Adding to ArrayField in Django 1.10.6 with postgres

Question

I'm trying to create a list in PostgreSQL of filenames and update the list on the fly.

my model(Package):

completed_uploads=ArrayField(models.TextField(blank=True), null=True, default=list)

creating the list:

Package.create(...,
completed_uploads = [])

my update code:

packageInstance = Package.objects.get(id=packageId)
completed_uploads = packageInstance.completed_uploads.append(request.data['filepath'])
Package.objects.filter(id=packageId).update(node = request.data['node'], completed_uploads=completed_uploads, prefix=request.data['prefix'] )

edit I changed the above to list instead of list() --- now I get the error:

'NoneType' object has no attribute 'append' on the second time the function is called. when I check my database the field 'completed_uploads' is null

Note you should use default=list instead of default=list(). — Alasdair
– Alasdair, Commented Apr 26, 2018 at 14:32
This question was written for Django 1.8 so might be out of date, but some of the answers might help — Alasdair
– Alasdair, Commented Apr 26, 2018 at 14:33

GeneralBear · Accepted Answer · 2018-04-26 18:26:00Z

1

Just needed to change to:

packageInstance = Package.objects.get(id=packageId)
packageInstance.completed_uploads.append(request.data['filepath'])
Package.objects.filter(id=packageId).update(node = request.data['node'], completed_uploads=packageInstance.completed_uploads, prefix=request.data['prefix'] )

answered Apr 26, 2018 at 18:26

GeneralBear

1,0213 gold badges11 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Adding to ArrayField in Django 1.10.6 with postgres

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related