Make DB queries compatible with SQLAlchemy 1.4.x

Change-Id: I25eae9e6de8534b40493caf23cc49602a44efd26
Closes-Bug: #1930908

2 files changed, 10 insertions, 1 deletions

diff --git a/keystone/common/sql/core.py b/keystone/common/sql/core.py
index ed84e5893..89169aaf3 100644
--- a/keystone/common/sql/core.py
+++ b/keystone/common/sql/core.py
@@ -119,6 +119,10 @@ ModelBase.__init__ = initialize_decorator(ModelBase.__init__)
 class JsonBlob(sql_types.TypeDecorator):
 
     impl = sql.Text
+    # NOTE(ralonsoh): set to True as any other TypeDecorator in SQLAlchemy
+    # https://docs.sqlalchemy.org/en/14/core/custom_types.html# \
+    #   sqlalchemy.types.TypeDecorator.cache_ok
+    cache_ok = True
 
     def process_bind_param(self, value, dialect):
         return jsonutils.dumps(value)
@@ -144,6 +148,10 @@ class DateTimeInt(sql_types.TypeDecorator):
 
     impl = sql.BigInteger
     epoch = datetime.datetime.fromtimestamp(0, tz=pytz.UTC)
+    # NOTE(ralonsoh): set to True as any other TypeDecorator in SQLAlchemy
+    # https://docs.sqlalchemy.org/en/14/core/custom_types.html# \
+    #   sqlalchemy.types.TypeDecorator.cache_ok
+    cache_ok = True
 
     def process_bind_param(self, value, dialect):
         if value is None:
diff --git a/keystone/identity/shadow_backends/sql.py b/keystone/identity/shadow_backends/sql.py
index 1d817c038..3e04b332d 100644
--- a/keystone/identity/shadow_backends/sql.py
+++ b/keystone/identity/shadow_backends/sql.py
@@ -98,7 +98,8 @@ class ShadowUsers(base.ShadowUsersDriverBase):
             x for x in hints.filters if x['name'] not in ('idp_id',
                                                           'protocol_id',
                                                           'unique_id')]
-        query = query.filter(sqlalchemy.and_(*statements))
+        if statements:
+            query = query.filter(sqlalchemy.and_(*statements))
         return query
 
     def get_federated_users(self, hints):