# Missing translation for activerecord error: taken (uniqueness)

**URL:** <https://www.ruby-forum.com/t/missing-translation-for-activerecord-error-taken-uniqueness/192832>\
**Category:** Rails I18n\
**Created:** [August 6, 2010, 5:10pm UTC](https://www.ruby-forum.com/t/missing-translation-for-activerecord-error-taken-uniqueness/192832 "2010-08-06T17:10:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![QuBiT](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/q/e19b73/32.png) [@QuBiT](https://www.ruby-forum.com/u/QuBiT)\
**Post date:** [August 6, 2010, 5:10pm UTC](https://www.ruby-forum.com/t/missing-translation-for-activerecord-error-taken-uniqueness/192832/1 "2010-08-06T17:10:36Z")

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Hi!

I am using Rails3.0.0.rc and get an error which do not occur on  
Rails2.3.5

In my model I have:

validates :title, :presence =\> true, :uniqueness =\> true

when I start up the console and enter:

x=Blog.new  
x.valid? --\> false  
x.errors --\> OrderedHash{:title =\> [“can’t be blank”]}  
x.title=“an\_existing\_title”  
x.valid? --\> false  
x.errors --\> OrderedHash{:title=\> [“translation missing: en,  
activerecord, errors, models, blog, attributes, title, taken”]}

In Rails2.3.5 this error does not occur. (“title has already been  
taken”)

Is this an i18n error or is this a rails3.0.0.rc error?

---

<div class="post-metadata">

**Author:** ![QuBiT](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/q/e19b73/32.png) [@QuBiT](https://www.ruby-forum.com/u/QuBiT)\
**Post date:** [August 6, 2010, 6:58pm UTC](https://www.ruby-forum.com/t/missing-translation-for-activerecord-error-taken-uniqueness/192832/2 "2010-08-06T18:58:54Z")

</div>

Sorry for blaming I18n or Rails, it was a very strange error caused by  
another gem.

[http://github.com/joekhoobyar/composite\_primary\_keys/blob/master/lib/composite\_primary\_keys/validations/uniqueness.rb](http://github.com/joekhoobyar/composite_primary_keys/blob/master/lib/composite_primary_keys/validations/uniqueness.rb)  
( record.errors.add(attribute, :taken, :value =\> value) solves that  
issue )

_SOLVED_ 🙂