0718ed97e5b3_add_tablename_to_resource_type.py 文件源码

def upgrade():
    op.add_column("resource_type", sa.Column('tablename', sa.String(18),
                                             nullable=True))

    resource_type = sa.Table(
        'resource_type', sa.MetaData(),
        sa.Column('name', sa.String(255), nullable=False),
        sa.Column('tablename', sa.String(18), nullable=True)
    )
    op.execute(resource_type.update().where(
        resource_type.c.name == "instance_network_interface"
    ).values({'tablename': op.inline_literal("'instance_net_int'")}))
    op.execute(resource_type.update().where(
        resource_type.c.name != "instance_network_interface"
    ).values({'tablename': resource_type.c.name}))

    op.alter_column("resource_type", "tablename", type_=sa.String(18),
                    nullable=False)
    op.create_unique_constraint("uniq_resource_type0tablename",
                                "resource_type", ["tablename"])