URLField – Django Models

12 Feb, 2020
URLField is a CharField, for a URL. It is generally used for storing webpage links or particularly called as URLs. It is validated by URLValidator. To store larger text TextField is used. The default form widget for this field is TextInput.
Syntax
field_name = models.URLField(max_length=200, **options)
URLField has one extra optional argument:
URLField.max_length
The maximum length (in characters) of the field. The max_length is enforced at the database level and in Django’s validation using MaxLengthValidator. If not specified, a default of 200 is used.
Illustration of URLField 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.URLField(max_length = 200)
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.URLField(                  max_length = 200,                )),            ],        ),    ]
Now run,
Python manage.py migrate
Thus, an geeks_field URLField is created when you run migrations on the project. It is a field to store URLs validated by URLValidator.
URLField is used for storing URLs in the database. One can store any kind of URL, either internal or external link. URLField should be given an argument max_length for specifying the maximum length of string it is required to store. In the production server, after the Django application is deployed, space is very limited. So it is always optimal to use max_length according to the requirement of the field. Let us create an instance of the URLField we created and check if it is working.
# importing the model# from geeks appfrom geeks.models import GeeksModel  # creating a instance of # GeeksModelgeek_object = GeeksModel.objects.create(geeks_field ="https://www.geeksforgeeks.org / charfield-django-models/")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 URLField will enable it to store empty values for that table in relational database.Here are the field options and attributes that an URLField can use.
NaveenArora
Django-models
Python Django
Python
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