How to fill and access a Django ArrayField?

Question

To solve my (kinda specific) problem, I found that I have to use Django ArrayField: https://docs.djangoproject.com/en/2.1/ref/contrib/postgres/fields/#arrayfield

I have defined it in my models.py file as

Bla = ArrayField(
        models.IntegerField(),
        size=4
        null=True
        )

But how do I actually put information inside? Ideally both a whole python list, as also at a single place.

And once it is in there, how can I retrieve it? Both on python side, as also in the .html file?

PS: I don't think that the whole background of the problem is relevant, so I omitted it for now, but I will of course provide all necessary details if anyone is interested.

Answer 1

You just assign a list of integers.

class M(models.Model):
    bla = ArrayField(models.IntegerField(), size=4, null=True)

m = M.objects.create(bla=[1, 3, 3, 7])

# (or, equivalently,)

m = M()
m.bla = [1, 3, 3, 7]
m.save()

# (or, equivalently,)

m = M(bla=[1, 3, 3, 7])
m.save()

Reading m.bla, you get back a list of integers, which you can access in Python or Django templates like any other list.

See also the documentation on the various extra lookups for ArrayFields.