1.开票申请搜索字段增加一个合同编号

2.案件管理搜索字段需要，项目类型、委托人、相对方、合同编号、标签
3.案件管理合同返还修改为填写时间

finance/views.py

@@ -819,6 +819,7 @@ class issueAnInvoiceDetail(APIView):
         times = request.data.get('times')
         end_time = request.data.get('end_time')
         unit = request.data.get('unit')
+        ContractNo = request.data.get('ContractNo')
         if not all([page, per_page]):
             return Response({'status': 'error', 'message': '缺少参数', 'code': 1}, status=status.HTTP_400_BAD_REQUEST)
         Q_obj = Q()
@@ -826,6 +827,8 @@ class issueAnInvoiceDetail(APIView):
             Q_obj &= Q(times__gte=times) & Q(times__lte=end_time)
         if unit:
             Q_obj &= Q(unit__icontains=unit)
+        if ContractNo:
+            Q_obj &= Q(ContractNo__icontains=ContractNo)
 
         invos = Invoice.objects.filter(Q_obj, is_deleted=False).order_by('-id')
         total = len(invos)