Rails日期验证与年龄 [英] rails date validation with age

问题描述

在我的Rails应用程序中，有一个包含DOB字段的注册表单。

用户的年龄不必超过18岁。我如何对此进行验证。

In my rails application there's a signup form which includes a DOB field.
The user's age need not to be more than 18.How can i give validation for this one.

我的dob格式为mm / dd / yy

My dob format is mm/dd/yy

推荐答案

语法非常有趣，您可以执行以下操作：

The syntax for this is pretty fun, you could do something like this:

old_enough = ("10/23/2000".to_date + 18.years) < Date.today

将字符串转换为日期，加上18年，然后看是否在日期之前或

Turn your string into a date, add 18 years, and see if it is before or after today.

如果您想将其放入模型验证器中，此railscast可能会有用：
http://railscasts.com/episodes/211-validations-in-rails-3

If you want to put this in a model validator, this railscast could be useful: http://railscasts.com/episodes/211-validations-in-rails-3

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