普通EX pressions与回报率4验证 [英] Regular expressions with validations in RoR 4
本文介绍了普通EX pressions与回报率4验证的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有以下code:
class Product < ActiveRecord::Base
validates :title, :description, :image_url, presence: true
validates :price, numericality: {greater_than_or_equal_to: 0.01}
validates :title, uniqueness: true
validates :image_url, allow_blank: true, format: {
with: %r{\.(gif|jpg|png)$}i,
message: 'URL must point to GIT/JPG/PNG pictures'
}
end
它的工作原理,但是当我尝试使用耙测试,以测试它,我会抓住这样的信息:
It works, but when I try to test it using "rake test" I'll catch this message:
rake aborted!
The provided regular expression is using multiline anchors (^ or $), which may present a security risk. Did you mean to use \A and \z, or forgot to add the :multiline => true option?
这是什么意思?我该如何解决这个问题?
What does it mean? How can I fix it?
推荐答案
^
和 $
的起始行和行末锚。
^
and $
are Start of Line and End of Line anchors.
string = "abcde\nzzzz"
# => "abcde\nzzzz"
/^abcde$/ === string
# => true
在 \ A
和 \ Z
是字符串常驻启动和String锚结束。
While \A
and \z
are Permanent Start of String and End of String anchors.
/\Aabcde\z/ === string
# => false
所以Rails是告诉你,你一定要使用 ^
和 $
?你难道不想使用 \ A
和 \ Z
呢?
So Rails is telling you, "Are you sure to use ^
and $
? Don't you want to use \A
and \z
instead?"
还有更多的是这里生成此警告铁轨的安全问题。
There is more on the rails security concern that generates this warning here.
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