Summary
In this chapter, we explored the various features of the ORM API and how to use them to create dynamic applications that react to users, which helps them avoid errors and automate tedious tasks.
The model validations and computed fields can cover a lot of use cases, but not all. We learned how to extend the API's create, write, and unlink methods to cover further use cases.
For rich user interaction, we used the mail core add-on mixins to add features for users to communicate about documents and plan activities on them. Wizards allow the application to dialogue with the user and gather the data that's needed to run particular processes. Exceptions allow the application to abort incorrect operations, informing the user of the problem and rolling back intermediate changes, keeping the system consistent.
We also discussed the tools that are available for developers to create and maintain their applications: logging messages, debugging tools, and unit tests.
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