Override `cast_callback` method.

def cast_callback(value):
        """Override `cast_callback` method.
        """
        # Postgresql / MySQL drivers change the format on 'TIMESTAMP' columns;

        if 'T' in value:
            value = value.replace('T', ' ')

        return datetime.strptime(value.split('.')[0], '%Y-%m-%d %H:%M:%S')