field_name = models.URLField (max_length = 200, ** options )
URLField has one additional optional argument:
The maximum length (in characters) of the field. Maximum
max_length applies at the database level and when validated by Django using MaxLengthValidator . If not specified, the default is 200.
Django URLField Model Explanation
Example URLField illustration. Consider a project named
pythonengineering that has an application named
Refer to the following articles to check how to create a project and an app in Django.
Enter the following code into the
models.py file of the geeks application.
Add the geek app to
Now when we run
makemigrations from the terminal,
Python manage.py makemigrations
A new folder named migrations will be created in the
geeks directory with a file named
Now run ,
Python manage.py migrate
geeks_field geeks_field is generated when migrations are run in the project. This is a field for storing URLs validated by URLValidator .
How to use a URLField?
URLField is used to store URLs in the database. You can store any URLs, both internal and external. URLField must be given the
max_length argument to specify the maximum length of the string that you want to store. On a production server, after deploying a Django app, space is very limited. Therefore, it is always optimal to use max_length as required by the field. Let’s instantiate the URLField we’ve created and see if it works.
Now let’s check this on the admin server ... We have created a GeeksModel instance.
Field options — they are arguments given to each field to apply some constraint or to convey a particular characteristic to a particular field. For example, adding the
null = True argument to the URLField will allow it to store null values for that table in a relational database.
Here are the field options and attributes that the URLField can use.
|If True , Django will store empty values as NULL in the database. Default is False.
|If True , the field is allowed to be blank ... Default is False.
|An iterable (eg, a list or tuple) of 2-tuples to use as choices for this field.
|The default value for the field. This can be a value or a callable object. If callable it will be called every time a new object is created.
|Extra “help” text to be displayed with the form widget. It’s useful for documentation even if your field isn’t used on a form.
|If True, this field is the primary key for the model .
|If True, this field must be unique throughout the table.