Merge pull request #4 from screeper/master

Added update "column = !column"

MysqliDb.php

@@ -477,6 +477,10 @@ class MysqliDb
                                 }
                             }
                             break;
+                        case '[N]':
+			    if($val == null) $this->_query .= "!" . $column . ", ";
+			    else $this->_query .= "!" . $val . ", ";
+			    break;
                         default:
                             die ("Wrong operation");
                     }
@@ -754,6 +758,14 @@ class MysqliDb
         return Array ("[I]" => "-" . (int)$num);
     }
     
+    /**
+     * Method generates change boolean function call
+     * @param string column name. null by default
+     */
+    public function not ($col = null) {
+        return Array ("[N]" => (string)$col);
+    }
+
     /**
      * Method generates user defined function call
      * @param string user function body

readme.md

@@ -49,8 +49,10 @@ if($id)
 $data = Array (
 	'firstName' => 'Bobby',
 	'lastName' => 'Tables',
-	'editCount' => $db->inc(2)
+	'editCount' => $db->inc(2),
 	// editCount = editCount + 2;
+	'editBoolean' => $db->not()
+	// editBoolean = !editBoolean;
 );
 $db->where('id', 1);
 if($db->update('users', $data)) echo 'successfully updated';