Using View page, Controller and Helper

I am new in Rails. And I have a project that; I should get a value from user in View page (for example index), and I should use the value in Helper then send the result of Helper to Controller and show the result in a new View page (for example details). Additionally I have to save results to database. Right now I have helper, controller and view pages but I can't connect these three part to each other. I need help

Controller;

def index
    @user = Mpeople.new[:user]
    redirect_to "secondstep"
  end

  def secondstep
    # helper should have controled here
    redirect_to "following"
  end

  def following
    @user = Mpeople.all
  end

Model;

class Mpeople < ActiveRecord::Base
  has_one :username
  accepts_nested_attributes_for :usern开发者_如何学编程ame
end

View;

<% form_for :user, :url => {:action => "index"} do |pform| %>

  <% pform.fields_for :person do |namefield| %>
    Twitter Name : <%= namefield.text_field :username %>
    <%= button_to "OK", :action => "following" %>
  <% end %>
<% end %>

And helper is more longer, it sends twitter name to twitter and get following of a user from api.twitter.com

This is some of my helper; I edit it after your comment but I am not sure if it is correct or not.

module FafHelper

  class PeopleController
    require 'people_helper'
    # txtname = indexteki textbox'un adına eşitle
    #txtname = tname
    txtname = namefiled.text_field
    .....
    a_get("1/users/lookup.#{json}").
                      with(:query => {:screen_name => txtname, :user_id => id_list}).
end
end
..

---

You no need to connect views and helper as by default all the helper modules are included in the views. And do include the helper in you controller. Helper is a module and controller is a class. Just include the module in the class.

To get the clear picture please post exactly your structure.