如何避免短路评估 [英] How to avoid short-circuit evaluation on

问题描述

我正在使用Ruby on Rails，并想验证两个不同的模型:

I'm working with Ruby on Rails and would like to validate two different models :

if (model1.valid? && model2.valid?)
...
end

但是，&&"操作员使用短路评估(即，只有在"model1.valid?"为true时才评估"model2.valid?")，这可以防止在model1无效的情况下执行model2.valids.

However, "&&" operator uses short-circuit evaluation (i.e. it evaluates "model2.valid?" only if "model1.valid?" is true), which prevents model2.valids to be executed if model1 is not valid.

是否有等同于&&"哪个不会使用短路评估?我需要对两个表达式进行求值.

Is there an equivalent of "&&" which would not use short-circuit evaluation? I need the two expressions to be evaluated.

推荐答案

尝试一下:

([model1, model2].map(&:valid?)).all?

如果两个都有效，它将返回true，并在两个实例上创建错误.

It'll return true if both are valid, and create the errors on both instances.

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