Book Image

Odoo 15 Development Essentials - Fifth Edition

By : Daniel Reis
4.5 (2)
Book Image

Odoo 15 Development Essentials - Fifth Edition

4.5 (2)
By: Daniel Reis

Overview of this book

Odoo is fast becoming the reference open source platform for business applications thanks to the fact that it provides the infrastructure needed for developers to deliver software solutions for any business process quickly. Odoo's layered module approach makes it particularly effective for combining and extending features. This updated fifth edition is a tutorial-style introduction to essential Odoo development topics. The book starts by covering the development essentials for building business applications and takes you through Odoo installation and configuration, gradually transitioning from having no specific knowledge of Odoo to being ready for application development. You'll then learn how to develop your first Odoo application, while covering topics such as models and views. Later chapters will get you up to speed with using server APIs to add business logic, helping you lay a solid foundation for advanced topics. As you progress, you’ll get equipped to build and customize your applications and explore the new features available in Odoo 12 and beyond, such as in-memory ORM and computed writable fields. Finally, you’ll gain insights into building business logic and using the Odoo API to integrate with various applications. By the end of this book, you’ll be able to build business apps from scratch using the latest version of Odoo.
Table of Contents (22 chapters)
1
Section 1: Introduction to Odoo Development
6
Section 2: Models
9
Section 3: Business Logic
13
Section 4: Views
18
Section 5: Deployment and Maintenance

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...