javascript - Rails 5，Gmaps4Rails-设置

Question

多年来，我一直在尝试找出如何将gmaps4rails集成到Rails应用程序中。

我做了一个全新的应用程序，并尝试了新鲜。

我不知道怎么了。我正在寻找完整且最新的安装说明。许多SO帖子都提到了旧版本的依赖关系，最终导致该问题在更高版本中得以解决。

目前，我认为:

<script src="//maps.google.com/maps/api/js?v=3.23&key=<%= ENV['GOOGLE_MAPS_API_KEY'] %>"></script>
<script src="//google-maps-utility-library-v3.googlecode.com/svn/tags/markerclustererplus/2.0.14/src/markerclusterer_packed.js" type="text/javascript"></script>

<div style='width: 800px;'>
  <div id="map" style='width: 800px; height: 400px;'></div>
</div>

<script type="text/javascript">
  handler = Gmaps.build('Google');
  handler.buildMap({ provider: {}, internal: {id: 'map'}}, function(){
    markers = handler.addMarkers(<%=raw @hash.to_json %>);
    handler.bounds.extendWith(markers);
    handler.fitMapToBounds();
  });
</script>

在我的application.js中，我有:

//= require jquery
//= require jquery_ujs
//= require turbolinks
//= require bootstrap-sprockets
//= require moment
//= require bootstrap-datetimepicker
//= require pickers
//= require underscore
//= require gmaps/google
//= require markerclusterer
//= require_tree .

我已经将underscore.js的生产版本保存在我的vendor / assets / javascripts文件夹中。我还将markerclusterer.js保存为同一文件夹中的文件。

在我的gem文件中，我有:

gem 'geocoder'
gem 'gmaps4rails', '~> 2.1', '>= 2.1.2'
gem 'countries'
gem 'country_select'

在我的 Controller 中，我有:

class AddressesController < ApplicationController

    def index
    end

    def show
        @hash = Gmaps4rails.build_markers(@address) do |address, marker|
          marker.lat address.latitude
          marker.lng address.longitude
       end
    end

    def new
        @address = Address.new
    end 

    def create
    @address = Address.new(address_params)
    # authorize @address

    respond_to do |format|
      if @address.save
        format.html { redirect_to @address, notice: 'Address was successfully created.' }
        format.json { render :show, status: :created, location: @address }
      else
        format.html { render :new }
        format.json { render json: @address.errors, status: :unprocessable_entity }
      end
    end
  end


  private
    # Use callbacks to share common setup or constraints between actions.
    def set_address
      @address = Address.find(params[:id])
      # authorize @address
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def address_params
      params[:address].permit(:unit, :building, :street_number, :street, :city, :region, :zip, :country, :time_zone, :latitude, :longitude)
    end


    def user_time_zone(&block)
      Time.use_zone(current_user.time_zone, &block)
    end
end

当我尝试使用 map 渲染 View 时，Chrome检查器将错误显示为:

v3.googlecode.com/svn/tags/markerclustererplus/2.0.14/src/markerclusterer_packed.js无法加载资源:服务器响应状态为404(未找到)
chrome-extension://mkjojgglmmcghgaiknnpgjgldgaocjfd/content/contentScripts/kwift.CHROME.min.js:1271未捕获的语法错误:标识符'findGoodContent'已被声明
util.js:221 Google Maps API警告:NoApiKeys https://developers.google.com/maps/documentation/javascript/error-messages#no-api-keys
util.js:221 Google Maps API警告:RetiredVersion https://developers.google.com/maps/documentation/javascript/error-messages#retired-version
util.js:221 Google Maps API警告:InvalidKey https://developers.google.com/maps/documentation/javascript/error-messages#invalid-key

