👷 Add ty to precommit (#2227)

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

backend/app/alembic/env.py

@@ -63,6 +63,7 @@ def run_migrations_online():
 
     """
     configuration = config.get_section(config.config_ini_section)
+    assert configuration is not None
     configuration["sqlalchemy.url"] = get_url()
     connectable = engine_from_config(
         configuration,

backend/app/alembic/versions/1a31ce608336_add_cascade_delete_relationships.py

@@ -29,7 +29,7 @@ def upgrade():
 
 def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_constraint(None, 'item', type_='foreignkey')
+    op.drop_constraint('item_owner_id_fkey', 'item', type_='foreignkey')
     op.create_foreign_key('item_owner_id_fkey', 'item', 'user', ['owner_id'], ['id'])
     op.alter_column('item', 'owner_id',
                existing_type=sa.UUID(),