6e7ff4c3177e_remove_batches.py 文件源码

def downgrade():
    """Downgrade the database to an older revision."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('batches_versions',
                    sa.Column('version_id', sa.INTEGER(), autoincrement=False, nullable=True),
                    sa.Column('batch_token', sa.INTEGER(), autoincrement=False, nullable=True),
                    sa.Column('id', sa.INTEGER(), autoincrement=False, nullable=False),
                    sa.ForeignKeyConstraint(['batch_token'], ['batch.token'],
                                            name='batches_versions_batch_token_fkey'),
                    sa.ForeignKeyConstraint(['version_id'], ['versions.id'],
                                            name='batches_versions_version_id_fkey'))
    op.create_table('batch',
                    sa.Column('token', sa.INTEGER(), nullable=False),
                    sa.Column('started_at', postgresql.TIMESTAMP(), autoincrement=False,
                              nullable=True),
                    sa.PrimaryKeyConstraint('token', name='batch_pkey'))
    # ### end Alembic commands ###