Added rollback method to ActiveModel::Dirty

[igor04]

Maybe I have missed something but looks like rollback changes should be presented here

[estsauver]

Hey @igor04

What's the difference between this and reset_changes? Am I missing something? It looks to me like they both do the same things?

~Earl

[igor04]

Hi @estsauver

Not exactly, reset_changes - when you want to reset the changes information not rollback value, just delete information about changes. After reset_changes attribute will have new value but it will look like attribute has not been changed (because data about changes is deleted).

[timraymond]

@igor04 So reset_changes will only make it appear as though nothing has changed, even though any changes that you've made still stick around? If that's the case, I'd say this patch is a win.

[sgrif]

This should call changed_attributes.each_key, changed gets overridden by ActiveRecord::AttributeMethods::Dirty to include in-place mutations.