Django select max id

Question

given a standard model (called Image) with an autoset \'id\', how do I get the max id?

So far I\'ve tried:

max_id = Image.objects.all().aggregate(Max         


        

Answer 1

Latest object without catching exception and using django orm:

Image.objects.filter().order_by('id').first()

Answer 2

Your logic is right, this will return the max id

res = Image.objects.filter().aggregate(max_id=Max('pk'))
res.get('max_id')

Answer 3

this also work perfectly:

max_id = Image.objects.values('id').order_by('-id').first()

Answer 4

In current version of django (1.4) it is even more readable

Image.objects.latest('id').id

Answer 5

I know this already has a right answer but here it's another way of doing it:

prev = Image.objects.last()

This gives you the last object.

Answer 6

Just order by reverse id, and take the top one.

Image.objects.all().order_by("-id")[0]