Fixes #2022: Added info about yii\db\Query::andFilterCompare() to guide

docs/guide/db-query-builder.md

@@ -351,6 +351,20 @@ Like [[yii\db\Query::andWhere()|andWhere()]] and [[yii\db\Query::orWhere()|orWhe
 [[yii\db\Query::andFilterWhere()|andFilterWhere()]] and [[yii\db\Query::orFilterWhere()|orFilterWhere()]]
 to append additional filter conditions to the existing one.
 
+Additionally, there is [[yii\db\Query::andFilterCompare()]] that can intelligently determine operator based on what's
+in the value:
+
+```php
+$query->andFilterCompare('name', 'John Doe');
+$query->andFilterCompare('rating', '>9');
+$query->andFilterCompare('value', '<=100');
+```
+
+You can also specify operator explicitly:
+
+```php
+$query->andFilterCompare('name', 'Doe', 'like');
+```
 
 ### [[yii\db\Query::orderBy()|orderBy()]] <span id="order-by"></span>
 

docs/guide/output-data-widgets.md

@@ -395,9 +395,11 @@ class PostSearch extends Post
         return $dataProvider;
     }
 }
-
 ```
 
+> Tip: See [Query Builder](db-query-builder.md) and especially [Filter Conditions](db-query-builder.md#filter-conditions)
+> to learn how to build filtering query.
+
 You can use this function in the controller to get the dataProvider for the GridView:
 
 ```php