feat: added print_count api, added merchant setting model, added manual mode setting for purchase order

api_v1/views/purchase_order.py

@@ -1,18 +1,61 @@
-from decimal import Decimal, InvalidOperation
-
-from rest_framework import status, views
+from rest_framework import status, views, serializers, pagination
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.response import Response
 
 from basic_info import models as basic_models
 from business import services as business_services
+from business import models as business_models
 from .stock_change_views.mixins import StockChangeViewMixin
 
 
+class PurchaseOrderItemSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = business_models.PurchaseOrderItem
+        fields = [
+            'id', 'product', 'price', 'color', 'quantity', 'unit',
+            'empty_diff_percent', 'quantity_of_rolls', 'num_of_rolls',
+            'batch_number', 'remarks', 'created_at', 'updated_at',
+        ]
+        read_only_fields = ['id', 'created_at', 'updated_at']
+
+
+class PurchaseOrderSerializer(serializers.ModelSerializer):
+    supplier_name = serializers.CharField(source='supplier.name', read_only=True)
+    operator_name = serializers.CharField(source='operator.name', read_only=True)
+    warehouse_name = serializers.CharField(source='warehouse.name', read_only=True)
+    items = PurchaseOrderItemSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = business_models.PurchaseOrder
+        fields = [
+            'id', 'supplier', 'supplier_name', 'purchase_date', 'kind',
+            'operator', 'operator_name', 'warehouse', 'warehouse_name',
+            'status', 'remarks', 'created_at', 'updated_at', 'items',
+        ]
+        read_only_fields = ['id', 'created_at', 'updated_at', 'items', 'supplier_name', 'operator_name', 'warehouse_name']
+
+
+class PurchaseOrderPagination(pagination.LimitOffsetPagination):
+    default_limit = 20
+    max_limit = 100
+
+
 class PurchaseOrderView(StockChangeViewMixin, views.APIView):
-    """创建采购订单并触发入库任务"""
+    """采购订单查询与创建"""
 
     permission_classes = [IsAuthenticated]
+    pagination_class = PurchaseOrderPagination
+
+    def get(self, request):
+        if not self.check_employee_permission(request):
+            return self.permission_error_response('无权限访问')
+        
+        merchant = request.user.employee.merchant
+        queryset = business_models.PurchaseOrder.objects.filter(merchant=merchant).prefetch_related('items', 'supplier', 'operator', 'warehouse')
+        paginator = self.pagination_class()
+        page = paginator.paginate_queryset(queryset.order_by('-created_at'), request, view=self)
+        serializer = PurchaseOrderSerializer(page, many=True)
+        return paginator.get_paginated_response(serializer.data)
 
     def post(self, request):
         if not self.check_employee_permission(request):
@@ -22,9 +65,8 @@ class PurchaseOrderView(StockChangeViewMixin, views.APIView):
         data = request.data or {}
 
         supplier_id = data.get('supplier')
-        warehouse_id = data.get('warehouse')
+        warehouse_id = data.get('warehouse_id') or data.get('warehouse')
         order_date = data.get('order_date')
-        total_amount = data.get('total_amount')
         items = data.get('items', [])
         remarks = data.get('remarks', '')
 
@@ -32,6 +74,10 @@ class PurchaseOrderView(StockChangeViewMixin, views.APIView):
             return Response({'error': '缺少供应商 ID'}, status=status.HTTP_400_BAD_REQUEST)
         if not warehouse_id:
             return Response({'error': '缺少仓库 ID'}, status=status.HTTP_400_BAD_REQUEST)
+        if not order_date:
+            return Response({'error': '缺少 order_date'}, status=status.HTTP_400_BAD_REQUEST)
+        if not isinstance(items, list) or not items:
+            return Response({'error': 'items 需要为非空数组'}, status=status.HTTP_400_BAD_REQUEST)
 
         try:
             supplier = basic_models.Supplier.objects.get(id=supplier_id, merchant=merchant)
@@ -39,22 +85,19 @@ class PurchaseOrderView(StockChangeViewMixin, views.APIView):
             return Response({'error': f'供应商 {supplier_id} 不存在'}, status=status.HTTP_400_BAD_REQUEST)
 
         try:
-            basic_models.WareHouse.objects.get(id=warehouse_id, merchant=merchant)
+            warehouse = basic_models.WareHouse.objects.get(id=warehouse_id, merchant=merchant)
         except basic_models.WareHouse.DoesNotExist:
             return Response({'error': f'仓库 {warehouse_id} 不存在'}, status=status.HTTP_400_BAD_REQUEST)
 
-        try:
-            total_amount_decimal = Decimal(str(total_amount))
-        except (InvalidOperation, TypeError):
-            return Response({'error': 'total_amount 必须为合法数值'}, status=status.HTTP_400_BAD_REQUEST)
+        operator = request.user.employee
 
         try:
             purchase_order = business_services.create_purchase_order(
                 merchant=merchant,
                 supplier=supplier,
                 order_date=order_date,
-                total_amount=total_amount_decimal,
-                warehouse_id=warehouse_id,
+                warehouse=warehouse,
+                operator=operator,
                 items=items,
                 remarks=remarks,
                 created_by=request.user,