feat: update finance manager and fix some issue

src/backend/finance/views.py

@@ -0,0 +1,98 @@
+import os
+from rest_framework import viewsets, status
+from rest_framework.decorators import action
+from rest_framework.response import Response
+from .models import FinancialRecord, Department, Category, ProofImage
+from .serializers import (
+    FinancialRecordWriteSerializer,
+    FinancialRecordReadSerializer,
+    DepartmentSerializer,
+    CategorySerializer,
+    ProofImageSerializer
+)
+
+class FinancialRecordViewSet(viewsets.ModelViewSet):
+    """
+    API endpoint that allows financial records to be viewed or edited.
+    """
+    queryset = FinancialRecord.objects.all()
+
+    def get_serializer_class(self):
+        """根据操作类型返回不同的序列化器"""
+        if self.action in ['list', 'retrieve']:
+            return FinancialRecordReadSerializer
+        return FinancialRecordWriteSerializer
+
+    @action(detail=True, methods=['post'])
+    def upload_images(self, request, pk=None):
+        """为财务记录上传多张凭证图片"""
+        record = self.get_object()
+        files = request.FILES.getlist('images')
+
+        if not files:
+            return Response({'error': '没有接收到图片文件'}, status=status.HTTP_400_BAD_REQUEST)
+
+        created_images = []
+        for file in files:
+            proof_image = ProofImage.objects.create(
+                financial_record=record,
+                image=file,
+                description=request.data.get('description', '')
+            )
+            created_images.append(ProofImageSerializer(proof_image).data)
+
+        return Response({
+            'message': f'成功上传 {len(created_images)} 张图片',
+            'images': created_images
+        }, status=status.HTTP_201_CREATED)
+
+
+class ProofImageViewSet(viewsets.ModelViewSet):
+    """
+    API endpoint that allows proof images to be viewed or edited.
+    """
+    queryset = ProofImage.objects.all()
+    serializer_class = ProofImageSerializer
+
+    def destroy(self, request, *args, **kwargs):
+        """重写删除方法，确保删除图片记录时同时删除物理文件"""
+        instance = self.get_object()
+
+        # 获取文件路径
+        file_path = None
+        if instance.image:
+            try:
+                file_path = instance.image.path
+            except (ValueError, AttributeError):
+                # 如果文件路径无效或文件不存在，只删除数据库记录
+                pass
+
+        # 删除数据库记录
+        super().destroy(request, *args, **kwargs)
+
+        # 删除物理文件
+        if file_path and os.path.isfile(file_path):
+            try:
+                os.remove(file_path)
+                print(f"成功删除文件: {file_path}")
+            except OSError as e:
+                print(f"删除文件失败: {file_path}, 错误: {e}")
+                # 即使文件删除失败，也不抛出异常，因为数据库记录已经删除
+
+        return Response({'message': '图片删除成功'}, status=status.HTTP_200_OK)
+
+
+class DepartmentViewSet(viewsets.ModelViewSet):
+    """
+    API endpoint that allows departments to be viewed or edited.
+    """
+    queryset = Department.objects.all()
+    serializer_class = DepartmentSerializer
+
+
+class CategoryViewSet(viewsets.ModelViewSet):
+    """
+    API endpoint that allows categories to be viewed or edited.
+    """
+    queryset = Category.objects.all()
+    serializer_class = CategorySerializer