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我正在尝试将一个 JSON 字符串从 PhoneGap 发送到我的 Ruby 应用程序。在 PhoneGap 中,以下代码发送 JSON 字符串:

            var location = {
                lat: position.coords.latitude,
                lng: position.coords.longitude
            }

            $.ajax({
              type: "post",
              dataType: 'json',
              data: location,
              url: 'http://localhost:3000/location/new'
            });

在我的 Ruby 应用程序中,我有一个控制器试图处理响应:

def addlocation

    require 'json'
    json_string = params[:data]

    parsed_json = JSON.parse(json_string.to_json)

    if parsed_json["app"] == "Inrix PhoneGap"
        new_obj = Location.new
        new_obj.lat = parsed_json["lat"].to_f
        new_obj.lng = parsed_json["lng"].to_f
        new_obj.save
    end

end

我知道我正在从 PhoneGap 获取数据,因为参数显示在服务器日志中。我尝试将响应转换为字符串,然后转换为 json,因为它似乎不是正确的 json 格式。我也尝试过传递 JSON.parse 函数 response.body 和 params[:data]。这是我在服务器日志中收到的错误:

Started POST "/location/new" for 127.0.0.1 at 2013-07-23 01:14:37 -0700
Processing by LocationsController#addlocation as HTML
  Parameters: {"lat"=>"37.785834", "lng"=>"-122.406417"}
Completed 500 Internal Server Error in 0ms

JSON::ParserError (757: unexpected token at 'null'):
  app/controllers/locations_controller.rb:12:in `addlocation'


  Rendered /usr/local/rvm/gems/ruby-1.9.3-p392/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.1ms)
  Rendered /usr/local/rvm/gems/ruby-1.9.3-p392/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.9ms)
  Rendered /usr/local/rvm/gems/ruby-1.9.3-p392/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (7.5ms)

提前致谢。如果您需要更多信息,请与我们联系。干杯!

4

1 回答 1

1

datain$.ajax不是 POST 参数的名称。您需要给出data: { data: location }一个名为的参数data(将转换为 POST data={"lat"=>"37.785834", "lng"=>"-122.406417"}

但是,我建议您将其命名为location:P

$.ajax({
  type: "post",
  dataType: 'json',
  data: { location: location },
  url: 'http://localhost:3000/location/new'
});

location_json = params[:location]

只是为了让您了解六个月后您写的内容:D

于 2013-07-23T08:26:28.867 回答