code: def handle(self, *args, **options):
          
          batch_size = options.get('batchsize', None)
          if not batch_size:
              # py34-django18: batchsize is set to None if the user don't set
              # the value, instead of not be present in the dict
              batch_size = 1000
  
          self.stdout.write('The following models were reindexed:')
          for model in get_registered_model():
              if options.get('model', None) and not (model.__name__ in
                                                     options['model']):
                  continue
  
              counts = reindex_all(model, batch_size=batch_size)
              self.stdout.write('\t* {} --> {}'.format(model.__name__, counts))
docs: Run the management command.