命名空间包括不起作用

Question

我正在使用我的提供商iis_site中的Opscode IIS食谱

include ::Opscode::IIS::Helper

在我的库文件夹中，我有一个名为helper.rb的文件

#
# Cookbook Name:: iis
# Library:: helper
#
# Author:: Julian C. Dunn <jdunn@getchef.com>
#
# Copyright 2013, Chef Software, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

module Opscode
  module IIS
    module Helper
      if RUBY_PLATFORM =~ /mswin|mingw32|windows/
        require 'chef/win32/version'
      end

      require 'rexml/document'
      include REXML

      def self.older_than_windows2008r2?
        if RUBY_PLATFORM =~ /mswin|mingw32|windows/
          win_version = Chef::ReservedNames::Win32::Version.new
          win_version.windows_server_2008? ||
          win_version.windows_vista? ||
          win_version.windows_server_2003_r2? ||
          win_version.windows_home_server? ||
          win_version.windows_server_2003? ||
          win_version.windows_xp? ||
          win_version.windows_2000?
        end
      end

      def self.is_new_value?(document, xpath, value_to_check)
        return XPath.first(document, xpath).to_s == value_to_check ? false : true
      end

      def self.is_new_or_empty_value?(document, xpath, value_to_check)
        return is_new_value(document, xpath, value_to_check) || value_to_check == '' ? false : true
      end

      def self.appcmd(node)
        return "#{node['iis']['home']}/appcmd.exe"
      end
    end
  end
end

在iis_site.rb文件中，我收到以下错误：

  

致命错误：NoMethodError：iis_site [默认网站]（iis :: remove_default_site第21行）出现错误：NoMethodError：没有名为appcmd' for的资源或方法：Chef :: Provider :: IisSite＆＃34;＆＃ 34;＆＃39;

如果我从：

更改提供者行

cmd = "#{appcmd(node)} add site /name:\"#{@new_resource.site_name}\""

到

cmd = "#{Opscode::IIS::Helper.appcmd(node)} add site /name:\"#{@new_resource.site_name}\""

问题已经解决，但是这增加了很多不需要的重复。

Answer 1

完成以下原因的自我回答：

在方法定义中使用self意味着它只是一个实例方法。即：只能通过类的对象访问它。

在您的情况下，您必须有一个班级::Opscode::IIS::Helper的对象来呼叫appcmd

您使用方法的完整定义(This part:“＃{Opscode :: IIS :: Helper.appcmd（node）}`）动态创建临时对象以调用方法

除此之外，您将模块发送到提供程序命名空间，因此您无需在提供商的顶部要求库。

Answer 2

问题在于使用self.

以下是固定代码。

#
# Cookbook Name:: iis
# Library:: helper
#
# Author:: Julian C. Dunn <jdunn@getchef.com>
#
# Copyright 2013, Chef Software, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

module Opscode
  module IIS
    module Helper
      if RUBY_PLATFORM =~ /mswin|mingw32|windows/
        require 'chef/win32/version'
      end

      require 'rexml/document'
      include REXML

      def self.older_than_windows2008r2?
        if RUBY_PLATFORM =~ /mswin|mingw32|windows/
          win_version = Chef::ReservedNames::Win32::Version.new
          win_version.windows_server_2008? ||
          win_version.windows_vista? ||
          win_version.windows_server_2003_r2? ||
          win_version.windows_home_server? ||
          win_version.windows_server_2003? ||
          win_version.windows_xp? ||
          win_version.windows_2000?
        end
      end

      def is_new_value?(document, xpath, value_to_check)
        return XPath.first(document, xpath).to_s == value_to_check ? false : true
      end

      def is_new_or_empty_value?(document, xpath, value_to_check)
        return is_new_value(document, xpath, value_to_check) || value_to_check == '' ? false : true
      end

      def appcmd(node)
        @appcmd ||= begin
          "#{node['iis']['home']}\\appcmd.exe"
        end
      end
    end
  end
end