如题。 程序中使用到了 rufus/scheduler。

代码是这样的：

def run
   # db operation
    threads << Thread.new(keyword) do |k|
      # db operation
    end
end

def db(&block)
    begin 
        Connection::Weibowarning.conn
        yield
    rescue =>ex     
        raise ex
    ensure
        ActiveRecord::Base.connection.close
    end
end

scheduler.every '60s' do
    db { run }
end

然后就会报： DEPRECATION WARNING: Database connections will not be closed automatically, please close your database connection at the end of the thread by calling close on your connection. For example: ActiveRecord::Base.connection.close

我试过在 run 方法中的两个 db operation 前后分别连接和关闭，但是也会提示这个错。

请问该怎么解决呢？