Partial Validation in Rails

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It happens sometimes that you have to implement creation or editing of a model splitted on more than one form. A classic case is a registration form divided into two steps or a guided wizard with several pages.This situation presents us with a problem: when and how to validate data?The first idea that may come to mind is simply to leave it all validations in the last page when you go to create or update the model. But this is also the least elegant solutions, both in ...

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