Model.find is useless

[knowtheory]

Model.find only takes one of 4 arguments right now: an id, :first, :last, or :all. If passed another argument (such as a hash), it simply returns nil.

The find method should either throw an error if it doesn't get it's expected input, or it should be expanded to map more of ActiveRecord's finder syntax onto DataMapper.

[dkubb]

I would vote for throwing an exception now, then looking to extend the finder syntax later.

[knowtheory]

That's my preference!