1 files changed, 53 insertions, 0 deletions
diff --git a/neutron/objects/port/extensions/port_hints.py b/neutron/objects/port/extensions/port_hints.py
new file mode 100644
index 0000000000..a9fd1c793f
--- /dev/null
+++ b/neutron/objects/port/extensions/port_hints.py
@@ -0,0 +1,53 @@
+# Copyright 2023 Ericsson Software Technology
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from neutron_lib.objects import common_types
+
+from neutron.db.models import port_hints
+from neutron.objects import base
+
+
+@base.NeutronObjectRegistry.register
+class PortHints(base.NeutronDbObject):
+    # Version 1.0: Initial version
+    VERSION = '1.0'
+
+    db_model = port_hints.PortHints
+
+    primary_keys = ['port_id']
+
+    fields = {
+        'port_id': common_types.UUIDField(),
+        'hints': common_types.DictOfMiscValuesField(),
+    }
+
+    foreign_keys = {'Port': {'port_id': 'id'}}
+
+    @classmethod
+    def modify_fields_to_db(cls, fields):
+        result = super(PortHints, cls).modify_fields_to_db(fields)
+        if 'hints' in result:
+            # dump field into string, set '' if empty '{}' or None
+            result['hints'] = (
+                cls.filter_to_json_str(result['hints'], default=''))
+        return result
+
+    @classmethod
+    def modify_fields_from_db(cls, db_obj):
+        fields = super(PortHints, cls).modify_fields_from_db(db_obj)
+        if 'hints' in fields:
+            # load string from DB into dict, set None if hints is ''
+            fields['hints'] = (
+                cls.load_json_from_str(fields['hints']))
+        return fields