class Mongoid::Association::Referenced::HasAndBelongsToMany::Eager

Eager class for has_and_belongs_to_many associations.

Private Instance Methods

group_by_key() click to toggle source
# File lib/mongoid/association/referenced/has_and_belongs_to_many/eager.rb, line 43
def group_by_key
  @association.foreign_key
end
key() click to toggle source
# File lib/mongoid/association/referenced/has_and_belongs_to_many/eager.rb, line 47
def key
  @association.primary_key
end
keys_from_docs() click to toggle source
# File lib/mongoid/association/referenced/has_and_belongs_to_many/eager.rb, line 31
def keys_from_docs
  keys = Set.new
  @docs.each do |d|
    keys += d.send(group_by_key)
  end
  keys.to_a
end
preload() click to toggle source
# File lib/mongoid/association/referenced/has_and_belongs_to_many/eager.rb, line 14
def preload
  @docs.each do |d|
    set_relation(d, [])
  end

  entries = {}
  each_loaded_document do |doc|
    entries[doc.send(key)] = doc
  end

  @docs.each do |d|
    keys = d.send(group_by_key)
    docs = entries.values_at(*keys).compact
    set_relation(d, docs)
  end
end
set_relation(doc, element) click to toggle source
# File lib/mongoid/association/referenced/has_and_belongs_to_many/eager.rb, line 39
def set_relation(doc, element)
  doc.__build__(@association.name, element, @association) unless doc.blank?
end