gmaps4rails - 将标记放到新位置 [英] gmaps4rails - drop marker to new position

问题描述

我有应用程序，可以从带有 GPS 数据的照片中提取 GPS 信息.当我想通过编辑操作更新位置时，我想拖动一个标记，替换它并保存新位置.当我点击地图时，旧标记仍然存在，所以有两个标记.第一个是旧的，第二个是新的，可拖动.我在 javascript 中更新了表单 ID，但未保存新位置.当我在 javascript 中检查数组的长度时，那里什么也没有.但是如果我看到页面的来源，数组中的标记很少.我错过了什么吗?

谢谢

properites_controller.rb

def 编辑@property = Property.find(params[:id])@json = Property.find(params[:id]).to_gmaps4rails结尾定义更新@property = Property.find(params[:id])如果@property.update_attributes(params[:property])redirect_to @property，注意:'属性已成功更新.'别的渲染动作:编辑"结尾结尾

edit.html.erb

<%= render 'form' %><div id="map_canvas"><%= gmaps("map_options" => { "zoom" => 15, "auto_adjust" => true, "auto_zoom" => false},标记" =>{数据"=>@json}) %>

<% content_for :scripts do %><script type="text/javascript" charset="utf-8">var 标记数组 = [];//单击时，清除标记，放置一个新标记，更新表单中的坐标Gmaps.map.callback = function() {google.maps.event.addListener(Gmaps.map.serviceObject, 'click', function(event) {clearOverlays();placeMarker(event.latLng);updateFormLocation(event.latLng);});};//用给定的坐标更新表单属性函数 updateFormLocation(latLng) {$('#property_latitude').val(latLng.lat());$('#property_longitude').val(latLng.lng());$('#property_gmaps_zoom').val(Gmaps.map.serviceObject.getZoom());}//添加一个带有打开信息窗口的标记函数 placeMarker(latLng) {var 标记 = 新的 google.maps.Marker({位置:纬度，地图:Gmaps.map.serviceObject，可拖动:真});markerArray.push(marker);//设置并打开信息窗口var infowindow = new google.maps.InfoWindow({content: '<div class="popup"><h2>Awesome!</h2><p>拖动我并调整缩放级别.</p>'});infowindow.open(Gmaps.map.serviceObject,marker);//听拖拽降低google.maps.event.addListener(marker, 'dragend', function() {updateFormLocation(this.getPosition());});}//从地图中移除叠加层函数 clearOverlays() {如果(标记数组){for (var i = 0; i

_form.html.erb

<%= simple_form_for @property, :html =>{:multipart =>真} 做 |f|％＞<%= f.error_notification %><div class="form-inputs"><%= f.input :name, :label =>"Název", :input_html =>{ :class =>输入-xlarge"} %><%= f.input :description, :label =>"Popis", :input_html =>{ :class =>"input-xlarge", :rows =>"6"}%><br/><%= f.hidden_​​field :纬度%><%= f.hidden_​​field :longitude %><%= f.input :date, :label =>"基准", :as =>:日期%><%= f.file_field :photo %>

<div class="form-actions"><%= link_to 'Zpět', properties_path, :class =>'btn'%><%= f.button :submit, :class =>'btn-主要'%>

<%结束%>

解决方案

您使用的 markersArray 不是由 gem 的 javascript 维护的.

您应该简单地使用 Gmaps.map.markers，它包含所有标记信息.

I have application where gps info are extracted from photo with gps data. When I want to update position by edit action, I would like to drag a marker, replace it and save new position. When I click to map, old marker is still there, so there are two markers. First is old and second is new one, dragable. I update form ids in javascript but new position is not saved. When I check length of array in javascript, then there is nothing there. But if I see source of page, there are few markers in array. Am I missing something?

Thank you

properites_controller.rb

def edit
  @property = Property.find(params[:id])
  @json = Property.find(params[:id]).to_gmaps4rails
end

def update
  @property = Property.find(params[:id])
  if @property.update_attributes(params[:property])
    redirect_to @property, notice: 'Property was successfully updated.' 
  else
    render action: "edit"
  end
end

edit.html.erb

<%= render 'form' %>

<div id="map_canvas">
 <%= gmaps("map_options" => { "zoom" => 15, "auto_adjust" => true, "auto_zoom" => false},
      "markers" => {"data" => @json}) %>
</div>

<% content_for :scripts do %>
<script type="text/javascript" charset="utf-8">

    var markersArray = [];

    // On click, clear markers, place a new one, update coordinates in the form
    Gmaps.map.callback = function() {
        google.maps.event.addListener(Gmaps.map.serviceObject, 'click', function(event) {
          clearOverlays();
          placeMarker(event.latLng);
          updateFormLocation(event.latLng);
        });
    };
    // Update form attributes with given coordinates
    function updateFormLocation(latLng) {
        $('#property_latitude').val(latLng.lat());
        $('#property_longitude').val(latLng.lng());
        $('#property_gmaps_zoom').val(Gmaps.map.serviceObject.getZoom());
    }
    // Add a marker with an open infowindow
    function placeMarker(latLng) {
        var marker = new google.maps.Marker({
            position: latLng, 
            map: Gmaps.map.serviceObject,
            draggable: true
        });
        markersArray.push(marker);
        // Set and open infowindow
        var infowindow = new google.maps.InfoWindow({
            content: '<div class="popup"><h2>Awesome!</h2><p>Drag me and adjust the zoom level.</p>'
        });
        infowindow.open(Gmaps.map.serviceObject,marker);
        // Listen to drag & drop
        google.maps.event.addListener(marker, 'dragend', function() {
            updateFormLocation(this.getPosition());
        });
    }
    // Removes the overlays from the map
    function clearOverlays() {
      if (markersArray) {
        for (var i = 0; i < markersArray.length; i++ ) {
          markersArray[i].serviceObject.setMap(null);
          //markersArray[i].setMap(null);
        }
      }
      markersArray.length = 0;
    }
</script><% end %>

_form.html.erb

<%= simple_form_for @property,  :html => {:multipart => true}  do |f| %>

<%= f.error_notification %>

<div class="form-inputs">
  <%= f.input :name, :label => "Název", :input_html => { :class => "input-xlarge"} %>
  <%= f.input :description, :label => "Popis", :input_html => { :class => "input-xlarge", :rows => "6"} %><br />
  <%= f.hidden_field :latitude %>
  <%= f.hidden_field :longitude %>
  <%= f.input :date, :label => "Datum", :as => :date %>
  <%= f.file_field :photo %>
</div>

<div class="form-actions">
  <%= link_to 'Zpět', properties_path, :class => 'btn' %>
  <%= f.button :submit, :class => 'btn-primary' %>
</div>
<% end %>

解决方案

You're using a markersArray not maintained by the gem's javascript.

You should simply use Gmaps.map.markers, it contains all markers information.

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