"""empty message Revision ID: a0f6c8743362 Revises: 64fee8e5ab34 Create Date: 2020-01-19 19:12:39.402679 """ import sqlalchemy as sa from alembic import op # revision identifiers, used by Alembic. revision = 'a0f6c8743362' down_revision = '64fee8e5ab34' branch_labels = None depends_on = None def upgrade(): op.alter_column('user', 'password', existing_type=sa.VARCHAR(length=255), nullable=False, existing_server_default=sa.text("''::character varying"), server_default='') def downgrade(): op.alter_column('user', 'password', existing_type=sa.VARCHAR(length=255), nullable=True, existing_server_default=sa.text("''::character varying"))