Book Image

Odoo Development Cookbook

By : Holger Brunn, Alexandre Fayolle, Daniel Reis
Book Image

Odoo Development Cookbook

By: Holger Brunn, Alexandre Fayolle, Daniel Reis

Overview of this book

Odoo is a full-featured open source ERP with a focus on extensibility. The flexibility and sustainability of open source is also a key selling point of Odoo. It is built on a powerful framework for rapid application development, both for back-end applications and front-end websites. The book starts by covering Odoo installation and administration, and provides a gentle introduction to application development. It then dives deep into several of the areas that an experienced developer will need to use. You’ll learn implement business logic, adapt the UI, and extend existing features.
Table of Contents (23 chapters)
Odoo Development Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Addon updates and data migration


The data model you choose when writing an addon might turn out to have some weaknesses, so you may need to adjust it during the life cycle of your addon. In order to allow that without a lot of hacks, Odoo supports versioning in addons and running migrations if necessary.

How to do it...

We assume that in an earlier version of our module, the date_release field was a character field, where people wrote whatever they saw fit as the date. Now we realize we need this field for comparisons and aggregations, which is why we want to change its type to Date. Odoo does a great job at type conversions, but, in this case, we're on our own, which is why we need to provide instructions on how to transform a database with the previous version of our module installed to a database where the current version can run:

  1. Bump the version in your __openerp__.py manifest:

        'version': '9.0.1.0.1',
  2. Provide pre-migration code in migrations/9.0.1.0.1/pre-migrate.py:

    def migrate(cr, version...