Add an controller to application.html.erb layout

Question

I want to build an app which handles multiple pages, and the user can add to the app (from a form) a page, then add the added page to a pages table. (Normally)

All of this I know how to do and I don't have any issues at it.

The problem is that I want to create a menu in application.html.erb, but I need to get the pages table data from a controller, so I tried to pass regular instance variables from application_controller.rb to application.html.erb, and it didn't work.

In application_controller.rb:

    @foo = "bar"

In application.html.erb:

   <%= @foo %>

I don't even get an error, there is just nothing in the view. (I mean the variable isn't there, I can still see other content)

How can I attach a controller for application.html.erb? (Or pass variables to application.html.erb) Thanks for any help.

SOLUTION: In you application_controller you can do

    before_action :set_page


    def set_page
      @foo = "bar"
    end

This will run the set_page action before every action in your application which should accomplish what you want.

Thanks to ruby_newbie!!!!

ruby_newbie · Accepted Answer · 2016-06-22 18:56:51Z

3

In you application_controller you can do

before_action :set_page


def set_page
  @foo = "bar"
end

This will run the set_page action before every action in your application which should accomplish what you want.

answered Jun 22, 2016 at 18:56

ruby_newbie

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1 Comment

shabenda Over a year ago

Thanks! It is working! +1 and I'll mark your answer as the solution in 9 mins... :D

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