docs: def make_column_suffixes(self):
          """ Make sure we have the right column suffixes. These will be appended
          to `id` when generating the query.
          """
          if self.column_suffixes:
              return self.column_suffixes
  
          if len(self.columns) == 0:
              return ()
  
          elif len(self.columns) == 1:
              if self.formatters:
                  return '_raw',
              else:
                  return '',
  
          elif len(self.columns) == 2:
              if self.formatters:
                  return '_id', '_raw',
              else:
                  return '_id', '',
          else:
              raise BadIngredient(
                  'column_suffixes must be supplied if there is '
                  'more than one column'
              )