关闭“updated_at” Rails中的列 [英] Turn off "updated_at" column in Rails

问题描述

我有一个简单的Log模型，记录调用控制器操作的事实。

I have a simple "Log" model, that records the fact of calling controller's action.

这个log记录的条目应该创建一次，从未改变。此外，我将在数据库中有许多这些记录。

Entries of this "log" record are supposed to be created once and never altered. Also, I will have many of these records in the database.

因此，没有必要使用updated_at列（不需要浪费硬盘上的内存）。

So, there is no need for "updated_at" column (don't need to waste the memory on HDD).

如何告诉Rails只留下created_at列而不使用updated_at？

How can I tell to Rails to leave only "created_at" column and not to use "updated_at"?

有没有办法使Log模型只读？

Is there any way to make the "Log" model read only?

推荐答案

readonly？方法。

class Log < ActiveRecord::Base
    # Prevent modification of existing records
    def readonly?
       !new_record?
    end

    # Prevent objects from being destroyed
    def before_destroy
      raise ActiveRecord::ReadOnlyRecord
    end

end

上面的示例是从此处。

如果您不需要 updated_at 列，只需从数据库中删除（或不添加）它。 Rails不会更新没有的内容。

If you don't need the updated_at column, just remove (or don't add it) it from your database. Rails won't update what's not there.

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