no log: hide warning during initial database migration

migrations/versions/dc09994b7e65_.py

@@ -7,6 +7,8 @@
 """
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy import exc as sa_exc
+import warnings
 
 try:
     from psycopg2.errors import UndefinedObject
@@ -46,6 +48,7 @@ def column_type(table_name, column_name):
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
+    warnings.filterwarnings("ignore", category=sa_exc.SAWarning)
 
     # Update announcements table
     with op.batch_alter_table('table_announcements') as batch_op:
@@ -266,6 +269,8 @@ def upgrade():
                              'table_movies_rootfolder_pkey CASCADE;')
         batch_op.alter_column(column_name='id', existing_type=sa.INTEGER(), nullable=False, autoincrement=True)
         batch_op.create_primary_key(constraint_name='pk_table_movies_rootfolder', columns=['id'])
+
+    warnings.filterwarnings("default", category=sa_exc.SAWarning)
     # ### end Alembic commands ###