Mongoid: How to load only some fields of an object you lazy load via reference?

Question

For performance reason, I use as often as possible the only() keyword when writing up a mongoid query in order to specify the fields I want to load.

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Answer 1

I think you need to denormalize here. First of all, read A Note on Denormalization.

You can implement denormalization by self using mongoid events or use great mongoid_denormalize gem. It pretty straight and after implementing it you could use p.user_email or something in your queries.

Answer 2

Answer from creator of Mongoid. It's not possible yet. It's been added as feature request.