如何在 Rails 中使数据库字段只读? [英] How to make a database field read-only in Rails?

问题描述

我有一个包含某个字段的数据库表，一旦将其插入到数据库中，就不可能更新.我如何告诉我的模型它不应该允许更新某个字段?

I have a database table with a certain field which should be impossible to update once it has been inserted to the database. How do I tell my model that it shouldn't allow updating of a certain field?

推荐答案

您想使用 attr_readonly:

列为只读的属性将用于创建新记录，但更新操作将忽略这些字段.

Attributes listed as readonly will be used to create a new record but update operations will ignore these fields.

class Customer < ActiveRecord::Base
    attr_readonly :your_field_name
end

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