python - Django 模型管理器 objects.create 文档在哪里？

Question

我总是读到我应该使用

model = Model(a=5, b=6)
model.save()

但我刚刚看到有一个管理器函数 create，因为我看到一个开源 django 应用程序正在使用它。

model = Model.objects.create(a=5, b=6)
print model.pk
1

那么建议使用它吗？还是仍然首选使用 .save 方法。我猜 objects.create 无论如何都会尝试创建它，而如果指定了 pk，save 可能会保存现有对象。

这些是我找到的文档:https://docs.djangoproject.com/en/dev/topics/db/queries/#creating-objects

Answer 1

p = Person.objects.create(first_name="Bruce", last_name="Springsteen")

相当于:

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.