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Python Django Basics Django Templates Add a Detail View

Dat Ngo
Dat Ngo
1,309 Points

What is pk

I don't understand what pk is? Can anyone help me?

2 Answers

pk is the attribute that contains the value of the primary key for the model.

Alex Koumparos
seal-mask
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,862 Points

To clarify Lazarus's answer, pk is a shortcut to the model field that is the primary key, i.e., it contains a reference to the primary key field, not the primary key value itself.

For example, if you had a model User and specified a primary key with the name user_id, you could query the primary key like this:

User.objects.get(user_id=3)

Since looking up objects by primary key is so common, Django provides pk as a convenience shortcut so we don't need to remember the actual primary key name. Thus we can write the same query like this:

User.objects.get(pk=3).

For more details, you can check out the official Django documentation