improved documentation about loadDefaultValues()

docs/guide/db-active-record.md

@@ -322,8 +322,8 @@ if ($model->load(Yii::$app->request->post()) && $model->save()) {
 ### Loading Default Values
 
 Your table columns may be defined with default values. Sometimes, you may want to pre-populate your
-Web form for an Active Record with these values. To do so, call the `loadDefaultValues()` method before
-rendering the form:
+Web form for an Active Record with these values. To do so, call the
+[[yii\db\ActiveRecord::loadDefaultValues()|loadDefaultValues()]] method before rendering the form:
 
 ```php
 $customer = new Customer();

framework/db/ActiveRecord.php

@@ -100,8 +100,19 @@ class ActiveRecord extends BaseActiveRecord
     /**
      * Loads default values from database table schema
      *
-     * @param boolean $skipIfSet if existing value should be preserved
-     * @return static model instance
+     * To enable loading defaults for every newly created record, you can add a call to this method to [[init()]]:
+     *
+     * ```php
+     * public function init()
+     * {
+     *     parent::init();
+     *     $this->loadDefaultValues();
+     * }
+     * ```
+     *
+     * @param boolean $skipIfSet whether existing value should be preserved.
+     * This will only set defaults for attributes that are `null`.
+     * @return static the model instance itself.
      */
     public function loadDefaultValues($skipIfSet = true)
     {