public function image() {
		if (Request::hasFile('image') && Request::has('table_name') && Request::has('field_name')) {
			return json_encode(self::saveImage(
				Request::input('table_name'), 
				Request::input('field_name'), 
				Request::file('image'),
				null,
				Request::file('image')->getClientOriginalExtension()
			));
		} elseif (!Request::hasFile('image')) {
			return 'no image';
		} elseif (!Request::hasFile('table_name')) {
			return 'no table_name';
		} elseif (!Request::hasFile('field_name')) {
			return 'no field_name';
		}
	}