我有一个部分解决方案，我以前的问题，这是正确显示帖子#index和帖子#show路由，但在创建一个帖子后窒息:
ActionController::UrlGenerationError in PostsController#create
没有路由匹配{:action=>"show"，:controller=>"posts"}缺少必需的关键字:[:id，:month，:year]提取的源代码(第#32行左右):
30 31日,,,,,,如果@post.save
32 format.html {redirect_to post_path, notice: 'Post创建成功。'}
33岁,,,,,,,,的格式。Json {render:show, status::created, location: @post}
34岁,,,,,,其他
35
和编辑文章:
没有路由匹配[PATCH] "/blog/example-post/blog/2015/09/example-post"
下面是所有有问题的文件(在同一个非常简单的支架博客上工作):
$ rails new blog
[...]
$ cd blog
# (Add friendly_id to Gemfile & install)
$ rails generate friendly_id
$ rails generate scaffold post title content slug:string:uniq
[...]
$ rake db:migrate
routes.rb
Rails.application.routes.draw do
scope 'blog' do
get '', to: 'posts#index', as: 'posts'
post '', to: 'posts#create'
get '/new', to: 'posts#new', as: 'new_post'
get '/:id/edit', to: 'posts#edit', as: 'edit_post'
get '/:year/:month/:id', to: 'posts#show', as: 'post'
patch '/:id', to: 'posts#update'
put '/:id', to: 'posts#update'
delete '/:year/:month/:id', to: 'posts#destroy'
end
end
post.rb
class Post < ActiveRecord::Base
extend FriendlyId
friendly_id :title, use: :slugged
def year
created_at.localtime.strftime("%Y")
end
def month
created_at.localtime.strftime("%m")
end
end
posts_controller.rb
class PostsController < ApplicationController
before_action :set_post, only: [:show, :edit, :update, :destroy]
def index
@posts = Post.all
end
def show
@post = Post.friendly.find(params[:id])
end
def new
@post = Post.new
end
def edit
@post = Post.friendly.find(params[:id])
end
def create
@post = Post.new(post_params)
respond_to do |format|
if @post.save
format.html { redirect_to post_path, notice: 'Post was successfully created.' }
format.json { render :show, status: :created, location: @post }
else
format.html { render :new }
format.json { render json: @post.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @post.update(post_params)
format.html { redirect_to post_path, notice: 'Post was successfully updated.' }
format.json { render :show, status: :ok, location: @post }
else
format.html { render :edit }
format.json { render json: @post.errors, status: :unprocessable_entity }
end
end
end
def destroy
@post.destroy
respond_to do |format|
format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_post
@post = Post.friendly.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def post_params
params.require(:post).permit(:title, :content, :slug)
end
end
end
posts_helper.rb
module PostsHelper
def post_path(post)
"blog/#{post.year}/#{post.month}/#{post.slug}"
end
end
app/views/文章/index.html.erb
<p id="notice"><%= notice %></p>
<h1>Listing Posts</h1>
<table>
<thead>
<tr>
<th>Title</th>
<th>Content</th>
<th>Slug</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% @posts.each do |post| %>
<tr>
<td><%= post.title %></td>
<td><%= post.content %></td>
<td><%= post.slug %></td>
<td><%= link_to 'Show', post_path(post) %></td>
<td><%= link_to 'Edit', edit_post_path(post) %></td>
<td><%= link_to 'Destroy', post, method: :delete, data: { confirm: 'Are you sure?' } %></td>
</tr>
<% end %>
</tbody>
</table>
<br>
<%= link_to 'New Post', new_post_path %>
总的来说，下面是工作原理:
- /博客/指数
- /博客/2015/09/example-post
- 创建一个新的帖子(直到它应该重定向到posts#show点，当你得到上面提到的UrlGenerationError)
- 也就是说，新帖子被添加到数据库中，所以如果你回到/index，新帖子将是可见的
- 销毁post
…什么不工作:
- 编辑一篇文章(带有表单的编辑页面将呈现，但在提交您的更改后，您将得到上述错误-并且更改从未使其进入DB)
- 创建新帖子后完成重定向(前面提到)。
- /博客/2015/指数
- /博客/2015/09/指数
我很高兴我已经走了这么远-任何指导解决这些悬而未决的问题将是非常感激的!
编辑
感谢@brad-werth，帖子创建已通过以下更改修复:
posts_controller.rb
def create
@post = Post.new(post_params)
respond_to do |format|
if @post.save
format.html { redirect_to post_path(@post.year, @post.month, @post), notice: 'Post was successfully created.' }
我也试过用以下方式解决后编辑问题:
将编辑路由更改为get '/:year/:month/:id/edit', to: 'posts#edit', as: 'edit_post'，并添加以下覆盖到posts_helper。Rb:
def edit_post_path(post)
"#{post.year}/#{post.month}/#{post.slug}/edit"
end
现在，索引页的"编辑"链接将转到正确的URL (/blog/2015/09/example-post/edit -它曾经转到/blog/example-post/edit)，并成功渲染编辑页面。但是这会导致补丁中断(实际上，更新没有到达DB):
No route matches [PATCH] "/blog/2015/09/example-post/blog/2015/09/example-post"
我认识到这个复制问题可能与edit_post_path覆盖有关，但是以下尝试强制使用正确的PATCH路由没有效果:
- 更新PATCH路由到
patch '/:year/:month/:id', to: 'posts#update' 将更新后的PATCH路由命名为
as: 'patch'，并将PATCH路径覆盖添加到posts_helper:def patch_path(post) "#{post.year}/#{post.month}/#{post.slug}" end将覆盖更改为:
def patch_path(post) "" end- Un-name,将PATCH路由更改为
patch '', to: 'posts#update'
看着posts_controller，它看起来不像问题在那里，因为它不是重定向不是问题-我不明白为什么@post.update(post_params)会有问题:
def update
respond_to do |format|
if @post.update(post_params)
format.html { redirect_to @post, notice: 'Post was successfully updated.' }
format.json { render :show, status: :ok, location: @post }
else
format.html { render :edit }
format.json { render json: @post.errors, status: :unprocessable_entity }
end
end
end
因此，据我所知，URL中的复制是在PATCH操作之前发生的，这将我们带回到EDIT流—它必须将复制传递给PATCH，从而导致阻塞。想法吗?
您的错误状态:
No route matches {:action=>"show", :controller=>"posts"} missing required keys: [:id, :month, :year]
从失败的format.html { redirect_to post_path, notice: 'Post was successfully created.' }行可以看到，您正在调用没有参数的post_path。
您的路由get '/:year/:month/:id', to: 'posts#show', as: 'post'需要一个年、月和id。这与上面的错误信息一致。
format.html { redirect_to post_path(@post.year, @post.month, @post), notice: 'Post was successfully created.' }
在更新和创建操作更改:
format.html { redirect_to post_path, notice: 'Post was successfully ...' }
format.html { redirect_to @post, notice: 'Post was successfully ...' }