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ruby-on-rails - 如何编辑多态注释?

转载 作者:太空宇宙 更新时间:2023-11-03 16:23:04 25 4
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由于评论发布在多个位置:习惯、目标等。我使用什么路径来编辑 comments/_comments 中的评论?

我试过:

<%= link_to edit_comment_path(comment) do %> #Or should we use conditionals to target: edit_habit_comment_path, edit_goal_comment_path, etc?
<%= comment.content %>
<% end %>

但是在点击它时我们得到这个错误:

ActiveRecord::RecordNotFound (Couldn't find Comment with 'id'=2 [WHERE "comments"."commentable_id" = ? AND "comments"."commentable_type" = ?])

我试过要在 def edit 中放些什么:

评论 Controller

class CommentsController < ApplicationController
before_action :load_commentable
before_action :set_comment, only: [:show, :edit, :update, :destroy, :like]
before_action :logged_in_user, only: [:create, :destroy]

def index
@comments = @commentable.comments
end

def new
@comment = @commentable.comments.new
end

def create
@comment = @commentable.comments.new(comment_params)
if @comment.save
redirect_to @commentable, notice: "comment created."
else
render :new
end
end

def edit
@habit = Habit.find(params[:id])
@goal = Goal.find(params[:id])
@commentable = @habit
@comments = @commentable.comments
@comment = current_user.comments.find(params[:id])
end

def update
@comment = current_user.comments.find(params[:id])
if @comment.update_attributes(comment_params)
redirect_to @commentable, notice: "Comment was updated."
else
render :edit
end
end

def destroy
@comment = current_user.comments.find(params[:id])
@comment.destroy
redirect_to @commentable, notice: "comment destroyed."
end

def like
@comment = Comment.find(params[:id])
@comment_like = current_user.comment_likes.build(comment: @comment)
if @comment_like.save
@comment.increment!(:likes)
flash[:success] = 'Thanks for liking!'
else
flash[:error] = 'Two many likes'
end
redirect_to(:back)
end

private

def set_comment
@comment = Comment.find(params[:id])
end

def load_commentable
resource, id = request.path.split('/')[1, 2]
@commentable = resource.singularize.classify.constantize.find(id)
end

def comment_params
params[:comment][:user_id] = current_user.id
params.require(:comment).permit(:content, :commentable, :user_id, :like)
end
end

我密切关注本教程:http://railscasts.com/episodes/154-polymorphic-association-revised

如果您需要进一步的解释或代码来帮助我,请告诉我:)

更新

我为路线尝试了很多替代方案:

Rails.application.routes.draw do

get 'notes/index'

get 'notes/new'

get 'notifications/index'

get 'auth/:provider/callback', to: 'sessions#facebook'
get 'auth/failure', to: redirect('/')
get 'signout', to: 'sessions#destroy', as: 'signout'

get 'password_resets/new'

get 'password_resets/edit'

resources :users do
resources :comments
end

shallow do
resources :habits do
resources :comments
end
resources :goals do
resources :comments
end
end


resources :notes

resources :habits do
resources :notes
resources :notifications
resources :comments do
resources :likes
end
resources :likes
member do
post :like
post :notifications
end
resources :levels do
# we'll use this route to increment and decrement the missed days
resources :days_missed, only: [:create, :destroy]
end
end

resources :goals do
resources :notes
resources :comments
member do
post :like
end
end

resources :valuations do
resources :notes
resources :comments
resources :notifications
member do
post :like
post :notifications
end
end

resources :quantifieds do
resources :notes
resources :comments
member do
post :like
end
end

resources :results

resources :users

resources :account_activations, only: [:edit]

resources :activities do
resources :valuations
resources :comments
resources :notifications
member do
post :like
post :notifications
end
end

resources :comments do
resources :comments
member do
post :like
end
end

resources :password_resets, only: [:new, :create, :edit, :update]

resources :relationships, only: [:create, :destroy]

get 'tags/:tag', to: 'pages#home', as: :tag

resources :users do
member do
get :following, :followers
end
end

get 'about' => 'pages#about'
get 'signup' => 'users#new'
get 'login' => 'sessions#new'
post 'login' => 'sessions#create'
delete 'logout' => 'sessions#destroy'

root 'pages#home'
end

最佳答案

您可能会发现 shallow nested routes有用。基本上,你写

shallow do
resources :goals do
resources :comments
end

# ...
end

相当于

resources :goals do
resources :comments, only: [:index, :new, :create]
end
resources :comments, only: [:show, :edit, :update, :destroy]

# ...

这意味着,只有那些绝对需要嵌套的 Action 才会真正被嵌套。如果您只想显示、编辑、更新或销毁评论,它将像任何其他非嵌套资源一样工作,您将能够简单地使用 edit_comment_path

您需要相应地更改您的 Controller ,因为 commentable_id(即 goal_id)将不再是 url 的一部分。您仍然可以通过 @comment.commentable(用于重定向)访问可评论的内容。我遇到的在评论 Controller 中设置可评论的最干净的解决方案是在 params 中查找 :commentable_id 的名称,而不是摆弄请求小路。这将导致像这样的 Controller :

class CommentsController < ApplicationController
before_action :set_commentable, only: [:index, :new, :create]
before_action :set_comment, only: [:edit, :update, :destroy, :like]

def index
@comments = @commentable.comments
end

def new
@comment = @commentable.comments.new
end

def create
@comment = @commentable.comments.new(comment_params)
if @comment.save
redirect_to @commentable, notice: "Comment created."
else
render :new
end
end

def edit
end

def update
if @comment.update_attributes(comment_params)
redirect_to @comment.commentable, notice: "Comment was updated."
else
render :edit
end
end

def destroy
@comment.destroy
redirect_to @comment.commentable, notice: "Comment destroyed."
end

def like
@comment_like = current_user.comment_likes.build(comment: @comment)
if @comment_like.save
@comment.increment!(:likes)
flash[:success] = 'Thanks for liking!'
else
flash[:error] = 'Too many likes'
end
redirect_to(:back)
end

private

def set_commentable
@commentable = find_commentable
end

# add more commentable models here
def find_commentable
if params[:goal_id]
Goal.find(params[:goal_id])
elsif params[:habit_id]
Habit.find(params[:habit_id])
else
fail 'Unsupported commentable'
end
end

def set_comment
@comment = current_user.comments.find(params[:id])
end

def comment_params
params[:comment][:user_id] = current_user.id
params.require(:comment).permit(:content, :commentable, :user_id, :like)
end
end

关于ruby-on-rails - 如何编辑多态注释?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30604089/

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