¿How to access exposures from Views and/or Helpers?

questions
1

Hi!

Lets say I access the exposed flash from a template:

- unless flash[:success_messages].nil?
    - flash[:success_messages].each do |success_message|
        .alert.alert-success role="alert"
            = success_message

- unless flash[:info_messages].nil?
    - flash[:info_messages].each do |info_message|
        .alert.alert-info role="alert"
            = info_message

- unless flash[:warning_messages].nil?
    - flash[:warning_messages].each do |warning_message|
        .alert.alert-warning role="alert"
            = warning_message

- unless flash[:error_messages].nil?
    - flash[:error_messages].each do |error_message|
        .alert.alert-danger role="alert"
            = error_message

Now, I would like to refactor that template to something like

- success_flash_messages.each do |success_message|
    .alert.alert-success role="alert"
        = success_message

- info_flash_messages.each do |info_message|
    .alert.alert-info role="alert"
        = info_message

- warning_flash_messages.each do |warning_message|
    .alert.alert-warning role="alert"
        = warning_message

- error_flash_messages.each do |error_message|
    .alert.alert-danger role="alert"
        = error_message

For that I want to create a Web::Helper::FlashMessages.
Now the question: is there a way I can expose the flash method to the Helper as well? Or the right way of doing something like that is something like:

- success_messages_from(flash).each do |success_message|
    .alert.alert-success role="alert"
        = success_message

- info_messages_from(flash).each do |info_message|
    .alert.alert-info role="alert"
        = info_message

- warnings_messages_from(flash).each do |warning_message|
    .alert.alert-warning role="alert"
        = warning_message

- error_messages_from(flash).each do |error_message|
    .alert.alert-danger role="alert"
        = error_message

So, as a more general question: can exposures be exposed to Views and Helpers as well? Or would that be a bad practice?

Thanks!
Martin