reactor&feat: 重构工单模块 & 支持申请应用工单 (#5352)

* reactor: 修改工单Model，添加工单迁移文件

* reactor: 修改工单Model，添加工单迁移文件

* reactor: 重构工单模块

* reactor: 重构工单模块2

* reactor: 重构工单模块3

* reactor: 重构工单模块4

* reactor: 重构工单模块5

* reactor: 重构工单模块6

* reactor: 重构工单模块7

* reactor: 重构工单模块8

* reactor: 重构工单模块9

* reactor: 重构工单模块10

* reactor: 重构工单模块11

* reactor: 重构工单模块12

* reactor: 重构工单模块13

* reactor: 重构工单模块14

* reactor: 重构工单模块15

* reactor: 重构工单模块16

* reactor: 重构工单模块17

* reactor: 重构工单模块18

* reactor: 重构工单模块19

* reactor: 重构工单模块20

* reactor: 重构工单模块21

* reactor: 重构工单模块22

* reactor: 重构工单模块23

* reactor: 重构工单模块24

* reactor: 重构工单模块25

* reactor: 重构工单模块26

* reactor: 重构工单模块27

* reactor: 重构工单模块28

* reactor: 重构工单模块29

* reactor: 重构工单模块30

* reactor: 重构工单模块31

* reactor: 重构工单模块32

* reactor: 重构工单模块33

* reactor: 重构工单模块34

* reactor: 重构工单模块35

* reactor: 重构工单模块36

* reactor: 重构工单模块37

* reactor: 重构工单模块38

* reactor: 重构工单模块39

apps/tickets/api/comment.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+#
+
+from rest_framework import viewsets, mixins
+from django.shortcuts import get_object_or_404
+from common.exceptions import JMSException
+from common.utils import lazyproperty
+from tickets import serializers
+from tickets.models import Ticket
+from tickets.permissions.comment import IsAssignee, IsApplicant, IsSwagger
+
+
+__all__ = ['CommentViewSet']
+
+
+class CommentViewSet(mixins.CreateModelMixin, viewsets.ReadOnlyModelViewSet):
+    serializer_class = serializers.CommentSerializer
+    permission_classes = (IsSwagger| IsAssignee | IsApplicant,)
+
+    @lazyproperty
+    def ticket(self):
+        if getattr(self, 'swagger_fake_view', False):
+            return None
+        ticket_id = self.request.query_params.get('ticket_id')
+        try:
+            ticket = get_object_or_404(Ticket, pk=ticket_id)
+            return ticket
+        except Exception as e:
+            raise JMSException(str(e))
+
+    def get_serializer_context(self):
+        context = super().get_serializer_context()
+        context['ticket'] = self.ticket
+        return context
+
+    def get_queryset(self):
+        queryset = self.ticket.comments.all()
+        return queryset