instance method init_internals

# File activerecord/lib/active_record/core.rb, line 437
    def init_internals
      pk = self.class.primary_key
      @attributes[pk] = nil unless @attributes.key?(pk)

      @aggregation_cache        = {}
      @association_cache        = {}
      @attributes_cache         = {}
      @previously_changed       = {}
      @changed_attributes       = {}
      @readonly                 = false
      @destroyed                = false
      @marked_for_destruction   = false
      @destroyed_by_association = nil
      @new_record               = true
      @txn                      = nil
      @_start_transaction_state = {}
      @transaction_state        = nil
      @reflects_state           = [false]
    end