laravel - "Not"验证规则中的运算符

Question

我有一个自定义验证规则 is_admin，用于检查用户是否是管理员。

Laravel 是否有一个“相反”运算符(就像 ! 在 PHP 中的工作方式一样)，这样我就可以执行类似 not:is_admin 的操作，这将检查用户不是管理员:

$rules = array(
    'user_id' => 'required|numeric|not:is_admin'
);

$validator = Validator::make(Input::all(), $rules);

if ($validator->fails())
{
    // return error
}
else
{
    // continue
}

谢谢。

Answer 1

是的，我们可以通过在规则数组上使用条件语句。

$rules 是一个数组，我们传递给验证类或在 Request 类中定义。

示例#1:

public function rules{
    //here we return an array of rules like shown below.
   return [
       'field_a'  => 'required',
       'field_b' => 'required',
   ];
//we can add any operator by a little change.
 save validation rules array in variable like shown below.
 $rules = [
      'field_a' => 'required',
      'field_b' => 'required',
 ];

 //now we can add any rule in $rules array using common ways of writing conditional statements.

//For example field_c is required only when field_a is present and field_b is not
     if(isset($this->field_a) && !isset($this->field_b)){
         $rules['field_c' => 'required'];
     }
   //we can apply any kind of conditional statement and add or remove validation rules on the basis of our business logic.
}

示例#2

public function rules(){

    $rules = [];

    if ($this->attributes->has('some-key')) {
         $rules['other-key'] = 'required|unique|etc';
    }

    if ($this->attributes->get('some-key') == 'some-value') {
          $rules['my-key'] = 'in:a,b,c';
    }

    if ($this->attributes->get('some-key') == 'some-value') {
        $this->attributes->set('key', 'value');
    }

    return $rules;
}