transaction system deploying

apps/warehouse/pos/api/v1/api.py

@@ -84,7 +84,7 @@ class InventoryEntryViewSet(viewsets.ModelViewSet, DynamicSearchMixin, POSDevice
 
 
 class InventoryQuotaSaleTransactionViewSet(viewsets.ModelViewSet, DynamicSearchMixin, POSDeviceMixin):
-    queryset = warehouse_models.InventoryQuotaSaleTransaction.objects.all()
+    queryset = warehouse_models.InventoryQuotaSaleTransaction.objects.all().prefetch_related('items')
     serializer_class = warehouse_serializers.InventoryQuotaSaleTransactionSerializer
     permission_classes = [AllowAny]
     search_fields = [

apps/warehouse/pos/api/v1/serializers.py

@@ -8,11 +8,12 @@ from apps.product.services.services import (
 from apps.pos_device.services.services import pos_organizations_sharing_information
 from apps.pos_device.pos.api.v1.serializers.device import DeviceSerializer
 from apps.herd.pos.api.v1.serializers import RancherSerializer
+from apps.warehouse import models as warehouse_models
 from apps.warehouse.exceptions import (
     TotalInventorySaleException
 )
-from apps.warehouse import models as warehouse_models
 from rest_framework import serializers
+from apps.herd.models import Rancher
 from django.db import models
 
 
@@ -95,25 +96,62 @@ class InventoryEntrySerializer(serializers.ModelSerializer):
 
 
 class InventoryQuotaSaleTransactionSerializer(serializers.ModelSerializer):
+    rancher_national_code = serializers.CharField(max_length=50, required=False)
     class Meta:  # noqa
         model = warehouse_models.InventoryQuotaSaleTransaction
         fields = '__all__'
         depth = 0
 
+    def create(self, validated_data):
+        items_data = self.context['request'].data['items']
+
+        # get rancher with national code
+        rancher = Rancher.objects.get(national_code=validated_data.pop('rancher_national_code'))
+        validated_data.update({'rancher': rancher})
+
+        # if transaction exists, update transaction status
+        transaction = self.Meta.model.objects.filter(
+            transaction_id=validated_data.get('transaction_id')
+        )
+        if transaction.exists():
+            obj = transaction.first()
+            obj.transaction_status = validated_data.get('transaction_status')
+            obj.save(update_fields=['transaction_status'])
+
+            return obj
+
+        # create transaction record
+        transaction = warehouse_models.InventoryQuotaSaleTransaction.objects.create(
+            **validated_data
+        )
+
+        # calculate total price of product items in shopping cart
+        total_price = 0
+        for item_data in items_data:
+            item = warehouse_models.InventoryQuotaSaleItem.objects.create(
+                transaction=transaction,
+                **item_data
+            )
+            total_price += item.total_price
+        transaction.transaction_price = total_price
+        transaction.save()
+
+        return transaction
+
     def validate(self, attrs):
         """
         validate total inventory sale should be fewer than
         inventory entry from distribution
         """
-        inventory_entry = attrs['inventory_entry']
-        distribution = attrs['quota_distribution']
+        if 'quota_distribution' in attrs.keys():
+            distribution = attrs['quota_distribution']
 
-        total_sale_weight = inventory_entry.inventory_sales.aggregate(
-            total=models.Sum('weight')
-        )['total'] or 0
+            total_sale_weight = distribution.inventory_sales.aggregate(
+                total=models.Sum('weight')
+            )['total'] or 0
 
-        if total_sale_weight + attrs['weight'] > distribution.warehouse_balance:
-            raise TotalInventorySaleException()
+            if total_sale_weight + attrs['weight'] > distribution.warehouse_balance:
+                raise TotalInventorySaleException()
 
         return attrs
 
@@ -122,10 +160,29 @@ class InventoryQuotaSaleTransactionSerializer(serializers.ModelSerializer):
 
         representation = super().to_representation(instance)
 
-        representation['rancher'] = RancherSerializer(instance.rancher).data
+        if instance.rancher:
+            representation['rancher'] = RancherSerializer(instance.rancher).data
         representation['pos_device'] = DeviceSerializer(instance.pos_device).data
-        representation['seller_organization'] = instance.seller_organization.name
-        representation['inventory_entry'] = InventoryEntrySerializer(instance.inventory_entry).data
+        if instance.seller_organization:
+            representation['seller_organization'] = instance.seller_organization.name
+        if instance.inventory_entry:
+            representation['inventory_entry'] = InventoryEntrySerializer(instance.inventory_entry).data
 
         return representation
 
+
+class InventoryQuotaSaleItemSerializer(serializers.ModelSerializer):
+    product_name = serializers.CharField(source='product.name', read_only=True)
+
+    class Meta:
+        model = warehouse_models.InventoryQuotaSaleItem
+        fields = [
+            'id',
+            "transaction",
+            "product",
+            "product_name",
+            "weight",
+            "unit_price",
+            "total_price",
+
+        ]