Can Mongoid `any_of` include use of external document relationships?

I'开发者_开发技巧m using MongoDB with Mongoid and trying to put in place a rudimentary search as a placeholder before we look at weighting, etc. The any_of method seems to be finding my embedded documents but not those linked by relations. Does anyone know if any_of can include relationships to other documents in the db, and if so what the syntax would be?

belongs_to :principal #owner
belongs_to :account #owner

scope :search, ->(text) { any_of(
  {:description => /#{text}/i}, 
  {:name => /#{text}/i}, 
  {"entries.title" => /#{text}/i}, 
  {"entries.description" => /#{text}/i}, 
  {:tags => /#{text}/i}, 
  {"account.name" => /#{text}/i},  # Not finding by account name - because account isn't embedded?
  {"principal.name" => /#{text}/i} # Not finding by principal name - because not embedded?
)}

No, any_of is the equivalent of a MongoDB $or query, so the native MongoDB would be something like:

db.collection.find(
{ "text" :
  { "$or" :
    [ { "account.name" => /#{text}/i }, { "principal.name" => /#{text}/i } ]
  }
})

Mongo queries only run over a single collection, so to resolve the account.name and principal.name fields they'd need to be embedded inside the document, e.g.

{
    text:
    {
        description: "...",
        name: "...",
        account: { name: "..." },
        principal: { name: "..." }
    }
}