# Out-cheat validates\_uniqueness\_of

**URL:** <https://www.ruby-forum.com/t/out-cheat-validates-uniqueness-of/105293>\
**Category:** Rails\
**Created:** [May 28, 2007, 3:01pm UTC](https://www.ruby-forum.com/t/out-cheat-validates-uniqueness-of/105293 "2007-05-28T15:01:21Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![jochen\_kaechelin](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/48db29/32.png) [@jochen\_kaechelin](https://www.ruby-forum.com/u/jochen_kaechelin)\
**Post date:** [May 28, 2007, 3:01pm UTC](https://www.ruby-forum.com/t/out-cheat-validates-uniqueness-of/105293/1 "2007-05-28T15:01:21Z")

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before\_save :strip\_strings

```
 validates_uniqueness_of :username
 validates_presence_of :username

 private

 def strip_strings
     self.username = username.gsub!(" ","")
 end

```

example:

username = " removed\_email\_address@domain.invalid "

becomes removed\_email\_address@domain.invalid  
and is stored in the datbase as removed\_email\_address@domain.invalid

“gissmoh @gissmoh. de”

becomes removed\_email\_address@domain.invalid  
and is stored in the datbase as removed\_email\_address@domain.invalid

So I have duplicate entries!!

---

<div class="post-metadata">

**Author:** ![jochen\_kaechelin](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/48db29/32.png) [@jochen\_kaechelin](https://www.ruby-forum.com/u/jochen_kaechelin)\
**Post date:** [May 28, 2007, 3:16pm UTC](https://www.ruby-forum.com/t/out-cheat-validates-uniqueness-of/105293/2 "2007-05-28T15:16:26Z")

</div>

use before\_validation : strip\_strings instead

before\_save occurs before Base.save, but after the validation

Jean-Etienne

> **[Domain2.hu](https://domain2.hu/www.woa.hu)**
>
> www.woa.hu megvásárolható domain a kiemelt domain nevek piacterén.

---

<div class="post-metadata">

**Author:** ![jochen\_kaechelin](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/48db29/32.png) [@jochen\_kaechelin](https://www.ruby-forum.com/u/jochen_kaechelin)\
**Post date:** [May 28, 2007, 3:20pm UTC](https://www.ruby-forum.com/t/out-cheat-validates-uniqueness-of/105293/3 "2007-05-28T15:20:22Z")

</div>

Jean-Etienne D. schrieb:

> use before\_validation : strip\_strings instead
> 
> before\_save occurs before Base.save, but after the validation

Hit! It works!! Thanx…

I think there’s still a lot to learn…puuuuh!!!