/ Ruby on Rails
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method

add_template_helper

rails latest stable - Class: ActionMailer::Helpers::ClassMethods

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2.3.8) is shown here.

add_template_helper(helper_module)
public

Makes all the (instance) methods in the helper module available to templates rendered through this controller. See ActionView::Helpers (ActionView::Helpers) for more about making your own helper modules available to the templates.