What is a Model?

A model is a Python class that defines the structure of a database table.

Defining a Model

1. 1. Open the models.py file in your app directory.
   2. Create a model class that inherits from models.Model:

from django.db import models

class Book(models.Model):
    title = models.CharField(max_length=100)
    author = models.CharField(max_length=50)
    publication_date = models.DateField()
    isbn = models.CharField(max_length=13, unique=True)
    available = models.BooleanField(default=True)

Field Types

Django provides various field types for defining data:

• CharField: Stores strings of a specified maximum length.
• IntegerField: Stores integers.
• DateField: Stores date values.
• BooleanField: Stores True or False.

Metadata and Methods

• Meta Class: Add metadata about your model.

class Meta:
    ordering = ['-publication_date']  # Sort by newest first

• Custom Methods: Add functionality to the model.

def __str__(self):
    return self.title  # String representation of the object