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模型(无视错别字/次要的语法问题,这只是伪代码):Django - 模型中的交易?
class SecretModel(models.Model):
some_unique_field = models.CharField(max_length=25, unique=True) # Notice this is unique.
class MyModel(models.Model):
secret_model = models.OneToOneField(SecretModel, editable=False) # Not in the form
spam = models.CharField(max_length=15)
foo = models.IntegerField()
def clean(self):
SecretModel.objects.create(some_unique_field=self.spam)
现在,如果我去做到这一点:
MyModel.objects.create(spam='john', foo='OOPS') # Obviously foo won't take "OOPS" as it's an IntegerField.
#.... ERROR HERE
MyModel.objects.create(spam='john', foo=5) # So I try again here.
#... IntegrityError because SecretModel with some_unique_field = 'john'
already exists.
我明白,我可以把这个与视图一个关于它的请求事务,但我希望这可以在管理员和API中使用,而不仅仅是表单或视图。这怎么可能?
@Ignacio谢谢。这很好找出来。 – orokusaki 2010-03-12 15:55:55