In this chapter, we will cover the following topics:

• Defining model methods and using the API decorators
• Reporting errors to the user
• Obtaining an empty recordset for a different model
• Creating new records
• Updating values of recordset records
• Searching for records
• Combining recordsets
• Filtering recordsets
• Traversing recordset relations
• Extending the business logic defined in a Model
• Extending write() and create()
• Customizing how records are searched