# \[ANN\] Composite Primary Keys support for Associations

**URL:** <https://www.ruby-forum.com/t/ann-composite-primary-keys-support-for-associations/100985>\
**Category:** Rails\
**Created:** [August 2, 2006, 11:06am UTC](https://www.ruby-forum.com/t/ann-composite-primary-keys-support-for-associations/100985 "2006-08-02T11:06:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![nicwilliams](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/aca169/32.png) [@nicwilliams](https://www.ruby-forum.com/u/nicwilliams)\
**Post date:** [August 2, 2006, 11:06am UTC](https://www.ruby-forum.com/t/ann-composite-primary-keys-support-for-associations/100985/1 "2006-08-02T11:06:32Z")

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Announcement:  
Composite Primary Keys gem now includes support for ActiveRecord  
Associations.

Summary:  
Composite Primary Keys allows an ActiveRecord to support 2+ primary keys  
using the set\_primary\_keys class method. Previous versions provided full  
CRUD and find support. This latest release provides support for more  
ActiveRecord magic: associations (has\_many, belongs\_to, etc)

Full report:  
[http://drnicwilliams.com/2006/08/02/composite-primary-keys-supports-associations/](http://drnicwilliams.com/2006/08/02/composite-primary-keys-supports-associations/)

Cheers  
Dr Nic