Odoo 12 Development Essentials - Fourth Edition

Summary

Extensibility is a key feature of the Odoo framework. We can build add-on modules that change or add features to other existing add-ons at the several layers needed to implement features in Odoo.

At the Model layer, we use the _inherit Model attribute to get a reference to an existing Model and then perform in-place modifications on  it. The field objects inside the Model also support incremental definitions so that we can re-declare an existing field, providing only the attributes to change.

Additional Model inheritance mechanisms allow you to reuse data structures and business logic. The Delegation inheritance, activated with a delegate=True attribute on a many-to-one relation field (or the old style inherits Model attribute), makes ...