Question

I know that my problem is the trivial one, but I need some help.

I have two mongoid classes with has_many relation:

class Container
    ...
    has_many: items
    ...
end

class Item
    ...
    field :date, type => Date
    belongs_to: container
    ...
end

I need all containers that have item at the particular date.

Here is the scope that doesn’t work as expected. It returns both, the containters that do have, and the containers that don’t have items at the given date:

class Container
    ...
    scope :with_items_on, ->(date){ where(:_id.in => Item.on(date).only(:container_id).distinct(:container_id)) }
    ...
end

.on(date) is scope that returns correctly all Items for the given date.
Thanks.

Answer 1

Place.rb

has_many :reviews

Review.rb

belongs_to :place

Mongoid 3 does not support it

Place.where('reviews.state' => 'published')