Never set undefined properties from UpdateTrait.

Author: gwillz

src/UpdateTidyTrait.php

@@ -7,14 +7,10 @@
 namespace karmabunny\kb;
 
 /**
- * This modifies the behaviour of a DataObject/Collection so that only
- * properties defined in the class are updated.
+ * This is functional the same as {@see UpdateTrait} only it uses the
+ * `getProperties()` helper to determine which fields belong to the class.
  *
- * The default implementation will create _new_ fields that aren't typed. This
- * trait will only update fields that are explicitly defined. Unknown fields
- * are silently ignored.
- *
- * For a more aggressive approach {@see UpdateStrictTrait}.
+ * To raise errors on unknown fields {@see UpdateStrictTrait}.
  *
  * @package karmabunny\kb
  */

src/UpdateTrait.php

@@ -9,6 +9,11 @@
 /**
  * This implements basic `update()` behaviour for an object.
  *
+ * Only fields that are defined as properties will be set. Unknown fields
+ * are silently ignored.
+ *
+ * To raise errors on unknown fields {@see UpdateStrictTrait}.
+ *
  * @package karmabunny\kb
  */
 trait UpdateTrait
@@ -21,6 +26,7 @@ trait UpdateTrait
     public function update($config)
     {
         foreach ($config as $key => $item) {
+            if (!property_exists($this, $key)) continue;
             $this->$key = $item;
         }