Comments on: Ruby on Rails has_many :through NameError: uninitialized constant

By: Will

Will — Mon, 09 Jan 2012 22:29:32 +0000

WOW!! thanks!!! years later this also saved me!! i spent 3 hours and found this to be my saving grace…

Dam pluralisation!!

By: Steven Arnold

Steven Arnold — Thu, 13 Oct 2011 04:54:58 +0000

I could have spent a LONG time on this. Thanks! Good catch…years later.

By: Ernest

Ernest — Mon, 18 Jul 2011 15:13:17 +0000

Thanks a lot!!! You are my savior!!!!!

By: anbrie

anbrie — Wed, 25 May 2011 02:53:09 +0000

Thanks. Much.

By: Chris

Chris — Sat, 07 May 2011 21:49:23 +0000

Small addition: I had a very similar problem in that I was getting this exact error. Mine turned out to be a naming convention problem where I had named the class file of my join table pluralized, but the actual class name was not. In the terms of your example I would have had file name: memberships.rb and class name Membership.

Weirdness. Thanks for the posting nonetheless as it got me looking at pluralization.

By: Richard

Richard — Mon, 18 Apr 2011 08:02:32 +0000

Man I hate Ruby. I think I’m done with it… too many vague errors. At least in Java/C# you can tell what’s going on.

By: eddie

eddie — Fri, 01 Apr 2011 10:20:19 +0000

Your Post Saved My Butt Tonight!

I did not have the same problems, but similar issues. Go figure… It was Rails ‘Naming Convention’ !!!. Thanks a million. Now I can move on.

By: RailsNoob

RailsNoob — Fri, 11 Mar 2011 22:25:14 +0000

Thanks man. The application was up and running after this.

By: Dan Doherty

Dan Doherty — Thu, 10 Mar 2011 21:46:02 +0000

Mega dittos.

Also a couple of comments:

1. In the Third Edition of “Agile Web Development with Rails” on pp 370 and following, they use the plural form of the table name. Perhaps this was changed in Rails 3?

2. It would seem that rather than throw an ‘INTERNAL ERROR’ rails could try to singularize the name and try again, or at least suggest that a singular ought to be used.

By: Snorri Páll

Snorri Páll — Thu, 10 Mar 2011 21:20:02 +0000

Thank you :)