Django User model, adding function

You can add a method to the User

from django.contrib import authauth.models.User.add_to_class('get_related_foo_models', get_related_foo_models)

Make sure, you have this code within the models.py or some other file which gets imported in the startup of django.

This is an update of @Lakshman Prasad's answer. But a full example:

create a file monkey_patching.py in any of your apps::

#app/monkey_patching.pyfrom django.contrib.auth.models import User def get_user_name(self):    if self.first_name or self.last_name:        return self.first_name + " " + self.last_name    return self.usernameUser.add_to_class("get_user_name",get_user_name)

and import it in app's __init__.py file. ie::

#app/__init__.pyimport monkey_patching

It's not unusual to substitute user model as it is stated in the docs: https://docs.djangoproject.com/es/1.9/topics/auth/customizing/#substituting-a-custom-user-model, so, having this into account, it is better to get the user model class with the following code:

from django.contrib.auth import get_user_modelUserModel = get_user_model()

Afterwards, you can use this UserModel to add functionality as @Lakshman Prasad suggests: UserModel.add_to_class('get_related_foo_models', get_related_foo_models).

In order to get the code executed only once I prefer to use Django application config classes (https://docs.djangoproject.com/es/1.9/ref/applications/), so a full working example will be:

# myapp/__init__.pydefault_app_config = 'myapp.apps.MyAppConfig'# myapp/apps.pyfrom django.apps import AppConfigfrom django.contrib.auth import get_user_modelclass MyAppConfig(AppConfig):    name = 'myapp'    verbose_name = 'MyApp'    def ready(self):        # Add some functions to user model:        def custom_function(self):            # Do whatsoever            pass        UserModel = get_user_model()        UserModel.add_to_class('custom_function', custom_function)