db: add segment_index to the unique constraint

For multi segments support we have update the unique contraint so
`segment_index` will be part of it.

Related-Bug: #1791233
Partial-Bug: #1956435
Partial-Bug: #1764738
Signed-off-by: Sahid Orentino Ferdjaoui <sahid.ferdjaoui@industrialdiscipline.com>
Change-Id: Ic564131dcd7525fc5f24c3282688e3584cd2e2e0

neutron/cmd/upgrade_checks/checks.py

@@ -119,7 +119,8 @@ def get_duplicate_network_segment_count():
     query = query.group_by(
         segment.NetworkSegment.network_id,
         segment.NetworkSegment.network_type,
-        segment.NetworkSegment.physical_network
+        segment.NetworkSegment.physical_network,
+        segment.NetworkSegment.segment_index,
     )
     query = query.having(func.count() > 1)
     return query.count()

neutron/db/migration/alembic_migrations/versions/EXPAND_HEAD

@@ -1 +1 @@
-5881373af7f5
+fc153938cdc1

neutron/db/migration/alembic_migrations/versions/antelope/expand/fc153938cdc1_update_segment_networks_constraint.py

@@ -0,0 +1,63 @@
+# Copyright 2022 OpenStack Foundation
+#
+#    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 alembic import op
+import sqlalchemy as sa
+
+from neutron.db import migration
+
+
+"""update segment networks constraint
+
+Revision ID: fc153938cdc1
+Revises: 5881373af7f5
+Create Date: 2022-11-06 13:04:26.390013
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'fc153938cdc1'
+down_revision = '5881373af7f5'
+
+TABLE_NAME = 'networksegments'
+
+
+def upgrade():
+    inspector = sa.inspect(op.get_bind())
+
+    fk_constraints = inspector.get_foreign_keys(TABLE_NAME)
+    for fk in fk_constraints:
+        if fk['constrained_columns'] == ['network_id']:
+            migration.remove_foreign_keys(TABLE_NAME, [fk])
+            op.drop_constraint(
+                constraint_name=(
+                    'uniq_networksegment0network_id0network_type0'
+                    'physical_network'),
+                table_name=TABLE_NAME,
+                type_='unique')
+            migration.create_foreign_keys(TABLE_NAME, [fk])
+    op.create_unique_constraint(
+        ('uniq_networksegment0network_id0network_type0physnet0sidx'),
+        TABLE_NAME,
+        ['network_id', 'network_type', 'physical_network', 'segment_index'])
+
+
+def expand_drop_exceptions():
+    """We want to drop the old constraint before to add the new one"""
+    return {
+        sa.Constraint: [
+            'uniq_networksegment0network_id0network_type0physical_network'],
+        sa.ForeignKeyConstraint: ['networksegments_ibfk_1',
+                                  'ml2_network_segments_network_id_fkey']}

neutron/db/models/segment.py

@@ -58,8 +58,9 @@ class NetworkSegment(standard_attr.HasStandardAttributes,
             network_id,
             network_type,
             physical_network,
+            segment_index,
             name='uniq_networksegment0network_id0'
-                 'network_type0physical_network'),
+                 'network_type0physnet0sidx'),
         model_base.BASEV2.__table_args__
     )
 

neutron/tests/unit/plugins/ml2/test_plugin.py

@@ -2999,7 +2999,7 @@ class TestMultiSegmentNetworks(Ml2PluginV2TestCase):
         res = network_req.get_response(self.api)
         self.assertEqual(400, res.status_int)
 
-    def test_create_network_duplicate_partial_segments_fail(self):
+    def test_create_network_duplicate_partial_segments(self):
         data = {'network': {'name': 'net1',
                             mpnet_apidef.SEGMENTS:
                             [{pnet.NETWORK_TYPE: 'vlan',
@@ -3011,7 +3011,7 @@ class TestMultiSegmentNetworks(Ml2PluginV2TestCase):
         retry_fixture.setUp()
         network_req = self.new_create_request('networks', data)
         res = network_req.get_response(self.api)
-        self.assertEqual(409, res.status_int)
+        self.assertEqual(201, res.status_int)
 
     def test_release_network_segments(self):
         data = {'network': {'name': 'net1',