我想在我的评论控制器中编写我的删除方法.我的评论模型与其他模型有多态关联,但在这种情况下,我们只关注旅行.换句话说,@ trip = @commentable.
注释被删除就好了,但我在CommentsController中不断收到错误ActionController :: ActionControllerError#destroy:无法重定向到nil!当我redirect_to @commentable这将是评论属于的旅行.
我还在我的创建操作(注释控制器)中重定向到@commentable,并且在用户创建新注释时工作正常.
有小费吗?
view(trips / show.html.erb)
<% if !@commentable.comments.empty? %> <% @commentable.comments.each do |comment| %> <!-- Content --> <%= link_to comment,:method => :delete do %> delete <% end %> <% end %> <% end %>
适用于创建操作的注释表单
<%= form_for [@commentable,Comment.new] do |f| %> <%= f.text_area :content %> <div id="comment_submit_button"><%= f.submit "Comment" %></div> <% end %>
trips_controller.rb
def show @trip = @commentable = Trip.find(params[:id]) @comments = Comment.all end
comments_controller.rb
def create @commentable = find_commentable @comment = @commentable.comments.build(params[:comment]) @comment.user_id = current_user.id if @comment.save redirect_to @commentable end end def destroy # @commentable = find_commentable this line was wrong @comment = Comment.find(params[:id]) @commentable = @comment.commentable #this line fixed it if @comment.destroy redirect_to @commentable end end def find_commentable params.each do |name,value| if name =~ /(.+)_id$/ return $1.classify.constantize.find(value) end end nil end