south migration: “database backend does not accept 0 as a value for AutoField” (mysql)

Question

I\'m new to django and trying to have a Foreign key back to users for an assignee and reporter. But when i\'m trying to apply the change with South i get the error

Answer 1

A long-long time ago there was a problem with Autofield.

https://code.djangoproject.com/ticket/17653

an interesting quotes:

A:

It seems you are trying to save 0 to a ForeignKey which points to an AutoField. But, this is illegal, as the AutoField will not accept that value and so the ForeignKey can not hold that value either.

B:

So this fix creates another problem when you need to be able to accept a value of 0 (or if you are working on a DB that already has a value of 0!) in an autofield. In my case, I need to accept an ID of zero so that my foreign key can point to zero so that a unique constraint can work properly.

It looks like you have 0 in "user"."user_id".
But again... Full StackTrace, please...