How can I use a model from a gem in Rails 3?
===

I have a gem that has some ActiveRecord-derived models.  They are tested and work. 

I've added a dependency to that gem, but when I try to access pages that refer to that model in a form_for statement, for example, I get the dreaded method_missing error:

`undefined method `mygem_mymodel_path'`


Note I had the models in my app/models directory as is usual and all was well; migrating my models to this gem has been the cause for grief.

Any pointers?