Defining Model Relationships

Snippet

Defining Model Relationships

A ForeignKey establishes a many-to-one relationship. Here, many Articles can belong to a single Category.

snippet.py
python
from django.db import models
 
class Category(models.Model):
    name = models.CharField(max_length=50)
 
class Article(models.Model):
    title = models.CharField(max_length=100)
    category = models.ForeignKey(Category, on_delete=models.CASCADE)

django

Breakdown

models.ForeignKey(...)

Defines a link to another model (Category).

on_delete=models.CASCADE

Ensures that if a Category is deleted, all its linked Articles are also removed.

Previous snippet Next snippet

More Beginner Python exercises →

From your library

Defining Model Relationships

Related