def field_cols(model):
        """ Get the models columns in a friendly SQL format

        This will be a string of comma separated field
        names prefixed by the models resource type.

        TIP: to_manys are not located on the table in Postgres
             & are instead application references, so any reference
             to there column names should be pruned!

        :return: str
        """

        to_many = model.to_many
        cols = [f for f in model.all_fields if f not in to_many]
        cols = ', '.join(cols)

        return cols or None