Django - 批量更新arrayfield行postgres

Question

How do I update multiple rows

I've a model,

class ModelA(models.Model):
    colA = ArrayField(models.IntegerField())

I want to update all the rows of ModelA, ie for eg:- I want to append 1 in all the rows of column colA .

Had it been a normal column, I would have done the following :-

ModelA.objects.all().update(colA="foo")

How can I bulk update Arrayfield?

Answer 1

I don't think its possible to do currently, I think the best you can do is to do it is to iterate over the models.

for model in ModelA.objects.all():
    for val in model_a.colA:
        val = val + 1
    model.save()

You can do this as an atomic transaction as well if you wish.. Although it may be worth considering if this field really should be an array field.

Answer 2

You can try using the django-bulk-update package. Although I'm not sure whether it can handle ArrayField

Answer 3

Why not do a database migration? Django's database migration system should allow you to do this easily, I believe.