[英]Parsing JSON error (from PhoneGap to Ruby)
I'm attempting to send a JSON string from PhoneGap to my Ruby application. 我正在尝试从PhoneGap向我的Ruby应用程序发送JSON字符串。 In PhoneGap, the following code is sending the JSON string:
在PhoneGap中,以下代码正在发送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'
});
In my Ruby app, I have a controller trying to process the response: 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
I know I'm getting the data from PhoneGap, because the parameters show up in the server log. 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。 I tried converting the response to a string, and then to json, because it doesn't appear to be in the proper json format.
我尝试将响应转换为字符串,然后转换为json,因为它似乎没有采用正确的json格式。 I've also tried passing the JSON.parse function response.body and params[:data].
我也尝试过传递JSON.parse函数response.body和params [:data]。 Here is the error I receive in the server log:
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)
Thanks in advance. 提前致谢。 Let me know if you need more information.
如果您需要更多信息,请与我们联系。 Cheers!
干杯!
data
in $.ajax
is not the name of the POST parameter. $.ajax
data
不是POST参数的名称。 You need to give data: { data: location }
in order to have a parameter named data
(which would translate to POST data={"lat"=>"37.785834", "lng"=>"-122.406417"}
) 您需要提供
data: { data: location }
才能有一个名为data
的参数(它将转换为POST data={"lat"=>"37.785834", "lng"=>"-122.406417"}
)
However, I would suggest you name it something like location
instead :P 但是,我建议您将其命名为
location
而不是:P
$.ajax({
type: "post",
dataType: 'json',
data: { location: location },
url: 'http://localhost:3000/location/new'
});
and 和
location_json = params[:location]
just so you understand what you wrote six months from now :D 只是为了让您了解从现在开始六个月后写的内容:D
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