在一个模型中对多个地址进行地理编码

问题描述

我正尝试使用地理编码器对模型中的2个地址进行地理编码，并且无法让宝石按我的意愿工作。这是我应用于我的模型的代码：

I am trying to geocode 2 addresses in a model using geocoder and I can't get gem to work as I want to. Here is the code that I am applying to my model:

class Sender < ActiveRecord::Base
validates_presence_of :source_address
validates_presence_of :destination_address
geocoded_by :source_address, :latitude => :latitude1, :longitude => :longitude1
geocoded_by :destination_address, :latitude2 => :latitude2, :longitude2 => :longitude2

def update_coordinates
    geocode
    [latitude1, longitude1, latitude2, longitude2]
end

after_validation :geocode

以下是views / senders / show.html.erb的代码：

Here is code for views/senders/show.html.erb:

 <%= @sender.latitude1 %>
   <%= @sender.longitude1 %>
   <%= @sender.latitude2 %>
   <%= @sender.longitude2 %>

结果：35.6894875 139.6917064 - 是不是应该寄回我2份地址资讯？

Result : 35.6894875 139.6917064 - Isn't it supposed to send me back 2 address information?

以下是我的js：

Here is my js:

<script type="text/javascript">
function initialize() {
  var source = new google.maps.LatLng(<%= @sender.latitude1 %>, <%= @sender.longitude1 %>);
  var dest = new google.maps.LatLng(<%= @sender.latitude2 %>, <%= @sender.longitude2 %>);
  var mapOptions = {
    center: source,
    zoom: 8

  }
  var mapOptions2 = {
    center: dest,
    zoom: 8

  }

  var map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
  var map2 = new google.maps.Map(document.getElementById('map_canvas2'), mapOptions2);

  var marker = new google.maps.Marker({
    position:source,
    map: map
  });
  var marker2 = new google.maps.Marker({
    position:dest,
    map: map2
  });
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>

推荐答案

提到的问题和解决方案。

The problem and solution are mentioned here.

添加以下 before_save 以及相应的方法来解决问题。不要忘记为第二个地点（也许是目的地）重复部分代码：

Add the following before_save and corresponding method to your model to solve the problem. Don't forget to repeat the part of code for the second location (maybe destination):

before_save :geocode_endpoints

  private
  #To enable Geocoder to works with multiple locations
  def geocode_endpoints
    if from_changed?
      geocoded = Geocoder.search(loc1).first
      if geocoded
        self.latitude = geocoded.latitude
        self.longitude = geocoded.longitude
      end
    end
    # Repeat for destination
        if to_changed?
      geocoded = Geocoder.search(loc2).first
      if geocoded
        self.latitude2 = geocoded.latitude
        self.longitude2 = geocoded.longitude
      end
    end
  end

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