product varient change list bug fix order item change quantity and remove

backend/order/execptions.py

@@ -0,0 +1,2 @@
+class DiscountNotAvailableError(Exception):
+    pass

backend/order/migrations/0004_alter_orderitemmodel_product.py

@@ -0,0 +1,20 @@
+# Generated by Django 5.1.2 on 2025-02-13 20:07
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('order', '0003_alter_orderitemmodel_product'),
+        ('product', '0023_alter_productimagemodel_options_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='orderitemmodel',
+            name='product',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='product.productvariant', verbose_name='محصول'),
+        ),
+    ]

backend/order/models.py

@@ -1,8 +1,8 @@
 from django.db import models
 from account.models import User, UserAddressModel
-from product.models import ProductModel
+from product.models import ProductModel, ProductVariant
 from django.utils import timezone
-
+from .execptions import DiscountNotAvailableError
 class DiscountCode(models.Model):
     name = models.CharField(max_length=50, verbose_name='کد تخفیف')
     percent = models.DecimalField(max_digits=4, decimal_places=2, verbose_name='درصد')
@@ -43,13 +43,15 @@ class OrderModel(models.Model):
         verbose_name = 'سفارش'
         verbose_name_plural = 'سفارشات'
 
-    def total_without_tax(self):
-        return sum(item.total() for item in self.items.all())
+    # def total_without_tax(self):
+    #     return sum(item.total() for item in self.items.all())
 
 
     def total_with_discount(self):
         total_with_item_discount = sum(item.total_with_discount() for item in self.items.all())
-        if self.discount_code and self.discount_code.is_valid():
+        if self.discount_code:
+            if not self.discount_code.is_valid():
+                raise DiscountNotAvailableError('این کد تخفیف دیگر معتبر نیست')
             discount_percent = self.discount_code.percent
             return total_with_item_discount * ((100 - discount_percent) / 100)
         return total_with_item_discount
@@ -59,7 +61,7 @@ class OrderModel(models.Model):
         return self.total_without_tax() * 0.2
     
     def total(self):
-        return self.total_without_tax + self.tax()
+        return self.total_with_discount() + self.tax()
 
     def remove_order_item(self, item_pk, quantity):
         pass
@@ -75,7 +77,7 @@ class OrderModel(models.Model):
 class OrderItemModel(models.Model):
     order = models.ForeignKey(OrderModel, on_delete=models.CASCADE, related_name='items', verbose_name='سفارش')
     quantity = models.SmallIntegerField(verbose_name="تعداد")
-    product = models.ForeignKey(ProductModel, on_delete=models.PROTECT, verbose_name="محصول")
+    product = models.ForeignKey(ProductVariant, on_delete=models.PROTECT, verbose_name="محصول")
     class Meta:
         verbose_name = 'محصول خریداری شده'
         verbose_name_plural = 'محصولات خریداری شده'
@@ -85,5 +87,6 @@ class OrderItemModel(models.Model):
 
     def total_with_discount(self):
         return self.quantity * self.product.get_toman_price_after_discount()
-
+    def __str__(self):
+        return f'ایتم سبد خرید محصول: {self.product} کاربر {self.order.user}'
 

backend/order/serializers.py

@@ -0,0 +1,9 @@
+from rest_framework import serializers
+from .models import OrderItemModel
+
+
+class OrderItemSerailzier(serializers.ModelSerializer):
+    class Meta:
+        model = OrderItemModel
+        fields = "__all__"
+        read_only_fields = ('order', 'product')

backend/order/urls.py

@@ -0,0 +1,8 @@
+from django.conf.urls.static import static
+from django.contrib import admin
+from django.urls import path, include
+from .views import CartItemViews
+
+urlpatterns = [
+    path('cart/item/<int:pk>', CartItemViews.as_view(), name='add cart'),
+]

backend/order/views.py

@@ -1,3 +1,68 @@
 from django.shortcuts import render
+from .execptions import DiscountNotAvailableError
+from rest_framework.views import APIView, Response
+from django.shortcuts import get_object_or_404
+from product.models import ProductVariant
+from rest_framework.permissions import IsAuthenticated
+from .serializers import OrderItemSerailzier
+# from cart.models import 
+from rest_framework import status
+from .models import OrderItemModel, OrderModel
+try:
+    pass
+except DiscountNotAvailableError:
+    pass
 
-# Create your views here.
+"""
+
+add post
+remove delete
+show get 
+
+pay
+"""
+
+
+
+class CartItemViews(APIView):
+    permission_classes = [IsAuthenticated]
+    serializer_class = OrderItemSerailzier
+    def post(self, request, pk):
+            product_variant = get_object_or_404(ProductVariant, pk=pk)
+
+            cart_order, created = OrderModel.objects.get_or_create(
+                user=request.user,
+                status='CART'
+            )
+            order_item, created = OrderItemModel.objects.get_or_create(
+                order=cart_order,
+                product=product_variant,
+                defaults={'quantity': request.data.get('quantity', 1)}
+            )
+
+            if not created:  
+                order_item.quantity = request.data.get('quantity', 1)
+                order_item.save()
+
+            return Response({'detail': 'it did something'}, status=status.HTTP_201_CREATED)
+    def delete(self, request, pk):
+            product_variant = get_object_or_404(ProductVariant, pk=pk)
+
+            cart_order, created = OrderModel.objects.get_or_create(
+                user=request.user,
+                status='CART'
+            )
+            # order_item, created = OrderItemModel.objects.get_or_create(
+            #     order=cart_order,
+            #     product=product_variant,
+            #     defaults={'quantity': request.data.get('quantity', 1)}
+            # )
+            order_item = get_object_or_404(OrderItemModel, order=cart_order, product=product_variant)
+            order_item.delete()
+            return Response({'detail': 'it did something related to delete'}, status=status.HTTP_204_NO_CONTENT)
+
+
+
+class CartViews(APIView):
+    def get(self, request):
+        pass