python get_or_create() 是否必须立即保存？(姜戈)
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Does get_or_create() have to save right away? (Django)
提问by rick
I need to use something like get_or_create() but the problem is that I have a lot of fields and I don't want to set defaults (which don't make sense anyway), and if I don't set defaults it returns an error, because it saves the object right away apparently.
我需要使用 get_or_create() 之类的东西，但问题是我有很多字段，我不想设置默认值（无论如何都没有意义），如果我不设置默认值，它会返回一个错误，因为它显然立即保存了对象。
I can set the fields to null=True, but I don't want null fields.
我可以将字段设置为 null=True，但我不想要空字段。
Is there any other method or any extra parameter that can be sent to get_or_create() so that it instantiates an object but doesn't save it until I call save() on it?
是否有任何其他方法或任何额外的参数可以发送到 get_or_create() 以便它实例化一个对象但在我调用 save() 之前不会保存它？
Thanks.
谢谢。
采纳答案by Noah Medling
You can just do:
你可以这样做：
try:
obj = Model.objects.get(**kwargs)
except Model.DoesNotExist:
obj = Model(**dict((k,v) for (k,v) in kwargs.items() if '__' not in k))
which is pretty much what get_or_createdoes, sans commit.
这几乎是什么get_or_create，没有提交。
