为什么我的json属性在Sinatra的帖子中反弹？

我希望有人能和我分享他们的知识。我有一个小的Sinatra应用程序，我想将json数据发布到它。谢天谢地，该记录正在创建中，但没有一个属性能够创建它。我已经阅读了几个使用curl的JSON示例，但它们都产生了相同的结果。所以我觉得这是我的模特。我可以用tux fine创建记录，所以它可能不是我的模型

 curl command:

 curl -XPOST -H "Content-Type: application/json" 
 "localhost:4567/date" -d 
 '{ "post": { "title": "different tile here"}}'

 curl output:

 => {"id":13,"title":null,"body":null,"created_at":"2014-04-21T18:13:53Z",
"updated_at":"2014-04-21T18:13:53Z"}

西纳特拉输出：

     [2014-04-27T20:03:48.035710 #45360] DEBUG -- :    (0.1ms)  commit transaction
  127.0.0.1 - - [27/Apr/2014 20:03:48] "POST /date HTTP/1.1" 200 - 0.0181
  {"post":{"title":"different tile here"}}
  D, [2014-04-27T20:09:32.614274 #45360] DEBUG -- :    (0.1ms)  begin transaction
  D, [2014-04-27T20:09:32.615917 #45360] DEBUG -- :   SQL (0.4ms)  INSERT INTO "posts"         ("created_at", "updated_at") VALUES (?, ?)  [["created_at", 2014-04-28 01:09:32 UTC],    ["updated_at", 2014-04-28 01:09:32 UTC]]
 D, [2014-04-27T20:09:32.617656 #45360] DEBUG -- :    (1.5ms)  commit transaction
 D, [2014-04-27T20:09:32.617852 #45360] DEBUG -- :    (0.1ms)  begin transaction
 D, [2014-04-27T20:09:32.618132 #45360] DEBUG -- :    (0.0ms)  commit transaction
 127.0.0.1 - - [27/Apr/2014 20:09:32] "POST /date HTTP/1.1" 200 - 0.0070
 D, [2014-04-27T20:09:57.796909 #45360] DEBUG -- :   Post Load (0.3ms)  SELECT     "posts".* FROM "posts" ORDER BY created_at DESC
 127.0.0.1 - - [27/Apr/2014 20:09:57] "GET / HTTP/1.1" 200 2149 0.0128

app.rb

 require 'sinatra'
 require 'sinatra/activerecord'
 require './environments'
 require 'sinatra/flash'
 require 'sinatra/redirect_with_flash'
 require 'json'

 class Post < ActiveRecord::Base
 end

 post "/posts" do
   @post = Post.new(params[:post])
   if @post.save
     redirect "posts/#{@post.id}"
   else
     erb :"posts/create"
   end
 end

 post '/date', :provides => 'json' do
   data = JSON.parse(request.body.read)
   json_data = data.to_json

   content_type :json
   #@post = Post.new(params)

   @post = Post.create(
     title: data[:title]
     body: data[:body]
     )

   if @post.save
     @post.to_json
   else
     halt 500
   end
 end

 get "/posts/create" do
   @title = "Create post"
   @post = Post.new
   erb :"posts/create"
 end

 get "/posts/:id" do
@post = Post.find(params[:id])
@title = @post.title
erb :"posts/view"
 end

 get "/" do
@posts = Post.order("created_at DESC")
@title = "Welcome."
erb :"posts/index"
 end

环境.rb

 configure :development do
set :database, 'sqlite3:///dev.db'
set :show_exceptions, true
 end

 configure :production do
db = URI.parse(ENV['DATABASE_URL'] || 'postgres:///localhost/mydb')

ActiveRecord::Base.establish_connection(
    adapter: db.scheme == 'postgres' ? 'postgresql' : db.scheme,
    host: db.host,
    username: db.user,
    password: db.password,
    database: db.path[1..-1],
    encoding: 'utf9'
    )
 end

---

自从我通过这个基本的API测试这篇文章以来，我就不再使用布局文件了。我在网上浏览了Sinatra API的几个例子，不知道我没有看到什么。我在这里俯瞰什么？这几乎就像Rails 4中的强参数，但如果是这样，为什么tux允许我创建记录？thanx，sam

除了使用制表符而不是空格缩进代码之外，这看起来基本上没问题；）您尝试过在路由上使用吗？看起来您几乎解决了问题–为什么要注释掉行

#data=JSON.parse（request.body.read）

？这是上一个教程中的产物。我尝试过您的建议，感谢您提供这些建议。

 configure :development do
set :database, 'sqlite3:///dev.db'
set :show_exceptions, true
 end

 configure :production do
db = URI.parse(ENV['DATABASE_URL'] || 'postgres:///localhost/mydb')

ActiveRecord::Base.establish_connection(
    adapter: db.scheme == 'postgres' ? 'postgresql' : db.scheme,
    host: db.host,
    username: db.user,
    password: db.password,
    database: db.path[1..-1],
    encoding: 'utf9'
    )
 end