coercing to Unicode: need string or buffer, NoneType found when rendering in django admin

Question

I have this error since a long time but can\'t figure it out :

Caught TypeError while rendering: coercing to Unicode: need string or buffer, NoneType found

Answer 1

The return value def __unicode __ should be similar to the return value of the related models (tables) for correct viewing of "some_field" in django admin panel. You can also use:

def __str__(self):
    return self.some_field