sfPropelVersionableBehaviorPlugin plugin
The sfPropelVersionableBehaviorPlugin is a symfony plugin that provides versioning capabilities to any Propel object.
Features
- Fully unit tested
- Revert objects to previous versions easily
Installation
Install the plugin
symfony plugin-install http://plugins.symfony-project.com/sfPropelVersionableBehaviorPlugin
Enable Propel behavior support in propel.ini:
propel.builder.AddBehaviors = true
Add necessary fields to your model :
<column name="uuid" type="CHAR" size="36" required="true" />
<column name="version" type="INTEGER" size="11" required="true" />
Add foreign key between resource and version history. Edit plugin's schema.xml and enter valid values for foreignTable and foreign attributes
<foreign-key foreignTable="Article" name="has_versions" onDelete="cascade">
<reference local="resource_uuid" foreign="uuid"/>
</foreign-key>
Rebuild your database and model (the plugin uses to tables to store object version history)
symfony propel-build-all
Enable the behavior for one of your Propel model:
// lib/model/Article.php
class Article
{
}
$columns_map = array('uuid' => ArticlePeer::UUID
'version' => ArticlePeer::VERSION);
sfPropelBehavior::add('Article', array('versionable' => array('columns' => $columns_map)));
Column map values signification :
- uuid : Model column holding resource's universally unique identifier (behavior takes care of generating these)
- version : Model column holding resource's current version number
Usage
Reverting to a previous version
$article = new Article();
$article->setTitle('First version of article');
$article->save(); // $article->getVersion() == 1
$article->setTitle('Second version of article');
$article->save(); //$article->getVersion() == 2
$article->toVersion(1); // $article->getTitle() == 'First version of article'
$article->save(); // $article->getVersion() == 3
Retrieving a resource version history
foreach ($article->getAllVersions() as $version)
{
$history_article = $version->getResourceInstance();
echo sprintf("Version %d title : %s\n",
$history_article->getVersion(),
$history_article->getTitle());
}
/*
* Outputs :
*
* Version 1 title : First version of article
* Version 2 title : Second version of article
* Version 3 title : First version of article
*/
Conditional versioning
You may not want to have a new version of resource created each time it is saved.
Just add a versionConditionMet() method to your stub class. It is called each time object's save().
No version is created if it returns false.
Example :
// lib/model/Article.php
public function versionConditionMet()
{
return $this->getTitle() != 'do not version me';
}
[php]
$article = new Article();
$article->setTitle('New article');
$article->save(); // article is saved and a new version is created
$article->setTitle('do not version me');
$article->save(); // article is saved, no new version is created
It is possible to specify a different versionConditionMet() method name by defining it when registring behavior :
sfPropelBehavior::add('Article', array('versionable' => array('columns' => $columns_map, 'conditional' => 'myMethod')));
Public API
Enabling the behaviors adds / modifies the following method to the Propel objects :
void save() : Adds a new version to resource's version historyvoid delete() : Deletes resource's version historyvoid toVersion(integer $version_number) : Populates resource properties with values from the requested versionResourceVersion getLastVersion() : Returns resource's last versionarray getAllVersions() : Returns each resource version in an array
!ResourceVersion class API :
BaseObject getResourceInstance() : returns resource instance populated with attributes from the version
Changelog
2007-02-17 | 0.2.0
- made version number management more reliable
- new
getLastVersion() method
- implemented conditional versioning
- updated docs and unit tests accordingly
2007-02-17 | 0.1.0
Initial public release.
Tristan Rivoallan 