Rails后端未正确接收具有JSON有效负载的Crossrider Ajax发布请求

Question

我有一个要发布到远程服务器（Rails）的JSON对象。 将POST参数转换为url编码的字符串后，所有尝试以“ application / json”形式将其发送到服务器都会失败。 例如：

appAPI.request.post({
  url: "http://mybackend",
  postData: {hello: 'world', foo: 'bar'},
  onSuccess: function(response) {
    console.log("postback succeeded with response: " + response)
  },
  onFailure: function(httpCode) {
    console.log("postback failure: " + httpCode)
  },
  contentType: 'application/json'
});

当服务器从格式错误的JSON对象抱怨时返回HTTP 500：

Error occurred while parsing request parameters.
Contents:

MultiJson::LoadError (784: unexpected token at 'hello=world&foo=bar'): 
  /Users/hammady/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/json/common.rb:148:in `parse'
  ...

我还应该怎么做才能将JSON对象发送到我的Rails后端？

Answer 1

您需要先对对象进行字符串化。

postData: JSON.stringify({hello: 'world', foo: 'bar'});

Answer 2

使用JSON.stringify对发布的数据进行字符串化

appAPI.request.post({
  url: "http://mybackend",
  postData: JSON.stringify({hello: 'world', foo: 'bar'}),
  onSuccess: function(response) {
    console.log("postback succeeded with response: " + response)
  },
  onFailure: function(httpCode) {
    console.log("postback failure: " + httpCode)
  },
  contentType: 'application/json'
});