Book Image

Odoo 12 Development Essentials - Fourth Edition

By : Daniel Reis
Book Image

Odoo 12 Development Essentials - Fourth Edition

By: Daniel Reis

Overview of this book

Odoo is one of the best platforms for open source ERP and CRM. Its latest version, Odoo 12, brings with it new features and updates in Python packages to develop more customizable applications with additional cloud capabilities. The book begins by covering the development essentials for building business applications. You will start your journey by learning how to install and configure Odoo, and then transition from having no specific knowledge of Odoo to being ready for application development. You will develop your first Odoo application and understand topics such as models and views. Odoo 12 Development Essentials will also guide you in using server APIs to add business logic, helping you lay a solid foundation for advanced topics. As you progress through the chapters, you will be equipped to build and customize your applications and explore the new features in Odoo 12, such as cloud integration, to scale your business applications. You will get insights into building business logic and integrating various APIs into your application. By the end of the book, you will be able to build a business application from scratch by using the latest version of Odoo.
Table of Contents (22 chapters)
Title Page
Packt Upsell
Foreword
Contributors
Preface
Index

Relationships between models


Non-trivial business application have a structured data model, and need to relate the data from the different entities involved. To do this, we need to use relational fields.

Looking again at our Library app, in the book model we can see the following relationships:

  • Each book can have one publisher. This is a many-to-one relationship, implemented in the database engine as a foreign key. The inverse is a one-to-many relationship, meaning that each publisher can have many books.
  • Each book can have many authors. That's a many-to-many relationship. The inverse relationship is also a many-to-many, since each author can have many books.

We will explore each of these relationships in the next sections.

A particular case is hierarchical relationships, where records in a Model are related to other records in the same Model. We will introduce a book category model to explain that case.

Finally, the Odoo framework also supports flexible relationships, where a field is able to...