docs: def _bypass_non_decrypted_field_exception(self):
          """Bypass exception if some field was not decrypted."""
          if getattr(settings, 'PGPFIELDS_BYPASS_NON_DECRYPTED_FIELD_EXCEPTION', False):
              return True
          if getattr(settings, 'PGPFIELDS_BYPASS_FIELD_EXCEPTION_IN_MIGRATIONS', False):
              # Since django versions <1.8 have no support of
              # Manager.use_in_migrations, need to turn raising
              # exception off.
              if {'manage.py', 'migrate'}.issubset(sys.argv):
                  return True
          return False