Django save integer not null primary key value

Question

I am using django to develop my application. A landmark model class has integer not null primary key field (gid). I want to insert max(gid) + 1 value to that field but can't set it as auto increment. What is the best solution? I thot override save() in model so that i don't want to explicitly assign value to the gid field.

Plz help me to do it in efficiently...

Thanking you ,

Answer 1

Try latest

MyMobel.objects.latest('gid').gid + 1

This will take the latest value. Be careful to check if the model has no objects. In that case, set the gid to the first value you want