create with has_many through association gets NoMethodError (undefined method `name' for nil:NilClass)

Question

I\'m doing this tutorial and am stuck in the Tagging part. Basically I have articles that can have a list of tags. As one article can has multiple tags and vice versa, there

Answer 1

FYI, I can confirm this is an issue with ActiveRecord and Ruby 2.2. I was using ActiveRecord 3.2 and since changing to the 3-2-stable branch, the issue is gone. I believe this is fixed now in 4.x branches. I have raised an issue for this at https://github.com/rails/rails/issues/18991.