Model is a class that represents a table from a database. Attributes of a model class are attributes of a table in the database (columns or fields).

Instances of this class are records (data) in the database.

Consider the table below for a better understanding:

Look at the attributes of this table on the ER diagram.

The ER diagram represents the table structure. We can build this structure in the Django project using the Django ORM.

Note

Object Relation Mapping (ORM) is an interface for database manipulation.

The code of this table structure should look like this:

from django.db import models


class Product(models.Model):
    name = models.CharField(max_length=100)
    price = models.FloatField()
    quantity = models.IntegerField()

Where:

• Product is a table name.
• name, price, and quantity are attributes of the Product table.
• models is a package with Django ORM tools.

Note

The id field is created automatically in Django. We will describe this later.