根据我得到的指导先前的问题在解决我的实现 /YYYY/MM/Slug URL 结构的原始问题，我希望得到一些帮助来解决我在尝试编辑帖子时收到的错误：
没有路由匹配 [PATCH]“/blog/2015/09/example-post/blog/2015/09/example-post”
以下是所有有问题的文件（使用相同的非常简单的脚手架博客）：
$ 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
路线.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 '/:year/:month/: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(@post.year, @post.month, @post), 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
def edit_post_path(post)
"#{post.year}/#{post.month}/#{post.slug}/edit"
end
end
应用程序/视图/帖子/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 %>
总而言之，以下是有效的：
- /博客/索引
- /博客/2015/09/示例帖子
- 创建新帖子
- 销毁帖子
…什么不起作用：
- 编辑帖子（带有表单的编辑页面将呈现，但提交更改后，您将收到上述错误 - 并且更改永远不会到达数据库）
我认识到这个重复问题可能与此 edit_post_path 覆盖有关，但以下尝试强制正确的 PATCH 路由没有效果：
- 将 PATCH 路由更新为
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
- 取消命名并将 PATCH 路由更改为
patch '', to: 'posts#update'
看看 posts_controller，看起来问题不存在，因为它不是重定向不是问题 - 我不明白为什么@post.update(post_params)会有问题的：
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
据我所知，URL 中的重复是在 PATCH 操作之前发生的，这使我们回到了编辑流程 - 它必须将重复传递到 PATCH，在那里它最终会被阻塞。有想法吗？提前致谢！
EDIT
编辑.html.erb
<h1>Editing Post</h1>
<%= render 'form' %>
<%= link_to 'Show', @post %> |
<%= link_to 'Back', posts_path %>
_form.html.erb
<%= form_for(@post) do |f| %>
<% if @post.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@post.errors.count, "error") %> prohibited this post from being saved:</h2>
<ul>
<% @post.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br>
<%= f.text_field :title %>
</div>
<div class="field">
<%= f.label :content %><br>
<%= f.text_field :content %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
