相关疑难解决方法(0)

嗯,由于某种原因,即使在最简单的模型上,我似乎也无法让F正常工作.在这里Django 1.9.x.

最简单的形式,TestAccount

class TestAccount(models.Model):
    decimal = models.DecimalField(max_digits=5, decimal_places=2)
    integer = models.IntegerField()



In [1]: ta = TestAccount()

In [2]: ta.integer = 1

In [3]: ta.decimal = 1

In [4]: ta.save()

In [5]:

In [5]:

In [5]: ta
Out[5]: <TestAccount: TestAccount object>

In [6]: ta.id
Out[6]: 1L

In [7]: from django.db.models.expressions import F

In [8]: ta = TestAccount.objects.get(id=1)

In [9]: ta.integer = F('integer') + 1

In [10]: ta.save()
---------------------------------------------------------------------------
ValidationError                           Traceback (most recent call last)
<ipython-input-10-6e9eda341b34> in <module>()
----> 1 ta.save() …