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/ticket.py

@@ -1,44 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-
-from rest_framework import viewsets
-from django.shortcuts import get_object_or_404
-
-from common.permissions import IsValidUser
-from common.utils import lazyproperty
-from .. import serializers, models, mixins
-
-
-class TicketViewSet(mixins.TicketMixin, viewsets.ModelViewSet):
-    serializer_class = serializers.TicketSerializer
-    queryset = models.Ticket.origin_objects.all()
-    permission_classes = (IsValidUser,)
-    filter_fields = ['status', 'title', 'action', 'user_display']
-    search_fields = ['user_display', 'title']
-
-
-class TicketCommentViewSet(viewsets.ModelViewSet):
-    serializer_class = serializers.CommentSerializer
-    http_method_names = ['get', 'post']
-
-    def check_permissions(self, request):
-        ticket = self.ticket
-        if request.user == ticket.user or \
-                request.user in ticket.assignees.all():
-            return True
-        return False
-
-    def get_serializer_context(self):
-        context = super().get_serializer_context()
-        context['ticket'] = self.ticket
-        return context
-
-    @lazyproperty
-    def ticket(self):
-        ticket_id = self.kwargs.get('ticket_id')
-        ticket = get_object_or_404(models.Ticket, pk=ticket_id)
-        return ticket
-
-    def get_queryset(self):
-        queryset = self.ticket.comments.all()
-        return queryset