Ember：无法尝试使用this.set设置一个带有在if语句中声明的变量的字段(Ember: Having trouble trying to use this.set to set a field with a variable declared inside an if statement)

对于大多数人来说这可能很容易，但我真的无法弄清楚我的代码可能出现什么问题，我觉得我尽可能地尝试了一切。 基本上我想要做的是对字符串地址进行地理编码，并将结果存储在我的数据库中。 我设法让地理编码部分工作，因为它发回纬度和经度。 现在，我想将结果存储回我的数据库中。 通常我使用this.set（'myfield'，myvar）但myvar设置在“if”中，看起来它阻止我这样做。 我能做什么 ？ 这是我的控制器“actions”部分中的代码： 

 geocode(location, mylat, mylng) {
  const google = window.google;
  var geocoder = new google.maps.Geocoder();
  var latlng = "";
  var lat = "";
  var lng = "";

 geocoder.geocode( { 'address': location }, function(results, status) {

  if (status == google.maps.GeocoderStatus.OK && results.length > 0) {
        latlng = results[0].geometry.location;
           lat = latlng.lat();
          lng = latlng.lng();

           alert(lat); // it works
            alert(lng); // it works too
            this.set(`model.lat`, latlng); //not working here
}
}
);
alert(latlng); // not working
      this.set(`model.lat`, latlng); //not working too

}, 
  
 

 

 我花了大概8个小时试图解决这个问题而且我完全迷失了，所以任何帮助都会非常感激。 提前谢谢了， 
this is probably very easy for most you, but I really can't figure out what could be wrong with my code and I feel like I tried everything possible. Basically what I want to do, is to geocode a string adress, and store the result in my database. I managed to get the geocode part to work, as it sends back the latitude and longitude. Now, I would like to store the result back in my database. Usually I use this.set('myfield', myvar) but myvar is set inside an "if" and it looks like it prevent me to do that. What can I do ? Here is my code inside the "actions" section of my controller:
 

 
 
  
  
 geocode(location, mylat, mylng) {
  const google = window.google;
  var geocoder = new google.maps.Geocoder();
  var latlng = "";
  var lat = "";
  var lng = "";

 geocoder.geocode( { 'address': location }, function(results, status) {

  if (status == google.maps.GeocoderStatus.OK && results.length > 0) {
        latlng = results[0].geometry.location;
           lat = latlng.lat();
          lng = latlng.lng();

           alert(lat); // it works
            alert(lng); // it works too
            this.set(`model.lat`, latlng); //not working here
}
}
);
alert(latlng); // not working
      this.set(`model.lat`, latlng); //not working too

}, 
  
 

 

I spent maybe 8 hours trying to solve this and I'm totally lost, so any help would be sincerely greatly appreciated. Many thanks in advance,

                
最满意答案

                
                    
                        
 在geocode方法的回调中，没有定义它。 
 

 这里是geocoder.geocode( { 'address': location }, function(results, status) 
 

 您可以像这样保持this的参考： 
 
actions: {
geocode(location, mylat, mylng){
  const google = window.google;
  var geocoder = new google.maps.Geocoder();
  var latlng = "";
  var lat = "";
  var lng = "";
  const self = this;

  geocoder.geocode({'address': location}, function(results, status) {

      if (status == google.maps.GeocoderStatus.OK && results.length > 0) {
        latlng = results[0].geometry.location;
        lat = latlng.lat();
        lng = latlng.lng();

        alert(lat); // it works
        alert(lng); // it works too
        self.set(`model.lat`, latlng); //not working here
      }
    });
  alert(latlng); // not working
  this.set(`model.lat`, latlng); //not working too
}

In the callback of geocode method, the this is not defined.
 

Here geocoder.geocode( { 'address': location }, function(results, status)
 

You can keep a ref to this like this :
 
actions: {
geocode(location, mylat, mylng){
  const google = window.google;
  var geocoder = new google.maps.Geocoder();
  var latlng = "";
  var lat = "";
  var lng = "";
  const self = this;

  geocoder.geocode({'address': location}, function(results, status) {

      if (status == google.maps.GeocoderStatus.OK && results.length > 0) {
        latlng = results[0].geometry.location;
        lat = latlng.lat();
        lng = latlng.lng();

        alert(lat); // it works
        alert(lng); // it works too
        self.set(`model.lat`, latlng); //not working here
      }
    });
  alert(latlng); // not working
  this.set(`model.lat`, latlng); //not working too
}

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