Introduced ChoiceFieldSerializer for choice fields

netbox/utilities/api.py

@@ -1,5 +1,5 @@
 from rest_framework.exceptions import APIException
-from rest_framework.serializers import ModelSerializer
+from rest_framework.serializers import Field
 
 
 WRITE_OPERATIONS = ['create', 'update', 'partial_update', 'delete']
@@ -10,6 +10,22 @@ class ServiceUnavailable(APIException):
     default_detail = "Service temporarily unavailable, please try again later."
 
 
+class ChoiceFieldSerializer(Field):
+    """
+    Represent a ChoiceField as a list of (value, label) tuples.
+    """
+
+    def __init__(self, choices, **kwargs):
+        self._choices = choices
+        super(ChoiceFieldSerializer, self).__init__(**kwargs)
+
+    def to_representation(self, obj):
+        return self._choices[obj]
+
+    def to_internal_value(self, data):
+        return getattr(self._choices, data)
+
+
 class WritableSerializerMixin(object):
     """
     Allow for the use of an alternate, writable serializer class for write operations (e.g. POST, PUT).