CODEWITHSUNDEEP
django
AngelQuesada
AngelQuesada

Reputation: 431

Why can't I use ".update()" with a Django object?

I've been trying to update a Django object with:

object_name.update(name="alfred")

The thing is that when I get the object name this way:

object_name = myobject.objects.get(id=object_id)

the method update won't work.

But when I get the object this way:

object_name = myobject.objects.filter(id=object_id)

it will work

Why does this happen? Is it because the last object is a queryset? Is there anyway to use .update with a django object?

thank you!

Upvotes: 0

Views: 103

Answers (1)

wfehr
wfehr

Reputation: 2225

As the comments already stated, you can't use .update() on a model instance itself - unless you created the function on the model yourself.

.update() is being used on querysets (see docs).

If you want to save the changes for a model instance, use save(), example:

obj = MyModel.objects.get(...)
obj.some_field = 'some-other-value'
obj.save()

Also see the docs on how to save changes to objects.

Example on how you could implement MyModel.update():

class MyModel(...):
    ...  # fields etc.

    def update(self, **kwargs):
        for k, v in kwargs.items():
           setattr(self, k, v)
        self.save()

Upvotes: 2

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