类似于模型和字段验证中的clean()方法和Django:管理后台的验证错误(尽管这个问题很早就被回答了,当时还没有模型验证),我希望通过模型验证来保持代码DRY,但是我一直遇到一个奇怪的错误。我的模型如下所示:
当我试图保存一个无效的模型(即开始日期晚于结束日期),而不是在管理页面上看到验证错误,我会得到以下异常:
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from django.db import models
from django.core.exceptions import ValidationError
from django.utils.translation import ugettext as _
class Period(models.Model):
class Meta:
app_label = 'nps'
name = models.CharField(max_length=40)
start = models.DateField()
end = models.DateField()
def clean(self):
if self.start > self.end:
raise ValidationError(
_("Start date must be before end date"),
code='invalid',
)
super(Period, self).clean()
def validate_unique(self, exclude=None):
conflicts = Period.objects.filter(
start__lte=self.end,
end__gte=self.start,
)
if any(conflicts):
raise ValidationError(
_("Periods may not overlap."),
code='invalid',
)
super(Period, self).validate_unique(exclude)
def __unicode__(self):
return "%s (%s - %s)" % (self.name, self.start.strftime('%m/%d/%Y') or None, self.end.strftime('%m/%d/%Y') or None)
当我试图保存一个无效的模型(即开始日期晚于结束日期),而不是在管理页面上看到验证错误,我会得到以下异常:
AttributeError at /admin/nps/period/add/
'ValidationError' object has no attribute 'error_dict'
Request Method: POST
Request URL: http://localhost:8000/admin/nps/period/add/
Django Version: 1.6.2
Exception Type: AttributeError
Exception Value:
'ValidationError' object has no attribute 'error_dict'
Exception Location: /opt/django_venv/local/lib/python2.7/site-packages/django/forms/models.py in _update_errors, line 327
Python Executable: /opt/django_venv/bin/python
Python Version: 2.7.3
Python Path:
['/opt/webapp',
'/home/vagrant/.pycharm_helpers/pydev',
'/opt/webapp',
'/vagrant',
'/opt/webapp/C',
'/Program Files (x86)/JetBrains/PyCharm 3.1.1/plugins/sass/lib/stubs/sass_functions.scss',
'/Python27',
'/opt/django_venv/lib/python2.7',
'/opt/django_venv/lib/python2.7/plat-linux2',
'/opt/django_venv/lib/python2.7/lib-tk',
'/opt/django_venv/lib/python2.7/lib-old',
'/opt/django_venv/lib/python2.7/lib-dynload',
'/usr/lib/python2.7',
'/usr/lib/python2.7/plat-linux2',
'/usr/lib/python2.7/lib-tk',
'/opt/django_venv/local/lib/python2.7/site-packages',
'/opt/webapp/webapp']
Server time: Tue, 8 Apr 2014 16:29:24 -0400
似乎管理员模板期望引发除
ValidationError
之外的其他内容。我是做错了什么还是这是Django中的一个错误?完整的堆栈跟踪可以在这里找到:https://gist.github.com/DBell-Feins/10170544
谢谢!