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.
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 co de> 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 .
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.
|Null||If True , Django will store empty values as NULL in the database. Default is False.|
|Blank||If True , the field is allowed to be blank ... Default is False.|
|Choices||An iterable (eg, a list or tuple) of 2-tuples to use as choices for this field.|
|Default||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.|
|help_text||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.|
|primary_key||If True, this field is the primary key for the model .|
|Unique||If True, this field must be unique throughout the table.|