transaction system deploying

apps/authentication/signals.py

@@ -3,6 +3,7 @@ from apps.product.models import QuotaDistribution
 from apps.warehouse.models import InventoryQuotaSaleTransaction
 from apps.authentication.models import Organization, OrganizationStats
 from django.db.models.signals import post_save, post_delete
+from rest_framework.exceptions import APIException
 from django.dispatch import receiver
 
 
@@ -38,6 +39,12 @@ def update_organization_stats(instance: Organization):
 @receiver([post_save, post_delete], sender=InventoryQuotaSaleTransaction)
 def organization_stats(sender, instance, **kwargs):
     if sender == QuotaDistribution:
-        update_organization_stats(instance.assigned_organization)
+        if instance.assigned_organization:
+            update_organization_stats(instance.assigned_organization)
+        else:
+            print("assigned_organization is null")
     elif sender == InventoryQuotaSaleTransaction:
-        update_organization_stats(instance.inventory_entry.organization)
+        if instance.inventory_entry:
+            update_organization_stats(instance.inventory_entry.organization)
+        else:
+            print("inventory_entry is null - authentication app signals")

apps/product/signals.py

@@ -244,5 +244,8 @@ def update_stats_on_change(sender, instance, **kwargs):
         update_product_stats(instance.quota.product, instance)
         update_quota_stats(instance.quota)
     elif sender == InventoryQuotaSaleTransaction:
-        update_product_stats(instance.quota_distribution.quota.product, instance.quota_distribution)
+        if instance.quota_distribution:
-        update_quota_stats(instance.quota_distribution.quota)
+            update_product_stats(instance.quota_distribution.quota.product, instance.quota_distribution)
+            update_quota_stats(instance.quota_distribution.quota)
+        else:
+            print("quota distribution is null - product app signal")

apps/warehouse/migrations/0017_inventoryquotasaleitem.py

@@ -0,0 +1,38 @@
+# Generated by Django 5.0 on 2025-09-09 08:55
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('product', '0072_alter_quota_base_price_cooperative_and_more'),
+        ('warehouse', '0016_inventoryquotasaletransaction_additional_and_more'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='InventoryQuotaSaleItem',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('create_date', models.DateTimeField(auto_now_add=True)),
+                ('modify_date', models.DateTimeField(auto_now=True)),
+                ('creator_info', models.CharField(max_length=100, null=True)),
+                ('modifier_info', models.CharField(max_length=100, null=True)),
+                ('trash', models.BooleanField(default=False)),
+                ('weight', models.PositiveBigIntegerField(default=0)),
+                ('unit_price', models.PositiveBigIntegerField(default=0)),
+                ('total_price', models.PositiveBigIntegerField(default=0)),
+                ('created_by', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='%(class)s_createddby', to=settings.AUTH_USER_MODEL)),
+                ('modified_by', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='%(class)s_modifiedby', to=settings.AUTH_USER_MODEL)),
+                ('product', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='sale_items', to='product.product')),
+                ('transaction', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='items', to='warehouse.inventoryquotasaletransaction')),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

apps/warehouse/migrations/0018_remove_inventoryquotasaletransaction_product_and_more.py

@@ -0,0 +1,21 @@
+# Generated by Django 5.0 on 2025-09-09 08:55
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('warehouse', '0017_inventoryquotasaleitem'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='inventoryquotasaletransaction',
+            name='product',
+        ),
+        migrations.RemoveField(
+            model_name='inventoryquotasaletransaction',
+            name='weight',
+        ),
+    ]

apps/warehouse/migrations/0019_inventoryquotasaleitem_quota_distribution_and_more.py

@@ -0,0 +1,25 @@
+# Generated by Django 5.0 on 2025-09-09 11:01
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('product', '0072_alter_quota_base_price_cooperative_and_more'),
+        ('warehouse', '0018_remove_inventoryquotasaletransaction_product_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='inventoryquotasaleitem',
+            name='quota_distribution',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='sale_items', to='product.quotadistribution'),
+        ),
+        migrations.AddField(
+            model_name='inventoryquotasaletransaction',
+            name='items_total_weight',
+            field=models.PositiveBigIntegerField(default=0),
+        ),
+    ]

apps/warehouse/migrations/0020_remove_inventoryquotasaletransaction_items_total_weight.py

