Add prohibited validation rule (#36667)

Author: PhiloNL

src/Illuminate/Validation/Concerns/ValidatesAttributes.php

@@ -1434,6 +1434,19 @@ public function validateRequiredIf($attribute, $value, $parameters)
         return true;
     }
 
+    /**
+     * Validate that an attribute does not exist.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @param  mixed  $parameters
+     * @return bool
+     */
+    public function validateProhibited($attribute, $value)
+    {
+        return false;
+    }
+
     /**
      * Validate that an attribute does not exist when another attribute has a given value.
      *

src/Illuminate/Validation/Validator.php

@@ -227,6 +227,7 @@ class Validator implements ValidatorContract
         'RequiredWithAll',
         'RequiredWithout',
         'RequiredWithoutAll',
+        'Prohibited',
         'ProhibitedIf',
         'ProhibitedUnless',
         'Same',

tests/Validation/ValidationValidatorTest.php

@@ -1190,6 +1190,36 @@ public function testRequiredUnless()
         $this->assertSame('The last field is required unless first is in taylor, sven.', $v->messages()->first('last'));
     }
 
+    public function testProhibited()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+
+        $v = new Validator($trans, [], ['name' => 'prohibited']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['last' => 'bar'], ['name' => 'prohibited']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['name' => 'foo'], ['name' => 'prohibited']);
+        $this->assertTrue($v->fails());
+
+        $file = new File('', false);
+        $v = new Validator($trans, ['name' => $file], ['name' => 'prohibited']);
+        $this->assertTrue($v->fails());
+
+        $file = new File(__FILE__, false);
+        $v = new Validator($trans, ['name' => $file], ['name' => 'prohibited']);
+        $this->assertTrue($v->fails());
+
+        $file = new File(__FILE__, false);
+        $file2 = new File(__FILE__, false);
+        $v = new Validator($trans, ['files' => [$file, $file2]], ['files.0' => 'prohibited', 'files.1' => 'prohibited']);
+        $this->assertTrue($v->fails());
+
+        $v = new Validator($trans, ['files' => [$file, $file2]], ['files' => 'prohibited']);
+        $this->assertTrue($v->fails());
+    }
+
     public function testProhibitedIf()
     {
         $trans = $this->getIlluminateArrayTranslator();