gmaps4rails-将标记放到新位置

gmaps4rails - drop marker to new position

本文关键字:位置 新位置 gmaps4rails-      更新时间:2023-09-26

我有一个应用程序,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,旧的标记仍然存在,所以有两个标记。第一个是旧的,第二个是新的,可拖动。我用javascript更新表单id,但新位置没有保存。当我在javascript中检查数组的长度时,那个里什么都并没有。但若我看到页面的来源,数组中几乎并没有标记。我是不是错过了什么?

谢谢

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 %>

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。