我不了解任何这些错误，也找不到如何设置此gem在rails中使用的说明。我可以看到它已经下载了很多-人们一定已经知道如何设置它。我发疯了，试图解决这个问题。

再生API密钥后

我尝试在Google控制台上重新生成浏览器API密钥。

现在，当我尝试呈现页面时，出现以下控制台错误:

primitives.self-5b8a3a6….js?body=1:5 Uncaught ReferenceError: google is not defined(…)Gmaps.Google.Primitives @ primitives.self-5b8a3a6….js?body=1:5Gmaps.Objects.Handler.Handler.setPrimitives @ handler.self-2f220ca….js?body=1:122Handler @ handler.self-2f220ca….js?body=1:8build @ base.self-8dd1d1a….js?body=1:9(anonymous function) @ VM2063:2t.SnapshotRenderer.n.assignNewBody @ turbolinks.self-c5acd7a….js?body=1:6t.SnapshotRenderer.n.replaceBody @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6t.Renderer.t.renderView @ turbolinks.self-c5acd7a….js?body=1:6t.SnapshotRenderer.n.render @ turbolinks.self-c5acd7a….js?body=1:6t.Renderer.t.render @ turbolinks.self-c5acd7a….js?body=1:6t.View.e.renderSnapshot @ turbolinks.self-c5acd7a….js?body=1:6t.View.e.render @ turbolinks.self-c5acd7a….js?body=1:6t.Controller.r.render @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6
turbolinks.self-c5acd7a….js?body=1:6 GET http://google-maps-utility-library-v3.googlecode.com/svn/tags/markerclustererplus/2.0.14/src/markerclusterer_packed.js t.SnapshotRenderer.n.assignNewBody @ turbolinks.self-c5acd7a….js?body=1:6t.SnapshotRenderer.n.replaceBody @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6t.Renderer.t.renderView @ turbolinks.self-c5acd7a….js?body=1:6t.SnapshotRenderer.n.render @ turbolinks.self-c5acd7a….js?body=1:6t.Renderer.t.render @ turbolinks.self-c5acd7a….js?body=1:6t.View.e.renderSnapshot @ turbolinks.self-c5acd7a….js?body=1:6t.View.e.render @ turbolinks.self-c5acd7a….js?body=1:6t.Controller.r.render @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6
turbolinks.self-c5acd7a….js?body=1:6 GET http://localhost:3000/users/assets/images/grayscale.svg t.SnapshotRenderer.n.assignNewBody @ turbolinks.self-c5acd7a….js?body=1:6t.SnapshotRenderer.n.replaceBody @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6t.Renderer.t.renderView @ turbolinks.self-c5acd7a….js?body=1:6t.SnapshotRenderer.n.render @ turbolinks.self-c5acd7a….js?body=1:6t.Renderer.t.render @ turbolinks.self-c5acd7a….js?body=1:6t.View.e.renderSnapshot @ turbolinks.self-c5acd7a….js?body=1:6t.View.e.render @ turbolinks.self-c5acd7a….js?body=1:6t.Controller.r.render @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6(anonymous function) @ turbolinks.self-c5acd7a….js?body=1:6
util.js:221 Google Maps API warning: NoApiKeys https://developers.google.com/maps/documentation/javascript/error-messages#no-api-keysuD.S @ util.js:221(anonymous function) @ js?v=3.23&key=:127(anonymous function) @ js?v=3.23&key=:47(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:47(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97jc @ js?v=3.23&key=:46gc.Qc @ js?v=3.23&key=:97(anonymous function) @ common.js:1
util.js:221 Google Maps API warning: RetiredVersion https://developers.google.com/maps/documentation/javascript/error-messages#retired-versionuD.S @ util.js:221(anonymous function) @ js?v=3.23&key=:127(anonymous function) @ js?v=3.23&key=:47(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:47(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97jc @ js?v=3.23&key=:46gc.Qc @ js?v=3.23&key=:97(anonymous function) @ common.js:1
util.js:221 Google Maps API warning: InvalidKey https://developers.google.com/maps/documentation/javascript/error-messages#invalid-keyuD.S @ util.js:221(anonymous function) @ js?v=3.23&key=:127(anonymous function) @ js?v=3.23&key=:47(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:47(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97(anonymous function) @ js?v=3.23&key=:44(anonymous function) @ js?v=3.23&key=:97jc @ js?v=3.23&key=:46gc.Qc @ js?v=3.23&key=:97(anonymous function) @ common.js:1

