rails new bbs rails generate scaffold article content:string rails db:migrate サーバー起動 rails s localhost:3000 #カラム追加 rails generate migration AddNameToArticle name:string rails db:migrate #index.html.erb <%= article.name %> #show.html.erb <%= @article.name %> #_form.html.erb <%= f.label :name %> <%= f.text_field :name %> #article_controller.rb def article_params params.require(:article).permit(:content, :name) end rails g scaffold Memo title:string body:text rails db:migrate rails s localhost:3000