bundle exec rails generate migration add_is_shown_to_articles

class AddIsShownToArticles < ActiveRecord::Migration
   def change
      add_column :articles, :is_shown, :boolean, default: false, comment: '默认不显示，后期自己选择是否显示'
   end
 end               

<div>

  <%= form.label :'是否隐藏' %>

  <%= form.select :is_shown, options_for_select([['true', 1], ['false', 0]], params[:is_shown]) %>

</div>

def  index

    @articles = @articles.where('is_shown = ?', false)

end

def   create

    @article.is_shown = params[:article][:is_shown]

end

def  update

     @article.is_shown = params[:article][:is_shown]

end

def article_params
    params.require(:article).permit(:title, :content, :category_id, :is_top, :is_shown)
end