当我在终端中查看rails时，我还可以看到:

ActionController::RoutingError (No route matches [GET] "/assets/underscore-min.map"):

Parameters: {"id"=>"4"}
ActionController::RoutingError (No route matches [GET] "/users/assets/images/grayscale.svg"):

关于下划线路由错误，终端中的行指的是 Assets /下划线。我的文件结构是vendor / assets / javascripts，然后将文件另存为underscore.js(不是min.map)。

另一个尝试

我尝试用v3.24替换js v3.23，并且摆脱了以上警告消息。但是，我仍然无法获得用于渲染地址的 map 。当我检查chrome控制台检查器时，可以看到该地址已在javascript中得到确认，但纬度和经度详细信息却没有:

  handler = Gmaps.build('Google');
  handler.buildMap({ provider: {}, internal: {id: 'map'}}, function(){
    markers = handler.addMarkers([{"lat":null,"lng":null,"infowindow":"Unit 1\u003cbr\u003e34 Darling Street\u003cbr\u003eBuilding D\u003cbr\u003eBalmain East   NSW   2041\u003cbr\u003eAustralia"}]);
    handler.bounds.extendWith(markers);
    handler.fitMapToBounds();
  });

我现在想知道这个问题是否与模型关联有关。

我有一个地址模型和一个组织模型。关联是:

地址:

belongs_to :addressable, :polymorphic => true, optional: true

组织:

has_many :addresses, as: :addressable
    accepts_nested_attributes_for :addresses,  reject_if: :all_blank, allow_destroy: true

在我的地址 Controller show action中，我有:

def show
        @hash = Gmaps4rails.build_markers(@address) do |address, marker|
          marker.lat user.latitude
          marker.lng user.longitude
          # marker.title user.title
      end
    end

在我的组织 Controller 显示操作中，我有:

    def show
    @addresses = @organisation.addresses

    @hash = Gmaps4rails.build_markers(@addresses) do |address, marker|
        marker.lat address.latitude
        marker.lng address.longitude
        marker.infowindow address.full_address
    end    
  end

带有 map 的局部 View 在views / addresses / map.html.erb中

当我尝试通过这些更改再次呈现页面时，出现很多错误，这些错误都说:

js?v=3.24&key=AIzaSyAleQgfNH3HRQVUCYnyAzp46xmXW7WrWrc:37 Uncaught RangeError: Maximum call stack size exceeded

我读过其他SO帖子，那里的人们都犯了这个错误，并且这些笔记继续讨论“递归循环”。我似乎没有任何与这些错误中显示的代码相似的代码，因此我不确定如何解决这些消息。

我想知道是否需要更改组织 Controller 操作以某种方式引用组织地址而不是一般地引用地址(尽管是这种情况，但我不理解控制台检查器如何显示从js中识别出的正确地址。 map 局部)。

任何人都可以提供详细的分步教程来帮助我解决这个问题吗？

有类似问题的其他人

从其他SO帖子中可以看出，其他人也有类似的问题。建议似乎是这样的答案:
Gmaps4rails Maximum call stack size exceeded?

我想我已经做到了-我在地址 Controller 和组织 Controller 中的show Action 都引用了lat / lng而不是完整的词(在db中使用)。

ERIC的建议

根据Eric的建议，我从gem文件中删除了gmaps4rails gem，并从application.js中删除了require / gmaps行

我将组织 Controller 的显示操作更改为:

def show
    @addresses = @organisation.addresses.all

    # @hash = Gmaps4rails.build_markers(@addresses) do |address, marker|
    #     marker.lat address.latitude
    #     marker.lng address.longitude
    #     marker.infowindow address.full_address
    # end

  end

此步骤与Eric对于其标记 Controller 的索引操作的建议相同。我分别有一个地址 Controller ，该 Controller 具有类似于Eric的索引 Action 。在我的数据库中，地址是多态的，属于组织。我正在尝试在组织的显示页面上呈现 map ，因此我认为此步骤与Eric的建议一致。

