Hi, I’m new to this list and to rails, so I’m sorry if this subject is
repetead or too obvious.
I have two models: Topic and University, both in production. I want to make
University to inherit from Topic, but when I do this:
University < Topic
My universities data just disapear (and reapears if the changes are undone).
Are you trying to setup a single table inheritance type thing? When
you say that your universities data disappears, do you mean that
University.all no longer returns any data?
Switching from your previous setup to a single table inheritance
situation means that mongomapper will be looking in the topics
collection when you do University.all, so I’m not surprised that your
university data would appear to vanish, if you haven’t done anything
to move it from its previous collection.
This is exactly it, I’m trying to add the topics behavior to the default
behavior of universities and University.all just returns []
How do I change the University? I was unable to find references to it.
I’ve only dabbled with mongomapper, but my understanding is that if
you move from two separate collections to a single collection
inheritance setup, you’re going to need to move all the data from the
old universities collection to the topics collection