Form asset bundle registering code moved from ActiveForm::run() to the *Validator::clientValidateAttribute().

yii/validators/BooleanValidator.php

@@ -102,6 +102,7 @@ class BooleanValidator extends Validator
 			$options['strict'] = 1;
 		}
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.boolean(value, messages, ' . json_encode($options) . ');';
 	}
 }

yii/validators/CaptchaValidator.php

@@ -113,6 +113,7 @@ class CaptchaValidator extends Validator
 			$options['skipOnEmpty'] = 1;
 		}
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.captcha(value, messages, ' . json_encode($options) . ');';
 	}
 }

yii/validators/CompareValidator.php

@@ -205,6 +205,7 @@ class CompareValidator extends Validator
 			'{compareValue}' => $compareValue,
 		)));
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.compare(value, messages, ' . json_encode($options) . ');';
 	}
 }

yii/validators/EmailValidator.php

@@ -119,10 +119,6 @@ class EmailValidator extends Validator
 	 */
 	public function clientValidateAttribute($object, $attribute, $view)
 	{
-		if ($this->enableIDN) {
-			$view->registerAssetBundle('punycode');
-		}
-
 		$options = array(
 			'pattern' => new JsExpression($this->pattern),
 			'fullPattern' => new JsExpression($this->fullPattern),
@@ -137,6 +133,10 @@ class EmailValidator extends Validator
 			$options['skipOnEmpty'] = 1;
 		}
 
+		$view->registerAssetBundle('yii/form');
+		if ($this->enableIDN) {
+			$view->registerAssetBundle('punycode');
+		}
 		return 'yii.validation.email(value, messages, ' . Json::encode($options) . ');';
 	}
 }

yii/validators/NumberValidator.php

@@ -151,6 +151,7 @@ class NumberValidator extends Validator
 			$options['skipOnEmpty'] = 1;
 		}
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.number(value, messages, ' . Json::encode($options) . ');';
 	}
 }

yii/validators/RangeValidator.php

@@ -103,6 +103,7 @@ class RangeValidator extends Validator
 			$options['skipOnEmpty'] = 1;
 		}
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.range(value, messages, ' . json_encode($options) . ');';
 	}
 }

yii/validators/RegularExpressionValidator.php

@@ -112,6 +112,7 @@ class RegularExpressionValidator extends Validator
 			$options['skipOnEmpty'] = 1;
 		}
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.regularExpression(value, messages, ' . Json::encode($options) . ');';
 	}
 }

yii/validators/RequiredValidator.php

@@ -126,6 +126,7 @@ class RequiredValidator extends Validator
 			'{value}' => $object->$attribute,
 		)));
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.required(value, messages, ' . json_encode($options) . ');';
 	}
 }

yii/validators/StringValidator.php

@@ -170,6 +170,7 @@ class StringValidator extends Validator
 			$options['skipOnEmpty'] = 1;
 		}
 
+		$view->registerAssetBundle('yii/form');
 		return 'yii.validation.string(value, messages, ' . json_encode($options) . ');';
 	}
 }

yii/validators/UrlValidator.php

@@ -117,10 +117,6 @@ class UrlValidator extends Validator
 	 */
 	public function clientValidateAttribute($object, $attribute, $view)
 	{
-		if ($this->enableIDN) {
-			$view->registerAssetBundle('punycode');
-		}
-
 		if (strpos($this->pattern, '{schemes}') !== false) {
 			$pattern = str_replace('{schemes}', '(' . implode('|', $this->validSchemes) . ')', $this->pattern);
 		} else {
@@ -142,6 +138,10 @@ class UrlValidator extends Validator
 			$options['defaultScheme'] = $this->defaultScheme;
 		}
 
+		$view->registerAssetBundle('yii/form');
+		if ($this->enableIDN) {
+			$view->registerAssetBundle('punycode');
+		}
 		return 'yii.validation.url(value, messages, ' . Json::encode($options) . ');';
 	}
 }

yii/widgets/ActiveForm.php

@@ -134,7 +134,6 @@ class ActiveForm extends Widget
 			$id = $this->options['id'];
 			$options = Json::encode($this->getClientOptions());
 			$attributes = Json::encode($this->attributes);
-			$this->view->registerAssetBundle('yii/form');
 			$this->view->registerJs("jQuery('#$id').yiiActiveForm($attributes, $options);");
 		}
 		echo Html::endForm();