这个可能有点复杂,或者我只是困惑
我在一个页面上有两个表单。一个是表单,另一个是表单。我的目标是根据表单中的字段验证formset中的字段。我对当前正在发生的事情的猜测是,我将Project表单ID传递给formset的方法发生的方式是它没有被选中用于表单集验证。
错误
if target > project.target_date:
异常值:'NoneType'对象没有属性'target_date'
目前无需验证的代码:注意,我正在设置项目以在Milestones模型上允许null。我希望它不允许null,但这是我能弄清楚如何将project_id传递给里程碑表单的唯一方法。
View.py
def ProjectAdd(request): #Finish the template
qs = Project.objects.none()
if request.method == 'POST':
form = ProjectAddForm(request.POST)
formset = MilestoneFormSet(request.POST)
if form.is_valid() and formset.is_valid():
project = form.save()
instances = formset.save(commit=False)
for instance in instances:
instance.project_id = project.id
instance.save()
return HttpResponseRedirect(reverse('project.views.detail', args=(project.id,)))
else:
form = ProjectAddForm()
formset = MilestoneFormSet(queryset=qs)
return render_to_response('project/addProjectForm.html', {
'form': form,
'formset': formset,
'current_date': current_date,
}, context_instance=RequestContext(request))
Models.py
class Milestone(models.Model):
project = models.ForeignKey(Project, blank=True, null=True)
target_date = models.DateField('Target Date')
forms.py
MilestoneFormSet = modelformset_factory(Milestone, extra=1, max_num=50)
我想要使用验证的代码。现在除了forms.py:
之外,一切都是一样的forms.py
class MilestoneForm(forms.ModelForm):
def clean(self):
if any(self.errors):
raise forms.ValidationError("")
data = self.cleaned_data
target = data["target_date"]
project = data["project"]
if target > project.target_date:
raise forms.ValidationError("Target Date is beyond the project target date - Project Target: %s" % target)
if target < project.start_date:
raise forms.ValidationError("Target Date is before the start date of the project - Project Start: %s" % project.start_date)
return data
MilestoneFormSet = modelformset_factory(Milestone, form=MilestoneForm, extra=1, max_num=50)
答案 0 :(得分:1)
问题是Milestone.project可以是None
。
当您project = data['project']
通过支票if project is None: raise forms.ValidationError('No project is assigned to this milestone.'
我之前提到过这个问题too,一定是错过了它。)。