instance method `helper_method`

Ruby on Rails 4.0.13

Since v3.0.20

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

helper_method(*meths)

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.

Parameters

meths rest

Source

# File actionpack/lib/abstract_controller/helpers.rb, line 46
      def helper_method(*meths)
        meths.flatten!
        self._helper_methods += meths

        meths.each do |meth|
          _helpers.class_eval <<-ruby_eval, __FILE__, __LINE__ + 1
            def #{meth}(*args, &blk)                               # def current_user(*args, &blk)
              controller.send(%(#{meth}), *args, &blk)             #   controller.send(:current_user, *args, &blk)
            end                                                    # end
          ruby_eval
        end
      end

Defined in actionpack/lib/abstract_controller/helpers.rb line 46 · View on GitHub · Improve this page · Find usages on GitHub

Defined in AbstractController::Helpers::ClassMethods

Signature

Parameters

Parameters