Order without direction gives an unhelpful error message

[gaffneyc]

If you fail to give a direction for an order you get this really unhelpful error message:

"field_one".__sort_option__

NoMethodError:
  undefined method `to_direction' for nil:NilClass

What would be the best approach here? Converting an app from another ORM that defaults to ascending order if not specified and was thinking of doing that.

If there is a preferred direction for this I'll put together a pull request with a fix.

[sshaw]

Agreed. Really this should be mentioned in one of[1] the Mongoid docs[2]. I had to do some DuckDuckGoing to even figure out it was an option, and issue searching to figure out the solution.

[1] http://rdoc.info/gems/mongoid/3.1.6/Mongoid/Relations/Macros/ClassMethods#has_many-instance_method
[2]http://mongoid.org/en/mongoid/docs/relations.html