我阅读了这些http://railscasts.com/episodes/154-polymorphic-association-revised帖子并按原样实施。但我想在这个tuotorial中添加编辑和删除功能。 我有comments_controller.rb就像这样
class CommentsController < ApplicationController
before_filter :load_commentable
def index
@comments = @commentable.comments
end
def new
@comment = @commentable.comments.new
end
def create
@comment = @commentable.comments.new(params[:comment])
if @comment.save
redirect_to @commentable, notice: "Comment created."
else
render :new
end
end
private
def load_commentable
resource, id = request.path.split('/')[1, 2]
@commentable = resource.singularize.classify.constantize.find(id)
end
# def load_commentable
# klass = [Article, Photo, Event].detect { |c| params["#{c.name.underscore}_id"] }
# @commentable = klass.find(params["#{klass.name.underscore}_id"])
# end
end
我给出的_comments.html.erb就像这样
<div id="comments">
<% @comments.each do |comment| %>
<div class="comment">
<%= simple_format comment.content %>
</div>
<% end %>
</div>
我的路线就像这样
Blog::Application.routes.draw do
resources :articles do
resources :comments
end
resources :photos do
resources :comments
end
resources :events do
resources :comments
end
resources :comments
root to: 'articles#index'
end
我的佣金路线就像这样
article_comment GET /articles/:article_id/comments/:id(.:format) comments#show
PUT /articles/:article_id/comments/:id(.:format) comments#update
DELETE /articles/:article_id/comments/:id(.:format) comments#destroy
articles GET /articles(.:format) articles#index
POST /articles(.:format) articles#create
new_article GET /articles/new(.:format) articles#new
edit_article GET /articles/:id/edit(.:format) articles#edit
article GET /articles/:id(.:format) articles#show
PUT /articles/:id(.:format) articles#update
DELETE /articles/:id(.:format) articles#destroy
photo_comments GET /photos/:photo_id/comments(.:format) comments#index
POST /photos/:photo_id/comments(.:format) comments#create
new_photo_comment GET /photos/:photo_id/comments/new(.:format) comments#new
edit_photo_comment GET /photos/:photo_id/comments/:id/edit(.:format) comments#edit
photo_comment GET /photos/:photo_id/comments/:id(.:format) comments#show
PUT /photos/:photo_id/comments/:id(.:format) comments#update
DELETE /photos/:photo_id/comments/:id(.:format) comments#destroy
photos GET /photos(.:format) photos#index
POST /photos(.:format) photos#create
new_photo GET /photos/new(.:format) photos#new
edit_photo GET /photos/:id/edit(.:format) photos#edit
photo GET /photos/:id(.:format) photos#show
PUT /photos/:id(.:format) photos#update
DELETE /photos/:id(.:format) photos#destroy
event_comments GET /events/:event_id/comments(.:format) comments#index
POST /events/:event_id/comments(.:format) comments#create
new_event_comment GET /events/:event_id/comments/new(.:format) comments#new
edit_event_comment GET /events/:event_id/comments/:id/edit(.:format) comments#edit
event_comment GET /events/:event_id/comments/:id(.:format) comments#show
PUT /events/:event_id/comments/:id(.:format) comments#update
DELETE /events/:event_id/comments/:id(.:format) comments#destroy
events GET /events(.:format) events#index
POST /events(.:format) events#create
new_event GET /events/new(.:format) events#new
edit_event GET /events/:id/edit(.:format) events#edit
event GET /events/:id(.:format) events#show
PUT /events/:id(.:format) events#update
DELETE /events/:id(.:format) events#destroy
comments GET /comments(.:format) comments#index
POST /comments(.:format) comments#create
new_comment GET /comments/new(.:format) comments#new
edit_comment GET /comments/:id/edit(.:format) comments#edit
comment GET /comments/:id(.:format) comments#show
PUT /comments/:id(.:format) comments#update
DELETE /comments/:id(.:format) comments#destroy
root / articles#index
答案 0 :(得分：1)
def edit
@comment = @commentable.comments.find(params[:id])
end
def create
@comment = @commentable.comments.find(params[:id])
if @comment.update_attributes(params[:comment])
redirect_to @commentable, notice: "Comment updated."
