# File lib/mongoid/relations/bindings/referenced/in.rb, line 21
          def bind
            unless _binding?
              _binding do
                inverse = metadata.inverse(target)
                base.you_must(metadata.foreign_key_setter, target.id)
                if metadata.inverse_type
                  base.you_must(metadata.inverse_type_setter, target.class.model_name)
                end
                if inverse
                  inverse_metadata = metadata.inverse_metadata(target)
                  if inverse_metadata != metadata && !inverse_metadata.nil?
                    base.metadata = inverse_metadata
                    if base.referenced_many?
                      target.send(inverse).push(base) unless Mongoid.identity_map_enabled?
                    else
                      target.do_or_do_not(metadata.inverse_setter(target), base)
                    end
                  end
                end
              end
            end
          end