Refactor REST API serializers to avoid circular imports

netbox/dcim/api/serializers_/roles.py

@@ -0,0 +1,43 @@
+from rest_framework import serializers
+
+from dcim.models import DeviceRole, InventoryItemRole
+from extras.api.serializers_.provisioning import ConfigTemplateSerializer
+from netbox.api.fields import RelatedObjectCountField
+from netbox.api.serializers import NetBoxModelSerializer
+
+__all__ = (
+    'DeviceRoleSerializer',
+    'InventoryItemRoleSerializer',
+)
+
+
+class DeviceRoleSerializer(NetBoxModelSerializer):
+    url = serializers.HyperlinkedIdentityField(view_name='dcim-api:devicerole-detail')
+    config_template = ConfigTemplateSerializer(nested=True, required=False, allow_null=True, default=None)
+
+    # Related object counts
+    device_count = RelatedObjectCountField('devices')
+    virtualmachine_count = RelatedObjectCountField('virtual_machines')
+
+    class Meta:
+        model = DeviceRole
+        fields = [
+            'id', 'url', 'display', 'name', 'slug', 'color', 'vm_role', 'config_template', 'description', 'tags',
+            'custom_fields', 'created', 'last_updated', 'device_count', 'virtualmachine_count',
+        ]
+        brief_fields = ('id', 'url', 'display', 'name', 'slug', 'description', 'device_count', 'virtualmachine_count')
+
+
+class InventoryItemRoleSerializer(NetBoxModelSerializer):
+    url = serializers.HyperlinkedIdentityField(view_name='dcim-api:inventoryitemrole-detail')
+
+    # Related object counts
+    inventoryitem_count = RelatedObjectCountField('inventory_items')
+
+    class Meta:
+        model = InventoryItemRole
+        fields = [
+            'id', 'url', 'display', 'name', 'slug', 'color', 'description', 'tags', 'custom_fields', 'created',
+            'last_updated', 'inventoryitem_count',
+        ]
+        brief_fields = ('id', 'url', 'display', 'name', 'slug', 'description', 'inventoryitem_count')