blya yy

from django.db import models
from django.contrib.auth.models import User


class Category(models.Model):
    name = models.CharField(max_length=20, unique=True)


class Product(models.Model):
    category = models.ForeignKey(Category, on_delete=models.CASCADE, related_name='products')

    name = models.CharField(max_length=20, unique=True)


class ProductVersion(models.Model):
    product = models.ForeignKey(Product, on_delete=models.CASCADE, related_name='product_versions')

    name = models.CharField(max_length=40, unique=True)
    description = models.TextField()
    price = models.DecimalField(max_digits=8, decimal_places=2)


class Order(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='orders')
    products = models.ManyToManyField(ProductVersion, related_name='products')

    delivery_address = models.CharField(max_length=80)
    delivery_at = models.DateTimeField(auto_now_add=True)