helper_method(*meths) public

Declare a controller method as a helper. For example, the following makes the current_user controller method available to the view:

class ApplicationController  < ActionController ::Base
 helper_method  :current_user, :logged_in?
 def current_user
 @current_user ||= User .find_by(id: session[:user])
 end
 def logged_in?
 current_user != nil
 end
end

In a view:

<% if logged_in? -%>Welcome, <%= current_user.name %><% end -%>

Parameters

  • method[, method] - A name or names of a method on the controller to be made available on the view.

Show source 
# File actionpack/lib/abstract_controller/helpers.rb, line 63
 def helper_method(*meths)
 meths.flatten!
 self._helper_methods += meths
 meths.each do |meth|
 _helpers.class_eval def #{meth}(*args, &blk) # def current_user(*args, &blk) controller.send(%(#{meth}), *args, &blk) # controller.send(:current_user, *args, &blk) end # end, __FILE__, __LINE__ + 1
 end
 end
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