init_internals

# File activerecord/lib/active_record/core.rb, line 837
      def init_internals
        @readonly                 = false
        @previously_new_record    = false
        @destroyed                = false
        @marked_for_destruction   = false
        @destroyed_by_association = nil
        @_start_transaction_state = nil

        klass = self.class

        @primary_key         = klass.primary_key
        @strict_loading      = klass.strict_loading_by_default
        @strict_loading_mode = klass.strict_loading_mode

        klass.define_attribute_methods
      end