[Python] How to Automatically Copy Product Attributes to Variants in Django Models?

I am building an e-commerce website in Django where:

• A Product can have multiple variants.
• Each product has attributes (e.g., color, storage, display size).
• I want each variant to automatically inherit all attributes from the main product when it is created.

Models (models.py)


from django.db import models

class Product(models.Model):
name = models.CharField(max_length=255)

class ProductVariant(models.Model):
product = models.ForeignKey(Product, on_delete=models.CASCADE, related_name="variants")
name = models.CharField(max_length=255) # Example: "Iphone 16 Black 128GB"

class ProductAttribute(models.Model):
product = models.ForeignKey(Product, on_delete=models.CASCADE, related_name="attributes")
attribute_name = models.CharField(max_length=255)
attribute_value = models.TextField()

What I Want to Achieve:

• When a ProductVariant is created, it should automatically copy all attributes from its main product.
• What is the best way to do this in Django?

I want a clean and efficient solution that works well even if I have many variants.
Any guidance would be appreciated. Thank you!

Continue reading...