多年来我一直在尝试找出如何将 gmaps4rails 合并到 Rails 应用程序中。
我制作了一个全新的应用程序并尝试了新的。
我不知道出了什么问题。我正在寻找完整且最新的设置说明。许多 SO 帖子都提到了旧版本的依赖项，最终表明该问题已在更高版本中得到解决。
目前，我的看法是：
<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 .
我已将 underscore.js 的生产版本保存在我的供应商/资产/javascripts 文件夹中。我还将markerclusterer.js 作为文件保存在同一文件夹中。
在我的 gem 文件中，我有：
gem 'geocoder'
gem 'gmaps4rails', '~> 2.1', '>= 2.1.2'
gem 'countries'
gem 'country_select'
在我的控制器中，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
当我尝试使用地图渲染视图时，chrome 检查器显示错误如下：
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”已声明
util.js:221 Google 地图 API 警告：NoApiKeyshttps://developers.google.com/maps/documentation/javascript/error-messages#no-api-keys https://developers.google.com/maps/documentation/javascript/error-messages#no-api-keysutil.js:221 Google 地图 API 警告：退休版本https://developers.google.com/maps/documentation/javascript/error-messages#retired-version https://developers.google.com/maps/documentation/javascript/error-messages#retired-versionutil.js:221 Google 地图 API 警告：InvalidKeyhttps://developers.google.com/maps/documentation/javascript/error-messages#invalid-key https://developers.google.com/maps/documentation/javascript/error-messages#invalid-key
我不明白这些错误，也找不到有关如何设置此 gem 以在 Rails 中使用它的说明。我可以看到它已经被下载了很多 - 人们一定已经知道如何设置它了。我让自己疯狂地试图解决这个问题。
重新生成 API 密钥后
我尝试在谷歌控制台上重新生成浏览器 API 密钥。
现在，当我尝试渲染页面时，我收到以下控制台错误：
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
当我在终端中查找 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，终端中的行指的是资产/下划线。我的文件结构是vendor/assets/javascripts，然后文件保存为underscore.js（而不是min.map）。
另一种尝试
我尝试将 js v3.23 替换为 v3.24，这样就消除了上述警告消息。但是，我仍然无法获取地图来呈现地址。当我检查 chrome 控制台检查器时，我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并未得到确认：
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可能与模型关联有关。
我有一个地址模型和一个组织模型。这些协会是：
Address:
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
在我的地址控制器显示操作中，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
在我的组织控制器显示操作中，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
带有地图的部分位于views/addresses/map.html.erb中
当我尝试通过这些更改再次呈现页面时，我收到很多错误，全部显示：
js?v=3.24&key=AIzaSyAleQgfNH3HRQVUCYnyAzp46xmXW7WrWrc:37 Uncaught RangeError: Maximum call stack size exceeded
我读过其他 SO 帖子，其中人们遇到了这个错误，并且注释继续讨论“递归循环”。我似乎没有任何与这些错误中显示的代码类似的代码，所以我不确定如何解决这些消息。
我想知道是否需要更改组织控制器操作以某种方式引用组织地址而不是一般地址（尽管如果是这种情况，那么我不明白控制台检查器如何显示在 js 中识别的正确地址）地图部分）。
任何人都可以帮助我提供详细的分步教程，我可以用它来尝试解决这个问题吗？
其他有类似问题的人
我从其他 SO 帖子中看到其他人也遇到过类似的问题。该建议似乎是这样的答案：Gmaps4rails 超出最大调用堆栈大小？ https://stackoverflow.com/questions/8301097/gmaps4rails-maximum-call-stack-size-exceeded/8423759
我想我已经这样做了 - 我在每个地址控制器和组织控制器中的显示操作都引用纬度/经度而不是完整的单词（在数据库中使用）。
埃里克的建议
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
我将组织控制器的显示操作更改为：
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 对标记控制器索引操作的建议相同。我单独有一个地址控制器，它有一个类似于埃里克的索引操作。在我的数据库中，地址是多态的并且属于组织。我正在尝试在组织显示页面上渲染地图，所以我认为这一步与Eric的建议一致。
接下来我用以下内容更新了地址/_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 地址.js 创建了一个新文件，其中包含：
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。
当我使用 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"}];
//]]>
上面是db中的地址。但它并不是在制作地图。
谁能看到我需要做什么才能使地图与地址一起渲染？
当我查看 Chrome 控制台检查器时
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
这篇文章也有类似的问题。公认的解决方案是添加回调。我不知道如何或在哪里做到这一点。
Google Maps API v3 - 类型错误：表达式“google.maps.LatLng”的结果[未定义]不是构造函数 https://stackoverflow.com/questions/6577404/google-maps-api-v3-typeerror-result-of-expression-google-maps-latlng-undef
