#web-framework

We just upgraded the core nereid module (the web framework) to Tryton 2.6 which uses the Active Record design pattern. The migration was easy since we had the wonderful guidelines written by Cedric Krier. Just as how the guidelines help in migrating tryton modules to 2.6, I hope this post helps in migrating nereid modules to 2.6.

1. Restful URLs

The 'methods' selection field was due for deprecation and has been removed. If you are migrating to 2.6.x from any version after 2.4.0.6 you should not face any issues with migration as the selection field is automatically migrated into the new format.

https://gist.github.com/4587773

Remember that prior to this version, the GET HTTP method was allowed by default (implicit), but the new design disallows all HTTP methods by default. So to achieve the same behavior as 2.4, you will have to explicitly enable the GET method.

https://gist.github.com/4587930

2. Active record pattern: Tryton 2.6 introduces the active record pattern and the model controllers which work on more than one record are class or static methods while the methods which act on a single record happen to be regular instance methods. The convention is extended to nereid too: If the handler works outside the context of a single active record, use static or class methods depending on whether your method delegates/uses other methods in the class. If not stick to an instance method. When you use an instance method, tryton expects the instance to be the active record itself and nereid allows you to do this again by convention. Just ensure that your url has an integer converter which generates a keyword argument 'active_id'. Example:

https://gist.github.com/4588022

Happy Hacking !!