How to retain validation error messages after reload?

I am running several validations in my foo model. Here is how I am handling the create and update actions:

if @foo.update_attributes(params[:foo])
  #party time   
else
  @foo.reload #here is the issue
  render :action => "new" #or edit
end

I have to reload the attribute开发者_如何学运维s because I am using the default form values to run unrelated javascript. The problem is that by reloading the attributes, I apparently lose @foo.errors. Is there a way that I can pass them to the new reloaded variable? I would prefer this over using javascript to prevent the bad form submission. Thanks!

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The reload method is obviously not for that. You can: 1. define your method for reverting the values 2. save the errors and then re-assign 3. merge attributes to the @foo from freshly loaded instance.

All of these solutions are very hackish and are not recommended. If I were you, I'd rethink the way things should work.