6
As Rebus says in the comments, you don’t need to define the primary key explicitly. But if you do, you must make sure it is an autoincrement field – ie AutoField – not a basic IntegerField as you have. The way you have it, there’s no way to get a new ID, which is why it’s blank on save.
0
System generated database keys must be set by the database or else you won’t have a multi-user database.
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