Moved custom field serializers to their own module to avoid circular dependency

netbox/extras/api/serializers.py

@@ -1,49 +1,7 @@
-from django.contrib.contenttypes.models import ContentType
-
 from rest_framework import serializers
 
-# from dcim.api.serializers import NestedSiteSerializer
-from extras.models import CustomField, CustomFieldChoice, Graph, TopologyMap
-
-
-#
-# Custom fields
-#
-
-class CustomFieldSerializer(serializers.BaseSerializer):
-    """
-    Extends ModelSerializer to render any CustomFields and their values associated with an object.
-    """
-
-    def to_representation(self, manager):
-
-        # Initialize custom fields dictionary
-        data = {f.name: None for f in self.parent._custom_fields}
-
-        # Assign CustomFieldValues from database
-        for cfv in manager.all():
-            data[cfv.field.name] = cfv.value
-
-        return data
-
-
-class CustomFieldModelSerializer(serializers.ModelSerializer):
-    custom_fields = CustomFieldSerializer(source='custom_field_values')
-
-    def __init__(self, *args, **kwargs):
-
-        super(CustomFieldModelSerializer, self).__init__(*args, **kwargs)
-
-        # Cache the list of custom fields for this model
-        content_type = ContentType.objects.get_for_model(self.Meta.model)
-        self._custom_fields = CustomField.objects.filter(obj_type=content_type)
-
-
-class CustomFieldChoiceSerializer(serializers.ModelSerializer):
-
-    class Meta:
-        model = CustomFieldChoice
-        fields = ['id', 'value']
+from dcim.api.serializers import NestedSiteSerializer
+from extras.models import Graph, TopologyMap
 
 
 #
@@ -69,8 +27,8 @@ class GraphSerializer(serializers.ModelSerializer):
 # Topology maps
 #
 
-class TopologyMapSerializer(CustomFieldModelSerializer):
-    # site = NestedSiteSerializer()
+class TopologyMapSerializer(serializers.ModelSerializer):
+    site = NestedSiteSerializer()
 
     class Meta:
         model = TopologyMap