? Creating & Applying Migrations

? Quick Overview

Django migrations help track and apply changes made to your models into the database schema using the makemigrations and migrate commands.

? Key Concepts

• Migrations are version-controlled database schema changes
• Automatically generated from model changes
• Applied incrementally and safely

? Syntax & Theory

makemigrations creates migration files, while migrate applies them to the database.

? Code Examples

# Create migration files for all apps
python manage.py makemigrations

# Apply all pending migrations
python manage.py migrate

# Django model with a newly added field
class Product(models.Model):
name = models.CharField(max_length=100)
price = models.DecimalField(max_digits=10, decimal_places=2)
stock = models.IntegerField()

?️ Migration Playground

Simulate the workflow! Add a field to the model, generate a migration file, and apply it to the database.

? Live Output / Explanation

After running migrations, Django updates the database schema to match the models. New tables or columns become available without data loss.

? Interactive Concept

Think of migrations as a timeline: each migration is a step that moves your database forward safely, one change at a time.

? Use Cases

• Adding new fields to existing models
• Modifying field types
• Keeping team databases in sync