Deleting comments result as undefined method `comment_path'?

When I tried to delete comments, the comments were not deleted from database and there is also an error undefined method `comment_path'...

_comment.html.erb

 <% if current_user?(comment.user) %>
   <%= link_to "delete", comment, method: :delete %>
 <% end %>

comments_controller.rb

 def destroy
   @comment.destroy
   flash[:success] = "Micropost deleted"
   redirect_to request.referrer || root_url
 end

microposts_controller.rb

 def show
    @user = User.find(params[:id])
    @microposts = @user.microposts.paginate(page: params[:page])
    @comments = @micropost.comments
 end

routes.rb

 resources :microposts do
    resources :comments
 end