ActionView::Template::Error (#<#<Class:0x007f423040d570>:0x007f42300dd170> 的未定义方法 `comment_cflags_path'

Question

我有一个非常基本的照片和评论模型，它可以工作，然后我构建了一个用于标记 cmets 的 Cflag 模型。当我访问 photos/show.html.erb 视图时，我从 Heroku 日志中收到以下错误：

ActionView::Template::Error（未定义的方法 `comment_cflags_path' 对于#

显示：

photos/show.html.erb
.
<% @photo.comments.each do |comment| %>
  <%= form_for([comment, Cflag.new]) do |f| %>
    <%= f.hidden_field :user_id, value: current_user.id %>
    <%= f.submit "Report Inappropiate" %>
  <% end %>
<% end %> 

路线：

resources :photos do
  resources :comments do
    resources :cflags
  end
end

铁路路线：

    photo_comment_cflags GET        /photos/:photo_id/comments/:comment_id/cflags(.:format)          cflags#index
                         POST       /photos/:photo_id/comments/:comment_id/cflags(.:format)          cflags#create
 new_photo_comment_cflag GET        /photos/:photo_id/comments/:comment_id/cflags/new(.:format)      cflags#new
edit_photo_comment_cflag GET        /photos/:photo_id/comments/:comment_id/cflags/:id/edit(.:format) cflags#edit
     photo_comment_cflag GET        /photos/:photo_id/comments/:comment_id/cflags/:id(.:format)      cflags#show
                         PATCH      /photos/:photo_id/comments/:comment_id/cflags/:id(.:format)      cflags#update
                         PUT        /photos/:photo_id/comments/:comment_id/cflags/:id(.:format)      cflags#update
                         DELETE     /photos/:photo_id/comments/:comment_id/cflags/:id(.:format)      cflags#destroy
PhotosController
def show
  @photo = Photo.approved.find(params[:id])
end

照片控制器：

def create
   @photo = Photo.find(params[:photo_id])
   @comment = @photo.comments.build(comment_params)
   @comment.save
   respond_to do |format|
     format.html { redirect_to :back }
     format.js 
   end 
end   

Cflag 模型：

class Cflag < ActiveRecord::Base
  belongs_to :comment, counter_cache: true
  belongs_to :user, counter_cache: true
  validates :user_id, presence: true 
  validates :comment_id, presence: true
  validates :user_id, uniqueness: { 
    scope: [:comment_id],
    message: 'You can only flag a comment once. Thank you for your feedback.'
  }
  default_scope -> { order(created_at: :desc) }
end

Cflags 控制器：

class CflagsController < ApplicationController
before_action :logged_in_user

def new
end

def create
  @comment = Comment.find(params[:comment_id])
  @cflag = @comment.cflags.build(cflag_params)
    if @cflag.save
      if @comment.cflags_count > 1
        @comment.update_attribute(:approved, false)  
        flash[:success] = "Flag created! Comment ##{@comment.id} has been removed for review. Thank you for your feedback"
        redirect_to :back
      else    
        flash[:success] = "Flag created! Thank you for your feedback"
        redirect_to :back
      end
    else
      redirect_to :back, notice: @cflag.errors.full_messages  
    end    
  end    

  private 
    def cflag_params
      params.require(:cflag).permit(:user_id, :comment_id).merge(user_id: current_user.id)
    end
end

架构：

create_table "cflags", force: :cascade do |t|
  t.integer  "comment_id"
  t.integer  "user_id"
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
end

add_index "cflags", ["comment_id"], name: "index_cflags_on_comment_id"
add_index "cflags", ["user_id"], name: "index_cflags_on_user_id"

我把表格改成：

<% @photo.comments.each do |comment| %>
  <%= form_for([comment, url: photo_comment_cflags_path]) do |f| %>
    <%= f.hidden_field :user_id, value: current_user.id %>
    <%= f.submit "Report Inappropiate" %>
  <% end %>
<% end %>

从Heroku:得到以下错误

ActionView::Template::Error (没有路由匹配 {:action=>"index", :controller=>"cflags", :id=>"100"} 缺少必需的键： [:comment_id, :photo_id]):

Answer 1

看看你的路线：

/photos/:photo_id/comments/:comment_id/cflags(.:format)          

您的路径还需要photo_id。

您的form_for 中缺少@photo。只需将form_for 更改为：

<%= form_for([@photo, comment, Cflag.new]) do |f| %>