else
render :edit
end
end
您的修改应如下所示：
<%= link_to 'Edit', [:edit, @comment.commentable, @comment] %>
但是......您需要进行某种身份验证和/或授权。
答案 1 :(得分：0)
我现在没有太多时间来看这个，但是为了回应你的推文，我发布了我在我的测试应用中使用的代码，我开始工作。我在这里使用HAML。
在我的视图中调用编辑或删除链接时，我使用了这个部分：
- @category.photos.each do |photo|
= image_tag photo.image_url(:thumb)
%figcaption
= link_to "Change", [:edit, @category, photo]
= link_to "Delete", [@category, photo], :method => :delete
= link_to "New photo", [:new, @category, :photo]
我的照片控制器：
class PhotosController < ApplicationController
def create
@category = Category.find(params[:category_id])
@photo = @category.photos.create!(params[:photo])
redirect_to @category, :notice => "Photo created."
end
def edit
@category = Category.find(params[:category_id])
@photos = @category.photos
@photo = @photos.find(params[:id])
end
def update
@category = Category.find(params[:category_id])
@photo = @category.photos.find(params[:id])
respond_to do |format|
if @photo.update_attributes(params[:photo])
format.html { redirect_to @category, notice: "<i class=icon-ok /> #{@category.name} was successfully updated."}
format.js
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: @category.errors, status: :unprocessable_entity }
end
end
end
def new
@category = Category.find(params[:category_id])
@photo = @category.photos.new
end
def destroy
@category = Category.find(params[:category_id])
@photos = @category.photos
@photo = @photos.find(params[:id])
@photo.destroy
redirect_to @category, :notice => "Photo deleted."
end
end
在我的照片模型中，我有：
class Photo
include Mongoid::Document
embedded_in :category, :inverse_of => :photos
field :image
attr_accessible :image
# Set uploader
mount_uploader :image, ImageUploader
end
在类别模型中：
class Category
# Includes to set up the model
include Mongoid::Document
include Mongoid::Timestamps
include Mongoid::Ancestry
include Mongoid::Versioning
include Mongoid::Paranoia
include Mongoid::Slug
include Mongoid::History::Trackable
# tell it that it can go nest itself
has_ancestry
embeds_many :photos
# Accept nested attributes
accepts_nested_attributes_for :photos, :autosave => true
# tell history how it can track things
track_history :on => [:name, :description], # track these fields
#:modifier_field => :modifier, # adds "referenced_in :modifier" to track who made the change, default is :modifier
:version_field => :version, # adds "field :version, :type => Integer" to track current version, default is :version
:track_create => false, # track document creation, default is false
:track_update => true, # track document updates, default is true
:track_destroy => false # track document destruction, default is false
# Keep at most 5 versions of a record
max_versions 5
# Add the models fields here
field :name, type: String
field :ancestry, type: String
field :description, type: String
# Set which field the url slug should use
slug :name
# Make sure these attributes can be accessed
attr_accessible :ancestry, :name, :parent_id, :description
# Make name fields capitalized on save
def name=(t)
write_attribute(:name, t.to_s.split(' ').map {|w| w.capitalize}.join(' '))
end
# Create some scopes
scope :except, lambda{ |category| where("id <> ?", category.id)}
end
我只是粘贴了一堆我的代码，因为我没有太多时间来解析它以明确回答。 希望我编写一些代码的方式可以帮到你。
请记住我正在使用：
干杯，
布兰登
答案 2 :(得分：0)
这是多态关联的破坏动作，我相信你可以找出编辑：）
查看
<%= link_to content_tag(:i, "", class: "icon-trash icons"), [@commentable, comment], method: :delete,
data: { confirm: "Are you sure?" },
title: "Delete" %>
<强> CONTROLLER
def destroy
@comment = Comment.find(params[:id])
@commentable = @comment.commentable
if @comment.destroy
flash[:success] = "Comment Destroyed!"
redirect_to :back
end
end