dbObject: added JsonBuilder()

Author: avbdr

dbObject.md

@@ -239,7 +239,7 @@ Second parameter is 'required' and its defines that following entry field be alw
 
 NOTE: All variables which are not defined in the $dbFields array will be ignored from insert/update statement.
 
-###Array as return values
+###Using array as a return value
 dbObject can return its data as array instead of object. To do that ArrayBuilder() function should be used in the beginning of the call.
 ```php
     $user = user::ArrayBuilder()->byId (1);
@@ -251,11 +251,16 @@ dbObject can return its data as array instead of object. To do that ArrayBuilder
 ```
 
 Following call will return data only of the called instance without any relations data. Use with() function to include relation data as well.
-
 ```php
     $user = user::ArrayBuilder()->with ("product")->byId (1);
     print_r ($user['products']);
 ```
+
+###Using json as a return value
+Togeather with ArrayBuilder() and ObjectBuilder() dbObject can return result in json format to avoid extra coding
+```php
+    $userjson = user::JsonBuilder()->with ("product")->byId (1);
+```
 ###Object serialization
 
 Object could be easily converted to a json string or an array.

dbObject.php

@@ -170,6 +170,16 @@ public function __unset ($name) {
         unset ($this->data[$name]);
     }
 
+    /**
+     * Helper function to create dbObject with Json return type
+     *
+     * @return dbObject
+     */
+    public static function JsonBuilder () {
+        $obj = new static;
+        $obj->returnType = 'Json';
+        return $obj;
+    }
 
     /**
      * Helper function to create dbObject with Array return type
@@ -299,6 +309,8 @@ private function getOne ($fields = null) {
         $this->processArrays ($results);
         $this->data = $results;
         $this->processWith ($results);
+        if ($this->returnType == 'Json')
+            return json_encode ($results);
         if ($this->returnType == 'Array')
             return $results;
 
@@ -334,6 +346,9 @@ private function get ($limit = null, $fields = null) {
         if ($this->returnType == 'Object')
             return $objects;
 
+        if ($this->returnType == 'Json')
+            return json_encode ($results);
+
         return $results;
     }