field_name = models.PositiveIntegerField ( ** options )
Django’s Model PositiveIntegerField Explanation
An illustration of a PositiveIntegerField using an example. 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.
Now when we run the
makemigrations command from the terminal,
Python manage.py makemigrations
gee directory ks a new folder named migrations will be created with a file named
Python manage.py migrate
geeks_field PositiveIntegerField is created when you run migrations in the project. This is a field for storing positive integers.
How to use PositiveIntegerField?
PositiveIntegerField is used to store an integer, represented in Python by an int instance. To learn more about Int, visit
# model import
# from the geek app
# create an instance
# create an instance
Now let’s check it out on the admin server. We have created a GeeksModel instance.
Field parameters — 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 PositiveIntegerField will allow it to store empty values for that table in a relational database.
Here are the field parameters and attributes that PositiveIntegerField 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.