arrays