如何做一个Ajax GET请求从rails获取数据并将其传递给javascript（谷歌地图）？

I have a model Locations with two columns latitude and longitude. I want to find a way where I can get the list of locations and pass them to google maps using Ajax and javascript. So far my code is as follows:

我有一个模型位置,有两列纬度和经度。我想找到一种方法,我可以获取位置列表,并使用Ajax和javascript将它们传递给谷歌地图。到目前为止,我的代码如下:

map.js:

function initialize() 
{   
    var map;
    var latlng = new google.maps.LatLng(37.09, -95.71);
    var options = {
    zoom: 5, 
    center: latlng, 
    mapTypeId: google.maps.MapTypeId.ROADMAP,
    disableDefaultUI: true,
    disableDoubleClickZoom: true,
    noClear: true,
    navigationControl: true,
    navigationControlOptions: {
        position: google.maps.ControlPosition.TOP_RIGHT
    }
    };
   map = new google.maps.Map(document.getElementById('map'), options);

   var marker = new google.maps.Marker({
    position: latlng, 
    map: map, 
    title: 'Click me', 
    });
}

locations_controller.rb

def show
    @location = Location.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @location }
    end
  end

Page displaying the map:

显示地图的页面:

<div id="map" onload="initialize();">
</div>

SO now I want to find a way to make an AJAX request from map.js so I can get the locations from the Location model and pass it to the marker object so that when a map is loading all the locations pre-existing in the database are passed to marker and those markers appear.

所以现在我想找到一种从map.js发出AJAX请求的方法,这样我就可以从Location模型中获取位置并将其传递给marker对象,这样当map加载数据库中预先存在的所有位置时被传递给标记并出现那些标记。

Thank you.

1 个解决方案

#1

Oh I was able to find my way to get the list of locations. The controller and view are left untouched.

哦,我找到了获取位置列表的方法。控制器和视图保持不变。

I added the following ajax in map.js which did the work for me.

我在map.js中添加了以下ajax,它为我做了工作。

$.ajax({
        type: "GET",
        dataType: "json",
        url: "/locations",
        success: function(data){}
    });

Now data can be passed to the marker object in google maps.

现在,数据可以传递到谷歌地图中的标记对象。

#1