Docs for Sphinx extension updated

extensions/sphinx/Query.php

@@ -27,7 +27,7 @@ use yii\db\QueryTrait;
  *
  * ~~~
  * $query = new Query;
- * $query->select('id, groupd_id')
+ * $query->select('id, group_id')
  *     ->from('idx_item')
  *     ->limit(10);
  * // build and execute the query

extensions/sphinx/README.md

@@ -2,6 +2,7 @@ Sphinx Extension for Yii 2
 ==========================
 
 This extension adds [Sphinx](http://sphinxsearch.com/docs) full text search engine extension for the Yii 2 framework.
+It supports all Sphinx features including [Runtime Indexes](http://sphinxsearch.com/docs/current.html#rt-indexes).
 
 
 Installation
@@ -24,8 +25,8 @@ or add
 to the require section of your composer.json.
 
 
-Usage & Documentation
+Configuration
----------------------
+-------------
 
 This extension interacts with Sphinx search daemon using MySQL protocol and [SphinxQL](http://sphinxsearch.com/docs/current.html#sphinxql) query language.
 In order to setup Sphinx "searchd" to support MySQL protocol following configuration should be added:
@@ -38,10 +39,6 @@ searchd
 }
 ```
 
-This extension supports all Sphinx features including [Runtime Indexes](http://sphinxsearch.com/docs/current.html#rt-indexes).
-Since this extension uses MySQL protocol to access Sphinx, it shares base approach and much code from the
-regular "yii\db" package.
-
 To use this extension, simply add the following code in your application configuration:
 
 ```php
@@ -58,6 +55,80 @@ return [
 ];
 ```
 
+
+Basic Usage
+-----------
+
+Since this extension uses MySQL protocol to access Sphinx, it shares base approach and much code from the
+regular "yii\db" package. Running SphinxQL queries a very similar to regular SQL ones:
+
+```php
+$sql = 'SELECT * FROM idx_item WHERE group_id = :group_id';
+$params = [
+    'group_id' => 17
+];
+$rows = Yii::$app->sphinx->createCommand($sql, $params)->queryAll();
+```
+
+You can also use a Query Builder:
+
+```php
+use yii\sphinx\Query;
+
+$query = new Query;
+$rows = $query->select('id, price')
+    ->from('idx_item')
+    ->andWhere(['group_id' => 1])
+    ->all();
+```
+
+> Note: Sphinx limits the number of records returned by any query to 10 records by default.
+  If you need to get more records you should specify limit explicitly.
+
+
+Composing 'MATCH' statement
+---------------------------
+
+Sphinx usage does not make sense unless you are using its fulltext search ability.
+In SphinxSQL it is provided via 'MATCH' statement. You can always compose it manually as a part of the 'where'
+condition, but if you are using `yii\sphinx\Query` you can do it via `yii\sphinx\Query::match()`:
+
+```php
+use yii\sphinx\Query;
+
+$query = new Query;
+$rows = $query->from('idx_item')
+    ->match($_POST['search'])
+    ->all();
+```
+
+Please note that Sphinx 'MATCH' statement argument uses complex internal syntax for better tuning.
+By default `yii\sphinx\Query::match()` will escape all special characters related to this syntax from
+its argument. So if you wish to use complex 'MATCH' statement, you should use `yii\db\Expression` for it:
+
+```php
+use yii\sphinx\Query;
+use yii\db\Expression;
+
+$query = new Query;
+$rows = $query->from('idx_item')
+    ->match(new Expression(':match', ['match' => '@(content) ' . Yii::$app->sphinx->escapeMatchValue($_POST['search'])]))
+    ->all();
+```
+
+> Note: if you compose 'MATCH' argument, make sure to use `yii\sphinx\Connection::escapeMatchValue()` to properly
+  escape any special characters, which may break the query.
+
+
+Snippets
+--------
+
+TODO
+
+
+Using the ActiveRecord
+----------------------
+
 This extension provides ActiveRecord solution similar ot the [[\yii\db\ActiveRecord]].
 To declare an ActiveRecord class you need to extend [[\yii\sphinx\ActiveRecord]] and
 implement the `indexName` method:
@@ -77,6 +148,10 @@ class Article extends ActiveRecord
 }
 ```
 
+
+Working with data providers
+---------------------------
+
 You can use [[\yii\data\ActiveDataProvider]] with the [[\yii\sphinx\Query]] and [[\yii\sphinx\ActiveQuery]]:
 
 ```php