2df8c40ab250_add_default_package_flag.py 文件源码

def upgrade():
    bind = op.get_bind()
    op.add_column('packages', sa.Column('is_default', sa.Boolean(), nullable=True))
    op.create_unique_constraint(None, 'packages', ['is_default'])
    bind.execute("UPDATE packages SET is_default=true WHERE id in (SELECT MIN(id) FROM packages)")