[Fixed]-Is there an easier way to either create or re-write exist object? django

by

1👍

As you said about get_or_create, you could do:

abc_instance, created = AbcModel.objects.get_or_create(field1='a', field2='b')

That would bring you the existent/created object as the first argument and a boolean as the second argument, that defines if it was got or created.

Additionally, field1 and field2 will be used for the filter, but you can set the defaults attribute, which will update the existing entry or be used for its creation.

abc_instance, created = AbcModel.objects.get_or_create(
    field1='a', field2='b',
    defaults={'field3': 'c', 'field4': 'd'}
)
👤Jourdan Rodrigues

0👍

You can use update_or_create: https://docs.djangoproject.com/en/2.0/ref/models/querysets/#update-or-create

However if the field you filter by is not unique, you might end up getting a MultipleObjectsReturned exception.

Another way to do this could be: 

num_updated = AbcModel.objects.filter(field1='a').update(field2='c')
if num_updated == 0:
    model = AbcModel.objects.create(field1='a', field2='c')

In num_updated you will have the number of rows updated in the first line of code.

I hope this helps a bit!

👤jbondia

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