more work on serializing tags

utils/tag_serializers.py

@@ -47,16 +47,11 @@ class SingleTagSerializerField(serializers.Field):
         return value
 
 
-class CustomTagSerializer(serializers.ModelSerializer):
+class CustomTagSerializer(serializers.Serializer):
     """
     Differentiate between tags and single-tags
     """
 
-    def __init__(self, instance=None, data='', **kwargs):
-        self.serializer_field_mapping[SingleTagSerializerField] = CharField
-        self.serializer_field_mapping[TagListSerializerField] = ListField
-        super(CustomTagSerializer, self).__init__(instance, data, **kwargs)
-
     def create(self, validated_data):
         to_be_tagged, validated_data = self._pop_tags(validated_data)
 
@@ -149,8 +144,9 @@ class CustomTagSerializer(serializers.ModelSerializer):
 
     def _pop_tags(self, validated_data):
         to_be_tagged = {}
-        for key in self.serializer_field_mapping.keys():
-            field = self.serializer_field_mapping[key]
+
+        for key in self.fields.keys():
+            field = self.fields[key]
             if isinstance(field, TagListSerializerField):
                 if key in validated_data:
                     to_be_tagged[key] = validated_data.pop(key)