ruby on rails - How to prevent a button appearing in index.html.erb if a condition has been met -

ok, have in articles index.html.erb

<td><%= pluralize(article.likes.count, "like") %></td> <td><%= button_to '+1', "/articles/#{article.id}/user/#{current_user.id}/like_vote", method: :post %></td> 

but if voter has liked article, how prevent button showing in index.html.erb? there simple way prevent button showing in index.html.erb?

this method in articlescontroller:

def like_vote   @article = article.find(params[:id])   @user_id = params[:user_id]   likes = like.where("user_id = ? , article_id = ?", @user_id, @article.id )    if likes.blank?     @article.likes.create(user_id: current_user.id)   end   redirect_to(article_path) end 

rails provides optimal way i.e., scope set of constraints on database interactions (such condition, limit, or offset) chainable , reusable.

add scope like model below:

class < activerecord::base   scope :voted_count, ->(user_id, article_id) { where("user_id = ? , article_id = ?", user_id, article_id).count }     end 

update view below:

<td><%= pluralize(article.likes.count, "like") %></td> <td><%= button_to('+1', "/articles/#{article.id}/user/#{current_user.id}/like_vote", method: :post) if like.voted_count(current_user.id, article.id) == 0  %></td>