ruby on rails - Nested Querying in Mongoid in 2013 -

so question 2 years old:

querying embedded objects in mongoid/rails 3 ("lower than", min operators , sorting)

and way recommends query nested objects less or greater than:

current_user.trips.where('start.time' => {'$gte' => time.now}).count 

simply doesn't work, returns 0 numerous queries have wrong. i've tried

current_user.trips.where(:'start.time'.gte => time.now}).count 

which 0. none of these throw error.

what correct syntax querying nested elements nowadays? seems fair bit of confusion on this.

it works expect in environment. (mongoid 3.1.3)

class user   include mongoid::document   embeds_many :trips end  class trip   include mongoid::document   embeds_one :start   embedded_in :user end  class start   include mongoid::document   field :time, type: datetime   embedded_in :trip end  user.create({ trips: [   trip.new({ start: start.new({ time: 5.days.ago }) }),   trip.new({ start: start.new({ time: 2.days.from_now }) }) ] })  current_user = user.where({}).first  p current_user.trips.where('start.time' => {'$gte' => time.now}).count p current_user.trips.where(:'start.time'.gte => time.now).count 

the above code outputs following:

1 1 

is $gte correct? common mistake use opposite sign when comparing dates.

or might because using older version of mongoid.

update:

you can check queries mongoid generates following code:

mongoid.logger.level = logger::debug moped.logger.level = logger::debug mongoid.logger = logger.new($stdout) moped.logger = logger.new($stdout) 

this useful debugging.