ruby - to_sql 不适用于 update_attributes 或 .save

Question

我正在寻找一种方法来存储在更新或创建操作中生成的 sql 字符串。我试过将 .to_sql 附加到 update_attributes 的末尾，但它返回一个 TrueClass 错误(或类似的错误)。有什么我想念的吗？

Answer 1

In brief - you need to override ActiveRecord execute method. There you can add any logic for logging.

connection = ActiveRecord::Base.connection
class << connection
  alias :original_exec :execute
  def execute(sql, *name)
    # try to log sql command but ignore any errors that occur in this block
    # we log before executing, in case the execution raises an error
    begin
        file = File.open(RAILS_ROOT + "/log/sql.txt",'a'){|f| f.puts Time.now.to_s+": "+sql}
    rescue Exception => e
      ;
    end
    # execute original statement
    original_exec(sql, *name)
  end
end

学分:

https://stackoverflow.com/a/1629474/643500

https://stackoverflow.com/a/1640560/643500