Django: avoid “useless use of .all()”

Here’s a little ORM pet peeve of mine that may deepen your understanding of how QuerySets work.

Take this code:

Digger.objects.all().filter(height_cm__gt=200)

The .all() is unnecessary.

It’s equivalent to write:

Digger.objects.filter(height_cm__gt=200)

Why?

The manager, Digger.objects, already refers to …