Question

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

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

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.

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

Answer 1

Try this:

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

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