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/common/fields/serializer.py

@@ -7,7 +7,7 @@ import six
 
 __all__ = [
     'StringIDField', 'StringManyToManyField', 'ChoiceDisplayField',
-    'CustomMetaDictField'
+    'CustomMetaDictField', 'ReadableHiddenField',
 ]
 
 
@@ -44,6 +44,17 @@ class DictField(serializers.DictField):
         return super().to_representation(value)
 
 
+class ReadableHiddenField(serializers.HiddenField):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self.write_only = False
+
+    def to_representation(self, value):
+        if hasattr(value, 'id'):
+            return getattr(value, 'id')
+        return value
+
+
 class CustomMetaDictField(serializers.DictField):
     """
     In use: