Question

我开始研究现有的rails项目，在rails服务器输出中有这些额外的行：

User Load (10.3ms)  SELECT "users".* FROM "users" WHERE "users"."email" = 'miles@milestshirts.com' LIMIT 1
\_ Called from: app/controllers/application_controller.rb:10:in `block in <class:ApplicationController>'

基本上对于我的rails应用程序中的每个SQL查询，它添加了一个调用它的行。我似乎无法在Gemfile中找到它，因为它有超过150个宝石。

它不是https://github.com/ruckus/active-record-query-trace

Answer 1

看起来像Active Record Query Trace：

启用后，每个查询源都将记录为：

  IntuitAccount Load (1.2ms)  SELECT "intuit_accounts".* FROM "intuit_accounts" WHERE "intuit_accounts"."user_id" = 20 LIMIT 1
Called from:
  app/views/users/edit.html.haml:78:in `block in _app_views_users_edit_html_haml___1953197429694975654_70177901460360'
  app/views/users/edit.html.haml:16:in `_app_views_users_edit_html_haml___1953197429694975654_70177901460360'

Answer 2

我在项目lib文件夹中找到它。如果有人在这里是一个简单的代码：

module QueryTrace
  def self.enable!
    ::ActiveRecord::LogSubscriber.send(:include, self)
  end

  def self.append_features(klass)
    super
    klass.class_eval do
      unless method_defined?(:log_info_without_trace)
        alias_method :log_info_without_trace, :sql
        alias_method :sql, :log_info_with_trace
      end
    end
  end

  def log_info_with_trace(event)
    begin
    log_info_without_trace(event)
    trace_log = Rails.backtrace_cleaner.clean(caller).first
    if trace_log && event.payload[:name] != 'SCHEMA'
      logger.debug("   \\_ \e[33mCalled from:\e[0m " + trace_log)
    end
    rescue
    end
  end
end

什么宝石产生这个输出'\ _来自：'

2 个答案: