GenericIPAddressField – Django Models

12 Feb, 2020
GenericIPAddressField is a field which stores an IPv4 or IPv6 address, in string format (e.g. 192.0.2.30 or 2a02:42fe::4). The default form widget for this field is a TextInput. The IPv6 address normalization follows RFC 4291#section-2.2 section 2.2, including using the IPv4 format suggested in paragraph 3 of that section, like ::ffff:192.0.2.0. For example, 2001:0::0:01 would be normalized to 2001::1, and ::ffff:0a0a:0a0a to ::ffff:10.10.10.10. All characters are converted to lowercase.
Syntax:
field_name = models.GenericIPAddressField(**options)
GenericIPAddressField accepts following arguments :
GenericIPAddressField.protocol
Limits valid inputs to the specified protocol. Accepted values are ‘both‘ (default), ‘IPv4‘ or ‘IPv6‘. Matching is case insensitive.
GenericIPAddressField.unpack_ipv4
Unpacks IPv4 mapped addresses like ::ffff:192.0.2.1. If this option is enabled that address would be unpacked to 192.0.2.1. Default is disabled. Can only be used when protocol is set to ‘both’.
Illustration of GenericIPAddressField using an Example. Consider a project named geeksforgeeks having an app named geeks.
Refer to the following articles to check how to create a project and an app in Django.
How to Create a Basic Project using MVT in Django?
How to Create an App in Django ?
Enter the following code into models.py file of geeks app.
from django.db import modelsfrom django.db.models import Model# Create your models here.  class GeeksModel(Model):    geeks_field = models.GenericIPAddressField()
Add the geeks app to INSTALLED_APPS
# Application definition  INSTALLED_APPS = [    'django.contrib.admin',    'django.contrib.auth',    'django.contrib.contenttypes',    'django.contrib.sessions',    'django.contrib.messages',    'django.contrib.staticfiles',    'geeks',]
Now when we run makemigrations command from the terminal,
Python manage.py makemigrations
A new folder named migrations would be created in geeks directory with a file named 0001_initial.py
# Generated by Django 2.2.5 on 2019-09-25 06:00  from django.db import migrations, models  class Migration(migrations.Migration):      initial = True      dependencies = [    ]      operations = [        migrations.CreateModel(            name ='GeeksModel',            fields =[                ('id',                   models.AutoField(                  auto_created = True,                  primary_key = True,                  serialize = False,                   verbose_name ='ID'                )),                ('geeks_field',                   models.GenericIPAddressField()),            ],        ),    ]
Now run,
Python manage.py migrate
Thus, an geeks_field GenericIPAddressField is created when you run migrations on the project. It is a field to store a integer numbers.
GenericIPAddressField is used for storing Pv4 or IPv6 address, in string format, so it is basically a CharField with validation of IP Address. Let’s try to save a IP address “0.0.0.0” in this field.
# importing the model# from geeks appfrom geeks.models import GeeksModel  # creating an instance of# IP addressesd = "0.0.0.0"  # creating a instance of # GeeksModelgeek_object = GeeksModel.objects.create(geeks_field = d)geek_object.save()
Now let’s check it in admin server. We have created an instance of GeeksModel.
Field Options are the arguments given to each field for applying some constraint or imparting a particular characteristic to a particular Field. For example, adding an argument null = True to GenericIPAddressField will enable it to store empty values for that table in relational database.Here are the field options and attributes that an GenericIPAddressField can use.
NaveenArora
Django-models
Python Django
Python
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