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I always read that I should use
model = Model(a=5, b=6) model.save()
But I just saw there is a manager function create, because I saw an opensource django app using it.
model = Model.objects.create(a=5, b=6) print model.pk 1
So is it suggested to use it? Or is it still preferred to use the .save method. I’m guessing that objects.create will try to create it no matter what, whereas save may save an existing object if the pk is specified.
These are the docs that I found: https://docs.djangoproject.com/en/dev/topics/db/queries/#creating-objects
p = Person.objects.create(first_name="Bruce", last_name="Springsteen")
p = Person(first_name="Bruce", last_name="Springsteen") p.save(force_insert=True)
The force_insert means that a new object will always be created.
Normally you won’t need to worry about this. However, if your model
contains a manual primary key value that you set and if that value
already exists in the database, a call to create() will fail with an
IntegrityError since primary keys must be unique. Be prepared to
handle the exception if you are using manual primary keys.
create essentially does the same. below is the source code for create.
def create(self, **kwargs): """ Creates a new object with the given kwargs, saving it to the database and returning the created object. """ obj = self.model(**kwargs) self._for_write = True obj.save(force_insert=True, using=self.db) return obj
it creates an instance and then saves it.
Basically, these two methods are equivalent. The usage of
Model.objects.create could be preferred since it is more suited to the style of Django.