서버에 KnocloutJS viewmodel로 데이터 저장

Question

ViewModel을 SQL 서버에 저장하고 싶습니다. 표준 knockout ko.toJSON (viewModel)은 나에게 정의되지 않은 오류를주고있다. 그래서 약간의 파기 후에 나는이 Question을 찾았지만 여전히 나에게 정의되지 않은 것을 준다.

여기 내 viewmodel의 코드입니다.이 코드는 2 가지 통화 간의 전환율을 가져 오는 통화 변환 테이블입니다.

//ko Event Handler for datepicker.js 
    ko.bindingHandlers.datepicker = { 
     init: function (element, valueAccessor, allBindingsAccessor) { 
      //initialize datepicker with some optional options 
      var options = allBindingsAccessor().datepickerOptions || {}; 
      $(element).datepicker(options).on("changeDate", function (ev) { 
       var observable = valueAccessor(); 
       observable(ev.date); 
      }); 
     }, 
     update: function (element, valueAccessor) { 
      var value = ko.utils.unwrapObservable(valueAccessor()); 
      $(element).datepicker("setValue", value); 
     } 
    }; 


    //Currency Model Definition 
    var currency = function (data) { 
     var self = this; 
     self.DateCreated = ko.observable(formatJsonDate(data.DateCreated)); 
     self.CurrencyFrom = ko.observable(data.CurrencyFrom); 
     self.CurrencyTo = ko.observable(data.CurrencyTo); 
     self.ConversionRate = ko.observable(data.ConversionRate); 

     //Yhoo Finance API 
     ko.computed(function() { 
      var from = self.CurrencyFrom(), 
       to = self.CurrencyTo(); 


      if (!from || !to) { 
       self.ConversionRate("N/A"); 
       return; 
      } 

      getRate(from, to).done(function (YahooData) { 
       console.log("got yahoo data for [" + from + "," + to + "]: ", YahooData); 
       self.ConversionRate(YahooData.query.results.row.rate); 
      }); 
     }); 
    } 

    var NewDate = new Date().getFullYear() + '-' + ("0" + (new Date().getMonth() + 1)).slice(-2) + '-' + new Date().getDate(); 


    var CurrencyModel = function (Currencies) { 
     var self = this; 
     self.Currencies = ko.observableArray(Currencies); 

     self.AddCurrency = function() { 
      self.Currencies.push({ 
       DateCreated: NewDate, 
       CurrencyFrom: "", 
       CurrencyTo: "", 
       ConversionRate: "" 
      }); 
     }; 

     self.RemoveCurrency = function (Currency) { 
      self.Currencies.remove(Currency); 
     }; 

     self.Save = function() { 

      $.ajax({ 
       url: "#", 
       contentType: 'application/json', 
       data: ko.mapping.toJSON(CurrencyModel), 
       type: "POST", 
       dataType: 'json', 
       success: function (data) { 
        //I get undefined.... 
        alert(ko.mapping.toJSON(CurrencyModel)); 
       }, 
       error: function (data) { alert("error" + data); } 
      }); 
     } 

     $.ajax({ 
      url: "CurrencyConfiguration.aspx/GetConfiguredCurrencies", 
      data: '{}', 
      type: "POST", 
      contentType: "application/json; charset=utf-8", 
      dataType: "JSON", 
      timeout: 10000, 
      success: function (Result) { 
       //     callback(Result); 
       var MappedCurrencies = 
       $.map(Result.d, 
      function (item) { 
       getRate(item.CurrencyFrom, item.CurrencyTo); 
       return new currency(item); 
      } 
     ); 
       self.Currencies(MappedCurrencies); 

      }, 
      error: function (xhr, status) { 
       alert(status + " - " + xhr.responseText); 
      } 
     }); 

    }; 

    function formatJsonDate(jsonDate) { 
     var FormatDate = new Date(parseInt(jsonDate.substr(6))); 
     var Output = FormatDate.getFullYear() + '-' + ("0" + (FormatDate.getMonth() + 1)).slice(-2) + '-' + FormatDate.getDate(); 
     return (Output); 
    }; 

    function getRate(from, to) { 
     return $.getJSON("http://query.yahooapis.com/v1/public/yql?q=select%20rate%2Cname%20from%20csv%20where%20url%3D'http%3A%2F%2Fdownload.finance.yahoo.com%2Fd%2Fquotes%3Fs%3D" + from + to + "%253DX%26f%3Dl1n'%20and%20columns%3D'rate%2Cname'&format=json&callback=?"); 
    } 

     function callback(data) { 
     if (viewModel) { 
      // model was initialized, update it 
      ko.mapping.fromJS(data, viewModel); 
     } else { 
      // or initialize and bind 
      viewModel = ko.mapping.fromJS(data); 
      ko.applyBindings(viewModel); 
     } 
    } 

    $('#Date').datepicker(); 

    $(document).ready(function() { 
     var VM = new CurrencyModel(); 
     ko.applyBindings(VM); 
    }) 

Answer 1

data: ko.mapping.toJSON(CurrencyModel) 

당신과 JSON 제대로 웁니다 (NULL, 2, $ 루트) 정의되지

Answer 2

사용하려는 method 아닌가요 :

ko.toJSON 

보다는 매핑 객체 오프

?