Rails - ActionController::UrlGenerationError 没有路由匹配缺少必需的键：[:id]

Question

我在我的 Rails 应用程序中尝试对 Comments MVC 进程实施编辑功能时遇到上述错误。

这是出现错误的视图代码 -

_cmets.html.erb

<% if user_signed_in?  %>
      <p><%= link_to "Edit", edit_event_comment_path(@event, comment), remote: true %></p>
      <p><%= link_to 'Delete', [comment.event, comment],
                  method: :delete,
                  class: "button",
                  data: { confirm: 'Are you sure?' } %></p>
      <% end %>

这是 cmets 控制器代码 -

Comments_controller.rb

class CommentsController < ApplicationController
    before_action :set_comment, only: [:show, :edit, :update, :destroy]


    def create
        @event = Event.find(params[:event_id])
        @comment = @event.comments.create!(params[:comment].permit(:name, :body))
        @comment.user_id = current_user.id


        redirect_to @event
    end

    # GET /comments/1/edit
    def edit
        respond_to do |f|
            f.js 
            f.html 
        end
    end

    def update


        respond_to do |format|
            if @comment.update
                format.html { redirect_to @comment, notice: 'Comment was successfully updated.' }
                format.js   { }
                format.json { render :show, status: :created, location: @comment }
            else
                format.html { render :new }
                format.json { render json: @comment.errors, status: :unprocessable_entity }
            end
        end
    end



    def destroy
        @event = Event.find(params[:event_id])
        @comment = @event.comments.find(params[:id])
        @comment.destroy

        redirect_to event_path(@event)
    end

    private
    # Use callbacks to share common setup or constraints between actions.
    def set_comment
      @comment = Comment.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def comment_params
      params.require(:comment).permit(:event_id, :body)
    end


end

这是我的路线 -

我已将 cmets 设置为事件的嵌套路由，因此路由路径是正确的。我已经尝试了一些不同的变体作为反复试验，但我仍然遇到错误。我确信答案正盯着我看，但我需要另一双眼睛的帮助。任何帮助表示赞赏。

Answer 1

根据你的代码，如果你没有循环@comments，

comment 应该是@comment

<% if user_signed_in?  %>
      <p><%= link_to "Edit", edit_event_comment_path(@event, @comment), remote: true %></p>
      <p><%= link_to 'Delete', [@comment.event, @comment],
                  method: :delete,
                  class: "button",
                  data: { confirm: 'Are you sure?' } %></p>
 <% end %>

另外，将您的编辑操作更改为，

   def edit
        @event = @comment.event
        respond_to do |f|
            f.js 
            f.html 
        end
    end