Enabling lazy evaluation is simple but varies slightly depending on the association type.

启用惰性抓取很简单，但是根据关联类型的不同，有细微的差异。

youdao

Finally, field-invariant tests are only evaluated after field reads and writes, to permit lazy evaluation.

最后，字段的不变条件测试只是在读写字段之后才进行，以便允许惰性计算。

youdao

Finally, field-invariant tests are only evaluated after field reads and writes, to permit lazy evaluation.

最后，字段的不变条件测试只是在读写字段之后才进行，以便允许惰性计算。

youdao