@@ -0,0 +1,17 @@
+# Generated by Django 5.0 on 2025-09-09 11:06
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('warehouse', '0019_inventoryquotasaleitem_quota_distribution_and_more'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='inventoryquotasaletransaction',
+            name='items_total_weight',
+        ),
+    ]

apps/warehouse/migrations/0021_inventoryquotasaletransaction_weight.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.0 on 2025-09-09 11:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('warehouse', '0020_remove_inventoryquotasaletransaction_items_total_weight'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='inventoryquotasaletransaction',
+            name='weight',
+            field=models.PositiveBigIntegerField(default=0),
+        ),
+    ]

apps/warehouse/models.py

@@ -88,14 +88,8 @@ class InventoryQuotaSaleTransaction(BaseModel):
         related_name='inventory_sales',
         null=True
     )
-    weight = models.DecimalField(max_digits=12, decimal_places=2, null=True)
+    weight = models.PositiveBigIntegerField(default=0)
     delivery_address = models.TextField(blank=True, null=True)
-    product = models.ForeignKey(
-        product_models.Product,
-        on_delete=models.CASCADE,
-        related_name='sale_transactions',
-        null=True
-    )
     transaction_price = models.PositiveBigIntegerField(default=0)
     price_paid = models.PositiveBigIntegerField(default=0)
     type_of_price = (
@@ -121,17 +115,43 @@ class InventoryQuotaSaleTransaction(BaseModel):
     payer_cart = models.CharField(max_length=50, null=True)
     additional = models.JSONField(default=dict)
 
-    def buyers_count(self):
+    @property
-        """ number of buyers from specific inventory """
+    def total_weight(self):
-
+        """ summation of total sold product weight """
-        unique_buyers_count = self.objects.filter(
+        return sum(item.weight for item in self.items.all)
-            inventory_entry=self.inventory_entry
-        ).values('buyer_user').distinct().count()
-
-        return unique_buyers_count
 
     def __str__(self):
         return f"Inventory Sale: {self.transaction_id}-{self.quota_distribution.distribution_id}"
 
     def save(self, *args, **kwargs):
         super(InventoryQuotaSaleTransaction, self).save(*args, **kwargs)
+
+
+class InventoryQuotaSaleItem(BaseModel):
+    transaction = models.ForeignKey(
+        InventoryQuotaSaleTransaction,
+        on_delete=models.CASCADE,
+        related_name='items',
+        null=True
+    )
+    quota_distribution = models.ForeignKey(
+        product_models.QuotaDistribution,
+        on_delete=models.CASCADE,
+        related_name='sale_items',
+        null=True
+    )
+    product = models.ForeignKey(
+        product_models.Product,
+        on_delete=models.CASCADE,
+        related_name='sale_items',
+        null=True
+    )
+    weight = models.PositiveBigIntegerField(default=0)
+    unit_price = models.PositiveBigIntegerField(default=0)
+    total_price = models.PositiveBigIntegerField(default=0)
+
+    def __str__(self):
+        return f'Item {self.product} - {self.weight} Kg - {self.total_price}'
+
+    def save(self, *args, **kwargs):
+        return super(InventoryQuotaSaleItem, self).save(*args, **kwargs)

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']
+        if 'quota_distribution' in attrs.keys():
-        distribution = attrs['quota_distribution']
+            distribution = attrs['quota_distribution']
 
-        total_sale_weight = inventory_entry.inventory_sales.aggregate(
+            total_sale_weight = distribution.inventory_sales.aggregate(
-            total=models.Sum('weight')
+                total=models.Sum('weight')
-        )['total'] or 0
+            )['total'] or 0
 
-        if total_sale_weight + attrs['weight'] > distribution.warehouse_balance:
+            if total_sale_weight + attrs['weight'] > distribution.warehouse_balance:
-            raise TotalInventorySaleException()
+                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
+        if instance.seller_organization:
-        representation['inventory_entry'] = InventoryEntrySerializer(instance.inventory_entry).data
+            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",
+
+        ]

apps/warehouse/signals.py

@@ -34,4 +34,7 @@ def update_distribution_warehouse_entry(sender, instance, **kwargs):
 @receiver(post_save, sender=InventoryQuotaSaleTransaction)
 @receiver(post_delete, sender=InventoryQuotaSaleTransaction)
 def update_distribution_warehouse_sold_and_balance(sender, instance, **kwargs):
-    warehouse_sold_and_balance(instance.quota_distribution)
+    if instance.quota_distribution:
+        warehouse_sold_and_balance(instance.quota_distribution)
+    else:
+        print("quota distribution is null - warehouse app signals")