Fixes #2729: Added `FilterValidator::skipOnArray` so that filters like `trim`…

framework/CHANGELOG.md

@@ -143,6 +143,7 @@ Yii Framework 2 Change Log
 - Enh #2646: Added support for specifying hostinfo in the pattern of a URL rule (qiangxue)
 - Enh #2661: Added boolean column type support for SQLite (qiangxue)
 - Enh #2670: Changed `console\Controller::globalOptions()` to `options($actionId)` to (make it possible to) differentiate options per action (hqx)
+- Enh #2729: Added `FilterValidator::skipOnArray` so that filters like `trim` will not fail for array inputs (qiangxue)
 - Enh #2735: Added support for `DateTimeInterface` in `Formatter` (ivokund)
 - Enh: Added support for using arrays as option values for console commands (qiangxue)
 - Enh: Added `favicon.ico` and `robots.txt` to default application templates (samdark)

framework/validators/FilterValidator.php

@@ -40,6 +40,11 @@ class FilterValidator extends Validator
 	 */
 	public $filter;
 	/**
+	 * @var boolean whether the filter should be skipped if an array input is given.
+	 * If false and an array input is given, the filter will not be applied.
+	 */
+	public $skipOnArray = false;
+	/**
 	 * @var boolean this property is overwritten to be false so that this validator will
 	 * be applied when the value being validated is empty.
 	 */
@@ -61,6 +66,9 @@ class FilterValidator extends Validator
 	 */
 	public function validateAttribute($object, $attribute)
 	{
-		$object->$attribute = call_user_func($this->filter, $object->$attribute);
+		$value = $object->$attribute;
+		if ($this->skipOnArray || !is_array($value)) {
+			$object->$attribute = call_user_func($this->filter, $value);
+		}
 	}
 }