Gmaps4Rails附加标记，以现有的地图

Question

我想asynchonios加载地图，我已经呈现的映像：

handler = Gmaps.build('Google'); 
      handler.buildMap({ provider: { 
       mapTypeId: google.maps.MapTypeId.ROADMAP, 
       styles: mapStyle_dark }, 
       internal: { 
        id: 'map'}}, function() { 
       var json_array = $.getJSON("locations/async.json", function (data) { 
        return data; 
       }); 
       var markers = handler.addMarkers(json_array); 
       handler.fitMapToBounds(); 
       handler.getMap().setZoom(2); 
      }); 

我的Ajax响应看起来是这样的：

[{"lat":48.21042800000001,"lng":16.3822238,"infowindow":{"id":"53a0a0012d289ec127000020","image":"veq3r13nbgn5qg9c7zqk","name":"Blended Shisha Lounge Bar","categories":[{"name":"Bars","slug":"bars","icon":"bars"}],"coordinates":[16.3822238,48.21042800000001]},"picture":{"anchor":[17,17],"url":"/assets/map/icons/categories/bars-38.png","width":38,"height":38}}] 

但指标得到不追加。

我做错了什么？

Answer 1

取代：

var json_array = $.getJSON("locations/async.json", function (data) { 
    return data; 
}); 
var markers = handler.addMarkers(json_array); 

有：

$.getJSON("locations/async.json", function (json_array) { 
    var markers = handler.addMarkers(json_array); 
});