Ruby on Rails 中的 Geokit，acts_as_mappable 的问题

Question

我查看了相关问题列表，但我的问题似乎没有列出，因此这里是：

基本上我正在尝试在 Ruby on Rails 环境中使用 Geokit，我不确定我是否正确安装了它，我已将它包含在 environment.rb 中（并完成了 rake db:install），我现在正在尝试执行以下操作：

require 'active_record'
require 'geokit'

class Store < ActiveRecord::Base
    acts_as_mappable
end

不幸的是，当我尝试运行它并查看它是否正常时，我收到以下错误：

c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/base.rb:1959:in `method_missing': undefined local variable or method `acts_as_mappable' for #<Class:0x4cd261c> (NameError)
    from C:/Users/Erika/Documents/Visual Studio 2008/Projects/StoreLocator/StoreLocator/app/models/store.rb:5

我正在为 Visual Studio 2008 运行 Ruby in Steel，我不确定我做错了什么，因为我发现的所有在线教程都比较陈旧并且适用于我。任何帮助将不胜感激。谢谢！

编辑：（根据本的要求添加） 以下是我的 environment.rb 的样子

# Be sure to restart your server when you modify this file

# Specifies gem version of Rails to use when vendor/rails is not present
RAILS_GEM_VERSION = '2.3.4' unless defined? RAILS_GEM_VERSION

# Bootstrap the Rails environment, frameworks, and default configuration
require File.join(File.dirname(__FILE__), 'boot')

Rails::Initializer.run do |config|
  # Settings in config/environments/* take precedence over those specified here.
  # Application configuration should go into files in config/initializers
  # -- all .rb files in that directory are automatically loaded.

  # Add additional load paths for your own custom dirs
  # config.load_paths += %W( #{RAILS_ROOT}/extras )

  # Specify gems that this application depends on and have them installed with rake gems:install
  # config.gem "bj"
  # config.gem "hpricot", :version => '0.6', :source => "http://code.whytheluckystiff.net"
  # config.gem "sqlite3-ruby", :lib => "sqlite3"
  # config.gem "aws-s3", :lib => "aws/s3"
  config.gem "geokit"
  config.gem "ym4r"

  # Only load the plugins named here, in the order given (default is alphabetical).
  # :all can be used as a placeholder for all plugins not explicitly named
  # config.plugins = [ :exception_notification, :ssl_requirement, :all ]

  # Skip frameworks you're not going to use. To use Rails without a database,
  # you must remove the Active Record framework.
  # config.frameworks -= [ :active_record, :active_resource, :action_mailer ]

  # Activate observers that should always be running
  # config.active_record.observers = :cacher, :garbage_collector, :forum_observer

  # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
  # Run "rake -D time" for a list of tasks for finding time zone names.
  config.time_zone = 'UTC'

  # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
  # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}')]
  # config.i18n.default_locale = :de
end

# These defaults are used in GeoKit::Mappable.distance_to and in acts_as_mappable
GeoKit::default_units = :kms
GeoKit::default_formula = :sphere

# This is the timeout value in seconds to be used for calls to the geocoder web
# services.  For no timeout at all, comment out the setting.  The timeout unit
# is in seconds. 
#GeoKit::Geocoders::timeout = 3

# These settings are used if web service calls must be routed through a proxy.
# These setting can be nil if not needed, otherwise, addr and port must be 
# filled in at a minimum.  If the proxy requires authentication, the username
# and password can be provided as well.
GeoKit::Geocoders::proxy_addr = nil
GeoKit::Geocoders::proxy_port = nil
GeoKit::Geocoders::proxy_user = nil
GeoKit::Geocoders::proxy_pass = nil

# This is your yahoo application key for the Yahoo Geocoder.
GeoKit::Geocoders::yahoo = 'REPLACE_WITH_YOUR_YAHOO_KEY'

# This is your Google Maps geocoder key. 
GeoKit::Geocoders::google = 'apikey'

# This is your username and password for geocoder.us.
# To use the free service, the value can be set to nil or false.  For 
# usage tied to an account, the value should be set to username:password.
GeoKit::Geocoders::geocoder_us = false 

# This is your authorization key for geocoder.ca.
# To use the free service, the value can be set to nil or false.  For 
# usage tied to an account, set the value to the key obtained from
# Geocoder.ca.

GeoKit::Geocoders::geocoder_ca = false

# This is the order in which the geocoders are called in a failover scenario
# If you only want to use a single geocoder, put a single symbol in the array.
# Valid symbols are :google, :yahoo, :us, and :ca.
# Be aware that there are Terms of Use restrictions on how you can use the 
# various geocoders.  Make sure you read up on relevant Terms of Use for each
# geocoder you are going to use.
GeoKit::Geocoders::provider_order = [:google]

Answer 1

acts_as_mappable 是 geokit-rails 的一部分。您需要安装 geokit-rails 插件。

script/plugin install git://github.com/andre/geokit-rails.git

要检查插件是否正确安装，请查看 Rails 应用程序的 vendor/plugins 目录。它应该有一个 geokit-rails 子目录。它，你会找到所有的插件文件，其他子目录，包括文件acts_as_mappable.rb（在vendor\plugins\geokit-rails\lib\geokit-rails）。

如果一切似乎都已正确安装，请尝试将"require geokit" 添加到插件根文件夹 (vendor\plugins\geokit-rails) 中的 init.rb 文件的顶部。

请务必在进行修改后重新启动您的应用服务器。

Answer 2

您使用什么方法来包含 geokit 库？插件？宝石？宝石是否已解压缩到供应商中？你的 environment.rb 是什么样的？

编辑：我打算将此作为对问题的评论 - 请原谅我。