Using django-localflavor to validate form fields

django-localflavor is a third-party module that contains a collection of utilities, such as form fields or model fields, that are specific for each country. It’s very useful for validating local regions, local phone numbers, identity card numbers, social security numbers, and so on. The package is organized into a series of modules named after ISO 3166 country codes. Follow these instructions to set it up:

Install django-localflavor using the following command:

python -m pip install django-localflavor==4.0

Edit the settings.py file of your project and add localflavor to the INSTALLED_APPS setting, as follows:

INSTALLED_APPS = [
    # ...
    'localflavor',
]

You are going to add the United States zip code field so that a valid United States zip code is required to create a new order. Edit the forms.py file of the orders application and make it look like the following:

from django import forms...