Extending the business logic defined in a Model

When defining a model that extends another model, it is often necessary to customize the behavior of some methods defined on the original model. This is a very easy task in Odoo, and one of the most powerful features of the underlying framework.

We will demonstrate this by extending a method that creates records to add a new field in the created records.

Getting ready

If you want to follow the recipe, ensure that you have the my_module addon from Chapter 4, Creating Odoo addon Modules, with the loan wizard defined in the Writing a wizard to guide the user recipe from Chapter 9, Advanced Server-Side Development Techniques.

Create a new addon module called library_loan_return_date...