接下来，我使用以下命令更新了我的地址/_map.html.erb:

<h3>My Google Maps Demo</h3>
<div id="map"></div>

<%= javascript_tag do %>
  var addresses = <%= raw @addresses.to_json %>;
<% end %>

<script async defer
src="https://maps.googleapis.com/maps/api/js?key=<%= ENV['GOOGLE_MAPS_API_KEY'] %>&callback=initMap">
</script>

我在app / javascripts文件夹中为addresses.js创建了一个新文件，其内容如下:

   function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 4
  });
  var bounds = new google.maps.LatLngBounds();

  var n = addresses.length;
  for (var i = 0; i < n; i++) {
    var address = new google.maps.Address({
      position: {lat: parseFloat(addresses[i].latitude), lng: parseFloat(addresses[i].longitude)},
      title: addresses[i].name,
      map: map
    });
    bounds.extend(address.position);
  }

  map.fitBounds(bounds);
}

当我保存所有这些并尝试时，屏幕上会出现一个空的灰色框。

使用镀 Chrome 检查器时，我可以看到:

//<![CDATA[

  var addresses = [{"id":5,"unit":"1","building":"d","street_number":"34","street":"darling street","city":"Balmain East","region":"NSW","zip":"2041","country":"AU","time_zone":"International Date Line West","addressable_id":1,"addressable_type":"Organisation","description":"main_address","created_at":"2016-10-27T19:17:27.919Z","updated_at":"2016-11-08T22:48:16.978Z","latitude":"-33.85751","longitude":"151.193546"}];

//]]>

以上是数据库中的地址。但这不是在绘制 map 。

谁能看到我需要做些什么才能使 map 与地址一起呈现？

我何时查看CHROME CONSOLE INSPECTOR

我可以在控制台检查器中看到几个新错误。

他们是:

addresses.self-176b72f….js?body=1:9 Uncaught TypeError: google.maps.Address is not a constructor

这个帖子有类似的问题。可接受的解决方案是添加回调。我不知道该怎么做或在哪里做。

Google Maps API v3 - TypeError: Result of expression 'google.maps.LatLng' [undefined] is not a constructor

Answer 1

这是我可以在Google Maps上运行的最小的Rails应用程序。

Ruby 2.3.1，Rails 5.0.0.1，不需要额外的gem。

rails new gmaps

取消评论

gem 'therubyracer', platforms: :ruby

在Gemfile中

bundle install

rails generate resource marker name:string latitude:decimal longitude:decimal

rake db:migrate

app / controllers / markers_controller.rb:

class MarkersController < ApplicationController
  def index
    @markers = Marker.all
  end
end

app / views / markers / index.html.erb:

<h3>My Google Maps Demo</h3>
<div id="map"></div>

<%= javascript_tag do %>
  var markers = <%= raw @markers.to_json %>;
<% end %>

<script async defer
src="https://maps.googleapis.com/maps/api/js?key=<%= ENV['GOOGLE_MAPS_API_KEY'] %>&callback=initMap">
</script>

应用/ Assets /样式表/markers.scss:

#map {
  height: 400px;
  width: 100%;
}

app / assets / javascripts / markers.js:

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 4
  });
  var bounds = new google.maps.LatLngBounds();

  var n = markers.length;
  for (var i = 0; i < n; i++) {
    var marker = new google.maps.Marker({
      position: {lat: parseFloat(markers[i].latitude), lng: parseFloat(markers[i].longitude)},
      title: markers[i].name,
      map: map
    });
    bounds.extend(marker.position);
  }

  map.fitBounds(bounds);
}

在 rails c中添加一些标记:

Marker.create(:name => 'Sydney', :latitude => -33.87, :longitude => 151.17)
Marker.create(:name => 'Uluru', :latitude => -25.363, :longitude => 131.044)

在bash中将您的API KEY添加到环境中:

export GOOGLE_MAPS_API_KEY="AIza.............................."

rails s

做完了!

我使用了这个 answer和这个 Gmaps documentation。

您可能应该检查是否没有恶意代码传输到javascript，例如通过Marker＃name。