NoMethodError in Articles#show

Question

I was using the tutorial on Getting Started with Rails http://tutorials.jumpstartlab.com/projects/blogger.html

I've already finished the tutorial, and now i'm using what i've done to create a site for a school work, i just want to add the "data" file on db/migrate/20161005160810_create_articles.rb, but i`m getting this message error

Showing /home/ubuntu/workspace/app/views/articles/show.html.erb where line #12 raised:
       undefined method `data' for #<Article:0x007f8bcab2cfe8>
        Extracted source (around line #12):

        <p>
          <strong>Data:</strong>
          <%= @article.data %>
        </p>

and my articles_controller is like this

        class ArticlesController < ApplicationController

      http_basic_authenticate_with name: "mateus", password: "mateus", except: [:index, :show]

      def index
        @articles = Article.all
      end

      def show
        @article = Article.find(params[:id])
      end

      def new
        @article = Article.new
      end

      def edit
        @article = Article.find(params[:id])
      end

      def create
        @article = Article.new(article_params)

        if @article.save
          redirect_to @article
        else
          render 'new'
        end
      end

      def update
        @article = Article.find(params[:id])

        if @article.update(article_params)
          redirect_to @article
        else
          render 'edit'
        end
      end

      def destroy
        @article = Article.find(params[:id])
        @article.destroy

        redirect_to articles_path
      end


        def article_params
          params.require(:article).permit(:title, :text, :data)
        end

    end

Could someone help me?

Edit1: I used rake db:migrate:status then i got this:

mateusjs:~/workspace (master) $ rake db:migrate:status

database: app_development

 Status   Migration ID    Migration Name
--------------------------------------------------
   up     20161005160810  Create articles
   up     20161005185521  Create comments
   up     20170209222858  Parte2

Answer 1

Does schema.rb show that your Article has a data attribute? A quick way to test this is to go into your console and

$ bundle exec rails console

> Article

And see if the data is there.

If not, you might need to do two things;

1. Make a migration which is to say go to the terminal and do something like;

$ bundle exec rails g migration AddDataToArticle data:integer

2. After you do that step you need to bundle exec rails db:migrate