使用Ember前端呈现JSON帖子时出现问题，Sinatra使用Grape后端处理

目前，我在ember中呈现JSON帖子时遇到了一些问题，我的应用程序的结构在前面有我的config.ru文件，另一个包含所有ember内容的公共文件夹。该应用程序工作，它只是不会渲染帖子，它与sinatra+ember一起工作，但自从我抓拍葡萄后，我一直有麻烦。任何帮助都将不胜感激

Config.ru：

require 'sinatra'
require 'JSON'
require 'grape'
require 'sinatra/base'

$posts = {}
$posts[123] = {:title => "Rails is Omakase",
:id => 123,
:_id => 987,
:author => "d2h",
:publishedAt => Date.new(),
:intro => "There are lots of  la carte software environments in this world. Places         where in order to eat, you must first carefully look over the menu of options to order   exactly what you want.",
:extended => "I want this for my ORM, I want that for my template language, and let's   finish it off with this routing library. Of course, you're going to have to know what you   want, and you'll rarely have your horizon expanded if you always order the same thing, but   there it is. It's a very popular way of consuming software.\n\nRails is not that. Rails is     omakase."
  }

put '*/:id' do
 p "entering PUT /*/:id", params
 raw = request.env["rack.input"].read  ## this is the JSON data as a string
 p "raw:", raw
 $posts[params[:id].to_i] = JSON.parse(raw)['post'].merge({:id => params[:id].to_i})
 p "\n\n+++++  $posts:", $posts
 {:id => params[:i]}.to_json
end


class API < Grape::API
 default_format :json
 get '/posts' do
  mount API::posts => '/posts'
  data = {:posts => $posts.values}.to_json 
  return data 
end
end

 class Web < Sinatra::Base
  get '/posts' do
  p "entering GET"
  data = {:posts => $posts.values}.to_json
  p "\n*** data:", data
 data
end

get '/' do
 File.read(File.join('public', 'index.html'))
end
end

use Rack::Session::Cookie
run Rack::Cascade.new [API, Web]

---

Github repo:

遇到问题

错误消息？没有错误消息，工作正常，但不会向应用程序呈现JSON帖子。因此，本质上，余烬应用程序可以在不渲染帖子的情况下工作

  App = Ember.Application.create({});

  App.Store = DS.Store.extend({
   revision: 12,
   adapter: DS.RESTAdapter.extend({
   url: 'http://localhost:4567'
  })
 });

App.Router.map(function() {
  this.resource('about');
  this.resource('posts', function() {
  this.resource('post', { path: ':post_id' });
 });
});

 App.PostsRoute = Ember.Route.extend({
  model: function() {
  return App.Post.find();
 }
  });

App.PostController = Ember.ObjectController.extend({
 isEditing: false,

edit: function() {
 this.set('isEditing', true);
},

doneEditing: function() {
  this.set('isEditing', false);
  this.get('store').commit();
 }
});

var attr = DS.attr;

App.Post = DS.Model.extend({
title: attr('string'),
author: attr('string'),
intro: attr('string'),
extended: attr('string'),
publishedAt: attr('date')
});

var showdown = new Showdown.converter();

Ember.Handlebars.registerBoundHelper('markdown', function(input) {
 return new Handlebars.SafeString(showdown.makeHtml(input));
});

Ember.Handlebars.registerBoundHelper('date', function(date) {
 return moment(date).fromNow();
});