当我访问photos/show.html.erb
视图时,我从Heroku日志中得到以下错误:
ActionView::Template::Error(没有路由匹配{:action=>"index",:comment_id=>nil,:controller=>"cflags",:photo_id=>"100"}缺少所需密钥:[:comment_id])
我有非常基本的Photo
和Comment
模型,它们可以正常工作,然后我构建了一个用于标记注释的Cflag
模型。我使用@photo.comments
在photos/show.html.erb
视图中列出注释。
显示:
# photos/show.html.erb
<% @photo.comments.each do |comment| %>
<%= form_for(comment, url: photo_comment_cflags_path(@photo, comment)) do |f| %>
<%= f.hidden_field :user_id, value: current_user.id %>
<%= f.submit "Report Inappropiate" %>
<% end %>
<% 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
路线:
resources :photos do
resources :comments, only: [:create, :edit, :destroy] do
resources :cflags, only: :create
end
end
轨道路线:
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
照片控制器:
def show
@photo = Photo.approved.find(params[:id])
end
注释控制器:
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
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"
在Heroku控制台
p = Photo.find(100)
p.comments = => #<ActiveRecord::Associations::CollectionProxy [#<Comment id: 309, content: "hi", photo_id: 100, user_id: 1, created_at: "2016-07-24 04:43:17", updated_at: "2016-07-24 04:43:17", approved: true, cflags_count: nil>
将表单操作更改为this,更新:
<% if @photo.comments.any? %>
<% @photo.comments.each do |comment| %>
# you do not have to use comment in form_for, because this form is for creating cflag
<%= form_for(:cflag, url: photo_comment_cflags_path(@photo, comment), method: "post") do |f| %>
<%= f.hidden_field :user_id, value: current_user.id %>
<%= f.submit "Report Inappropiate" %>
<% end %>
<% end %>
<% end %>
根据Rails文档,form_for
方法的预期参数为(record, options = {}, &block)
。
form_for(record,options={},&block) public
创建允许用户创建或更新属性的窗体特定模型对象的。
该方法可以以几种略有不同的方式使用,具体取决于关于您希望在多大程度上依赖Rails从建模应该如何构建表单。对于通用模型对象,可以通过向
form_for
传递字符串或符号来创建表单表示我们关心的对象:
因此,您可能需要删除在form_for
方法中插入的额外[]
,它应该如下所示:
<% @photo.comments.each do |comment| %>
<%= form_for(Cflag.new, url: photo_comment_cflags_path(@photo, comment)) do |f| %>
<%= f.hidden_field :user_id, value: current_user.id %>
<%= f.submit "Report Inappropiate" %>
<% end %>
<% end %>
我建议你这样尝试,看看它是否能解决你当前的问题。
您的第一个参数是数组,请尝试以下操作:
<%= form_for(comment, url: photo_comment_cflags_path(@photo, comment)) do |f| %>