fixed serialization to serialize datetime fields as strings instead o…

…f the actual DateTime objects. important format change for anyone using serialized datetime fields

DateTime fields were previously being serialized like below which was not the intention:

"created_at":{"date":"2010-05-18 23:25:10","timezone_type":2,"timezone":"EDT"}

It will now be serialized to a string like so:

"created_at":"2010-05-18T23:26:26-0400"

The default format is ISO8601 but this can be changed. See http://github.com/kla/php-activerecord/commit/faef7a853870d3efa3e7dce48a256f46478a630d for details

lib/Serialization.php

@@ -233,7 +233,7 @@ class JsonSerializer extends Serialization
 
 	public function to_s()
 	{
-		return json_encode(self::$include_root ? array(strtolower(get_class($this->model)) => $this->attributes) : $this->attributes);
+		return json_encode(self::$include_root ? array(strtolower(get_class($this->model)) => $this->to_a()) : $this->to_a());
 	}
 }
 
@@ -263,7 +263,7 @@ private function xml_encode()
 		$this->writer->openMemory();
 		$this->writer->startDocument('1.0', 'UTF-8');
 		$this->writer->startElement(strtolower(denamespace(($this->model))));
-		$this->write($this->attributes);
+		$this->write($this->to_a());
 		$this->writer->endElement();
 		$this->writer->endDocument();
 		$xml = $this->writer->outputMemory(true);
@@ -299,4 +299,4 @@ private function write($data, $tag=null)
 		}
 	}
 }
-?>
+?>

test/SerializationTest.php

@@ -126,7 +126,8 @@ public function test_to_xml()
 	public function test_to_xml_works_with_datetime()
 	{
 		Author::find(1)->update_attribute('created_at',new DateTime());
-		$this->assert_reg_exp('/<updated_at><date>/',Author::find(1)->to_xml());
+		$this->assert_reg_exp('/<updated_at>[0-9]{4}-[0-9]{2}-[0-9]{2}/',Author::find(1)->to_xml());
+		$this->assert_reg_exp('/"updated_at":"[0-9]{4}-[0-9]{2}-[0-9]{2}/',Author::find(1)->to_json());
 	}
 
 	public function test_to_xml_skip_instruct()