module Mongoid::Association::Embedded::EmbedsOne::Buildable

def build(base, object, _type = nil, selected_fields = nil)

Returns:
  • (Document) - A single document.

Parameters:
  • selected_fields (Hash) -- Fields which were retrieved via
  • _type (String) -- Not used in this context.
  • object (Document | Hash) -- The related document.
  • base (Document) -- The document this association hangs off of.

Other tags:
    Example: Build the document. - 
def build(base, object, _type = nil, selected_fields = nil)
  if object.is_a?(Hash)
    if _loading? && base.persisted?
      Factory.execute_from_db(klass, object, nil, selected_fields, execute_callbacks: false)
    else
      Factory.build(klass, object)
    end
  else
    clear_associated(object)
    object
  end
end

def clear_associated(doc) 

def clear_associated(doc)
  if doc && (inv = inverse(doc))
    if associated = doc.ivar(inv)
      associated.substitute(nil)
    end
  end
end