Book Image

Odoo 14 Development Cookbook - Fourth Edition

By : Gajjar, Fayolle, Holger Brunn, Daniel Reis
5 (2)
Book Image

Odoo 14 Development Cookbook - Fourth Edition

5 (2)
By: Gajjar, Fayolle, Holger Brunn, Daniel Reis

Overview of this book

With its latest iteration, the powerful Odoo framework released a wide variety of features for rapid application development. This updated Odoo development cookbook will help you explore the new features in Odoo 14 and learn how to use them to develop Odoo applications from scratch. You'll learn about the new website concepts in Odoo 14 and get a glimpse of Odoo's new web-client framework, the Odoo Web Library (OWL). Once you've completed the installation, you'll begin to explore the Odoo framework with real-world examples. You'll then create a new Odoo module from the ground up and progress to advanced framework concepts. You'll also learn how to modify existing applications, including Point of Sale (POS) applications. This book isn't just limited to backend development; you'll discover advanced JavaScript recipes for creating new views and widgets. As you progress, you'll learn about website development and become a quality Odoo developer by studying performance optimization, debugging, and automated testing. Finally, you'll delve into advanced concepts such as multi-website, In-App Purchasing (IAP), Odoo.sh, the IoT Box, and security. By the end of the book, you'll have all the knowledge you need to build impressive Odoo applications and you'll be well versed in development best practices that will come in handy when working with the Odoo framework.
Table of Contents (26 chapters)

Adding computed fields to a model

Sometimes, we need to have a field that has a value calculated or derived from other fields in the same record or in related records. A typical example is the total amount, which is calculated by multiplying a unit price by a quantity. In Odoo models, this can be achieved using computed fields.

To show you how computed fields work, we will add one to the Library Books model to calculate the days since the book's release date.

It is also possible to make computed fields editable and searchable. We will implement this to our example as well.

Getting ready

We will continue using the my_library add-on module from the previous recipe.

How to do it...

We will edit the models/library_book.py code file to add a new field and the methods supporting its logic:

  1. Start by adding the new field to the Library Books model:
    class LibraryBook(models.Model): 
        # ... 
        age_days = fields.Float...