books/models

Models

The models root folder contains all the model files, i.e. files containing all the models. Models here, refers to the classes that handle the data, its validation and updation and a bunch of other stuff.

Each model directly or indirectly extends the Doc class from frappe/model/doc.ts so for more info check that file and the associated types in frappe/model/types.ts.

A model class can used even if the class body has no content, for example PurchaseInvoiceItem. Else the model used will default to using Doc. The class can also be used to provide type information for the field types else they default to the catch all DocValue example:

class Todo extends Doc {
  title?: string;
  date?: Date;
  completed?: boolean;
}

While this has obvious advantages, the drawback is if the underlying fieldtype changes this too will have to be changed.

The data stored by the models is decided by the schema passed to it's constructor. Check schemas/README.md for info on this.

Adding Stuff

When adding stuff to models/** make sure that it isn't importing any Vue code or other frontend specific code globally. This is cause model file tests will directly use the the Frappe class and will be run using mocha on node.

Importing frontend code will break all the tests. This also implies that one should be wary about transitive dependencies.

Note: Frontend specific code can be imported but they should be done so, only using dynamic imports i.e. await import('...').

Regional Models

Regional models should as far as possible extend the base model and override what's required.

They should then be imported dynamicall and returned from getRegionalModels in models/index.ts on the basis of countryCode.