Current_page? is not defined in Rails 5?

Question

I have two views quotation.html.erb and calculate.html.erb . I have quotation.html.erb set up correctly. Data will be retrieved from tints entity when the drop down menu is chosen correctly from the form in quotation.html.erb . It will then generate a quotation by rendering a view, generate.html.erb

This is what I have for my tints_controller.rb

def calculator
  render 'calculator'
end

def quotation
  render 'quotation'
end

def generate
  // a lot of formulas here
  // @measurements will get the measurement from tint entity
    if current_page?(:controller => 'tints', :action => 'quotation') //this is my question
      @measurements_front = @measurements.front
      @measurements_side = @measurements.side
      @measurements_rear = @measurements.rear
      @measurements_roof = @measurements.roof
    else
      @measurements_front = params[:front]
      @measurements_side = params[:side]
      @measurements_rear = params[:rear]
      @measurements_roof = params[:roof]
    end
end

Now I am trying to create a page, calculate.html.erb , for users to input value in the text_field instead of selecting from the available data from the drop down menu. User will input values (as in integer) manually (front, side, rear, roof) and submit the form to get quotation from the view generate.html.erb

So here is my question. I am trying to use current_page? helper to see what page the user is in. If the user is in quotation.html.erb , it will get the @measurements from the table. If the user is in calculate.html.erb , it will get the :front, :side, :rear: roof .

I tried several methods and I still get the error undefined method current_page?' . Does . Does current_page?` still exists in Rails 5 or we have to define it by ourselves?

Also, I have my routes.rb set up as below.

//More routes here
get '/quotation/tints' => 'tints#quotation', :as => 'tints_quotation'
get '/calculator/tints' => 'tints#calculator', :as => 'tints_calculator'
post '/quotation/tints/generate' => 'tints#generate', :as => 'generate_tints_quotation'
post '/calculator/tints/generate' => 'tints#generate', :as => 'generate_tints_calculator'

Answer 1

current_page? still exists in Ruby on Rails 5.

But it is a view helper method and therefore not available in the context of a controller.