You're reading from Odoo 15 Development Essentials - Fifth Edition

Product type Book

Published in Feb 2022

Publisher Packt

ISBN-13 9781800200067

Pages 548 pages

Edition 5th Edition

Languages

Python

Concepts

Enterprise Resource Planning

Author (1):

Daniel Reis

Table of Contents (22) Chapters

Preface

1. Section 1: Introduction to Odoo Development

2. Chapter 1: Quick Start Using the Developer Mode

3. Chapter 2: Preparing the Development Environment

4. Chapter 3: Your First Odoo Application

5. Chapter 4: Extending Modules

6. Section 2: Models

7. Chapter 5: Importing, Exporting, and Module Data

8. Chapter 6: Models – Structuring the Application Data

9. Section 3: Business Logic

10. Chapter 7: Recordsets – Working with Model Data

11. Chapter 8: Business Logic – Supporting Business Processes

12. Chapter 9: External API – Integrating with Other Systems

13. Section 4: Views

14. Chapter 10: Backend Views – Designing the User Interface

15. Chapter 11: Kanban Views and Client-Side QWeb

16. Chapter 12: Creating Printable PDF Reports with Server-Side QWeb

17. Chapter 13: Creating Web and Portal Frontend Features

18. Section 5: Deployment and Maintenance

19. Chapter 14: Understanding Odoo Built-In Models

20. Chapter 15: Deploying and Maintaining Production Instances

21. Other Books You May Enjoy

Transactions and low-level SQL

ORM methods that are called from a client run in a transaction. Transactions ensure correctness in the case of concurrent writes or failures. During a transaction, the data records used are locked, protecting them from other concurrent transactions and ensuring that they are not unexpectedly changed. In case of failure, all the transaction changes are rolled back, returning to the initial state.

Transaction support is provided by the PostgreSQL database. When an ORM method is called from a client, a new transaction is initiated. If an error occurs during the method execution, any changes that have been made are reverted. If the method execution completes with no errors, then the changes made are committed, making them effective and visible to all other transactions.

This is automatically handled for us, and we usually don't need to worry about it. However, in some advanced use cases, it might be useful to have control over the current transaction...