quota, distribution, inventory entry, quota sale transaction, product informations, signals ,....

apps/warehouse/web/api/v1/api.py

@@ -0,0 +1,17 @@
+from apps.warehouse.web.api.v1 import serializers as warehouse_serializers
+from apps.warehouse import models as warehouse_models
+from rest_framework.decorators import action
+from rest_framework.response import Response
+from rest_framework import viewsets
+from django.db import transaction
+from rest_framework import status
+
+
+class InventoryEntryViewSet(viewsets.ModelViewSet):
+    queryset = warehouse_models.InventoryEntry.objects.all()
+    serializer_class = warehouse_serializers.InventoryEntrySerializer
+
+
+class InventoryQuotaSaleTransactionViewSet(viewsets.ModelViewSet):
+    queryset = warehouse_models.InventoryQuotaSaleTransaction.objects.all()
+    serializer_class = warehouse_serializers.InventoryQuotaSaleTransactionSerializer

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

@@ -0,0 +1,90 @@
+from apps.warehouse.exceptions import (
+    InventoryEntryWeightException,
+    TotalInventorySaleException
+)
+from apps.product.exceptions import QuotaExpiredTimeException
+from apps.warehouse import models as warehouse_models
+from apps.authorization.models import UserRelations
+from rest_framework import serializers
+from django.db import models
+
+
+class InventoryEntrySerializer(serializers.ModelSerializer):
+    class Meta:
+        model = warehouse_models.InventoryEntry
+        fields = '__all__'
+
+    def create(self, validated_data):
+        """ Custom create & set organization """
+
+        distribution = validated_data['distribution']
+        organization = distribution.assigned_organization
+
+        return warehouse_models.InventoryEntry.objects.create(
+            organization=organization,
+            **validated_data
+        )
+
+    def validate(self, attrs):
+        """
+        check if inventory entries weight is not more than
+        distribution weight & check quota expired time
+        """
+
+        distribution = attrs['distribution']
+
+        # check for quota expired time
+        if not distribution.quota.is_in_valid_time():
+            raise QuotaExpiredTimeException()
+
+        # total inventory entries weight
+        total_entered = distribution.inventory_entry.filter(is_confirmed=True).aggregate(
+            total=models.Sum('weight')
+        )['total'] or 0
+
+        if total_entered + attrs['weight'] > distribution.weight:
+            raise InventoryEntryWeightException()
+
+        return attrs
+
+
+class InventoryQuotaSaleTransactionSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = warehouse_models.InventoryQuotaSaleTransaction
+        fields = '__all__'
+        depth = 0
+
+    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']
+
+        total_sale_weight = inventory_entry.inventory_sales.aggregate(
+            total=models.Sum('weight')
+        )['total'] or 0
+
+        if total_sale_weight + attrs['weight'] > distribution.warehouse_balance:
+            raise TotalInventorySaleException()
+
+        return attrs
+
+    def create(self, validated_data):
+        """ Custom create & set some parameters like seller & buyer """
+
+        distribution = validated_data['quota_distribution']
+        seller_organization = distribution.assigned_organization
+
+        user = self.context['request'].user
+        buyer_user = user
+        seller_user = validated_data['inventory_entry'].created_by
+
+        return warehouse_models.InventoryQuotaSaleTransaction.objects.create(
+            seller_organization=seller_organization,
+            seller_user=seller_user,
+            buyer_user=buyer_user,
+            **validated_data
+        )
+

apps/warehouse/web/api/v1/urls.py

@@ -0,0 +1,16 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from apps.warehouse.web.api.v1 import api
+
+router = DefaultRouter()
+router.register(r'inventory_entry', api.InventoryEntryViewSet, basename='inventory_entry')
+router.register(
+    r'inventory_sale_transaction',
+    api.InventoryQuotaSaleTransactionViewSet,
+    basename='inventory_sale_transaction'
+)
+
+
+urlpatterns = [
+    path('v1/', include(router.urls)),
+]