Merge " Downgrade in 039 does not delete NS recordsets"

designate/storage/impl_sqlalchemy/migrate_repo/versions/039_support_soa_records.py

@@ -157,6 +157,8 @@ def upgrade(migrate_engine):
 def downgrade(migrate_engine):
     meta.bind = migrate_engine
     dialect = migrate_engine.url.get_dialect().name
+    zones_table = Table('domains', meta, autoload=True)
+    records_table = Table('records', meta, autoload=True)
 
     RECORD_TYPES = ['A', 'AAAA', 'CNAME', 'MX', 'SRV', 'TXT', 'SPF', 'NS',
                     'PTR', 'SSHFP']
@@ -170,6 +172,34 @@ def downgrade(migrate_engine):
     recordsets_table.c.type.alter(type=Enum(name='recordset_types',
                                             *RECORD_TYPES))
 
+    # Remove non-delegated NS records
+    # Get all the zones
+    zones = select(
+        columns=[
+            zones_table.c.id,
+            zones_table.c.created_at,
+            zones_table.c.tenant_id,
+            zones_table.c.name,
+            zones_table.c.email,
+            zones_table.c.serial,
+            zones_table.c.refresh,
+            zones_table.c.retry,
+            zones_table.c.expire,
+            zones_table.c.minimum
+        ]
+    ).execute().fetchall()
+
+    for zone in zones:
+        # for each zone, get all non-delegated NS recordsets
+        results = recordsets_table.select().\
+            where(recordsets_table.c.type == 'NS').\
+            where(recordsets_table.c.name == zone.name).execute()
+        for r in results:
+            records_table.delete().\
+                where(records_table.c.recordset_id == r.id).\
+                where(records_table.c.managed == 1).execute()
+        # NOTE: The value 1 is used instead of True because flake8 complains
+
     # Re-add the constraint for sqlite
     if dialect.startswith('sqlite'):
         constraint = UniqueConstraint('domain_id', 'name', 'type',