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Similar to get_or_create, I would like to be able to update_or_create in Django.
Until now, I have using an approaching similar to how @Daniel Roseman does it here. However, I'd like to do this more succinctly as a model method.
This snippet is quite old and I was wondering if there is a better way to do this in more recent version of Django.
824
str function in a django model returns a string that is exactly rendered as the display name of instances for that model. # Create your models here. This will display the objects as something always in the admin interface.
To create a new instance of a model, instantiate it like any other Python class: class Model (**kwargs) The keyword arguments are the names of the fields you've defined on your model. Note that instantiating a model in no way touches your database; for that, you need to save() .
The doc says: If the object's primary key attribute is set to a value that evaluates to True (i.e. a value other than None or the empty string), Django executes an UPDATE. If the object's primary key attribute is not set or if the UPDATE didn't update anything, Django executes an INSERT link.
There is update_or_create, eg::
obj, created = Person.objects.update_or_create( first_name='John', last_name='Lennon', defaults={'first_name': 'Bob'}, ) # If person exists with first_name='John' & last_name='Lennon' then update first_name='Bob' # Else create new person with first_name='Bob' & last_name='Lennon' If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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