minor fixes.

framework/base/Application.php

@@ -124,6 +124,10 @@ abstract class Application extends Module
      *     'name' => 'extension name',
      *     'version' => 'version number',
      *     'bootstrap' => 'BootstrapClassName',
+     *     'alias' => [
+     *         '@alias1' => 'to/path1',
+     *         '@alias2' => 'to/path2',
+     *     ],
      * ]
      * ~~~
      */

framework/db/ActiveRecord.php

@@ -8,6 +8,7 @@
 
 namespace yii\db;
 
+use Yii;
 use yii\base\InvalidConfigException;
 use yii\helpers\Inflector;
 use yii\helpers\StringHelper;
@@ -376,6 +377,7 @@ class ActiveRecord extends BaseActiveRecord
     public function insert($runValidation = true, $attributes = null)
     {
         if ($runValidation && !$this->validate($attributes)) {
+            Yii::info('Model not inserted due to validation error.', __METHOD__);
             return false;
         }
         $db = static::getDb();
@@ -493,6 +495,7 @@ class ActiveRecord extends BaseActiveRecord
     public function update($runValidation = true, $attributes = null)
     {
         if ($runValidation && !$this->validate($attributes)) {
+            Yii::info('Model not updated due to validation error.', __METHOD__);
             return false;
         }
         $db = static::getDb();