@property
    def accessor(self):
        return self.column.accessor or Accessor(self.name)
Deals with a model changing its index_together.
dataset/ETHPy150Open bradleyayers/django-tables2/django_tables2/columns/base.py/BoundColumn.accessor--crossover with--dataset/ETHPy150Open django/django/django/db/backends/base/schema.py/BaseDatabaseSchemaEditor.alter_index_together