Ruby on Rails passing controller variables to view

Question

Hello I am having difficulties understanding why the parameter is not passing to the view.

controller

class UsersController < ApplicationController
  include UsersHelper

  before_filter :set_user, :set_categories
  def show
    @test = get_test()
  end
end

helper

module UsersHelper
   def get_test()
     puts "hello world"
   end
end

view

test:  <%= @test %>

What is being displayed test:

Can someone please give me some assistance of why hello world is not being displayed? Thanks!

--Edit-- It seems like I am not able to even pass any variable messages to the view I added...

controller

@message = "How are you"

view

<p><%= @message %></p>

And How are you is not displaying.

have you defined @message inside relevant action?

BroiSatse
– BroiSatse

2014-01-26 23:38:40 +00:00
Commented Jan 26, 2014 at 23:38 — BroiSatse
– BroiSatse, Commented Jan 26, 2014 at 23:38

revolver · Accepted Answer · 2014-01-26 23:39:34Z

3

In your get_test function, you are printing a string instead of returning the string. To return a string:

module UsersHelper
   def get_test()
     "hello world"
   end
end

edited Jan 26, 2014 at 23:39

answered Jan 26, 2014 at 23:32

revolver

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3 Comments

AustinT Over a year ago

Thanks that did solve the problem! would you have happen to know how to solve my edit?

AustinT Over a year ago

How would you return a variable, would it just be @hello = "hello world"? Or would it just hello = "hello world", and it would return the local variable?

revolver Over a year ago

Sorry. I don't quite understand you. You mean to assign a string to a variable? To return a string from the function you do return "hello world". To let a view access the variable you often have to assign it to a instance variable, which is @hello = "hello world". hello without @ would be local variable.

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