| 1234567891011121314151617181920212223242526 | """add date to state regionRevision ID: 42df131326b1Revises: 1547a089e232Create Date: 2019-09-03 12:13:45.719175"""from alembic import opimport sqlalchemy as sa# revision identifiers, used by Alembic.revision = '42df131326b1'down_revision = '1547a089e232'branch_labels = Nonedepends_on = Nonedef upgrade():    op.add_column('state_region', sa.Column('from_date_time', sa.DateTime(), nullable=True))    op.add_column('state_region', sa.Column('until_date_time', sa.DateTime(), nullable=True))def downgrade():    op.drop_column('state_region', 'until_date_time')    op.drop_column('state_region', 'from_date_time')
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