added Order, Limit, Skip methods to MongoStatement

model/DbStatement.php

@@ -88,18 +88,6 @@ abstract class DbStatement
         return false;
     }
     
-    /**
-     * @return array
-     */
-    public function fetchPairs()
-    {
-        $data = array();
-        while ($row = $this->fetch(Db::FETCH_NUM)) {
-            $data[$row[0]] = $row[1];
-        }
-        return $data;
-    }
-    
     /* Abstract methods */
 
     abstract public function bindParam($param, &$value);

model/MongoStatement.php

@@ -14,6 +14,36 @@
 class MongoStatement extends DbStatement
 {
 
+    public  function order($sort = array())
+    {
+        if ($this->result instanceof MongoCursor) {
+            $this->result->sort($sort);
+            return $this;
+        } else {
+            throw new Exception('MongoStatement error. Impossible order results of opened cursor.');
+        }
+    }
+
+    public function skip($skip = 0)
+    {
+        if ($this->result instanceof MongoCursor) {
+            $this->result->skip($skip);
+            return $this;
+        } else {
+            throw new Exception('MongoStatement error. Impossible skip results of opened cursor.');
+        }
+    }
+
+    public function limit($limit = 0)
+    {
+        if ($this->result instanceof MongoCursor) {
+            $this->result->limit($limit);
+            return $this;
+        } else {
+            throw new Exception('MongoStatement error. Impossible limit results of opened cursor.');
+        }
+    }
+
     public function fetch($style = Db::FETCH_OBJ)
     {
         if (!$this->result) {

model/MySQLiStatement.php

@@ -117,6 +117,18 @@ class MySQLiStatement extends DbStatement
     {
         return $this->result->fetch_object($class);
     }
+
+    /**
+     * @return array
+     */
+    public function fetchPairs()
+    {
+        $data = array();
+        while ($row = $this->fetch(Db::FETCH_NUM)) {
+            $data[$row[0]] = $row[1];
+        }
+        return $data;
+    }
     
     public function close()
     {