first commit

cart/models.py

@@ -0,0 +1,33 @@
+from django.db import models
+from django.conf import settings
+from product.models import Product
+
+class Cart(models.Model):
+    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='cart')
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    def __str__(self):
+        return f"{self.user.email} - Cart"
+
+    def get_total_price(self):
+        return sum(item.total_price for item in self.items.all())
+
+class CartItem(models.Model):
+    cart = models.ForeignKey(Cart, on_delete=models.CASCADE, related_name='items')
+    product = models.ForeignKey(Product, on_delete=models.CASCADE)
+    quantity = models.PositiveIntegerField(default=1)
+    
+    class Meta:
+        unique_together = ('cart', 'product')
+
+    def __str__(self):
+        return f"{self.cart.user.email} - {self.product.title}"
+
+    @property
+    def price(self):
+        return self.product.price
+
+    @property
+    def total_price(self):
+        return self.price * self.quantity