association lookup?

I feel like this might be a very simple problem and something just
isn't catching my eye in the API.

I'm writing a sort of verification form that allows you to add
individual fields to verify single attributes from the original form.
Each attribute has search conditions associated with it based on its
type, and I need to lookup what kind of classes the object from the
form 'has_many' and 'belongs_to' has.

I imagine there's something as simple as:

=> ['users', 'posts']
=> ['user', 'comment', 'blog']

Thanks in advance.

Found my answer here: