Rails::Railtie:创建Rails 3 gem时出现问题

我真的需要另一双眼睛来观察这个,所以我想我会把它贴在这里。 如果我跳过Railtie,把它作为initializers文件夹中的传统monkeypatch来做,就可以了。使用铁轨。。。没有什么。

从表面上看,我的铁轨从来没有被处决,因此似乎没有其他事情发生。

有人看到这里有什么问题吗?

项目文件:

gem 'sql_explain', :path => "/home/mike/projects/sql_explain/"

gemspec公司:

...
  spec.files = %w(README.rdoc sql_explain.rb lib/sql_explain.rb lib/railtie.rb sql_explain.gemspec)
...

require 'lib/railtie.rb'

铁路.rb

require 'active_record'
require 'sql_explain'

module SqlExplain
  class Railtie < Rails::Railtie
    railtie_name :sql_explain
    initializer 'sql_explain.extend.activerecord' do
      if defined?(ActiveRecord)
        ActiveRecord::ConnectionAdapters::MysqlAdapter.include SqlExplain::AR
      end
    end
  end
end

sql语句_解释.rb

module SqlExplain
  module AR
    def self.included(base_klass)
      base_klass.send :alias_method_chain, :select, :explain
    end


    def select_with_explain(sql, name = nil)
      @connection.query_with_result = true
      result = execute('explain ' + sql, :skip_logging)
      rows = []
      result.each_hash { |row| rows << row }
      result.free
      @connection.more_results && @connection.next_result    # invoking stored procedures with CLIENT_MULTI_RESULTS requires this to tidy up else connection will be dropped
      exp_string = ""
      rows.each{|row| row.each_pair{|k,v| exp_string += " #{k}: #{v} |"}}
      log(exp_string, "Explanation") {}
      select_without_explain(sql, name)
    end
  end
end