捕获django窗体中的验证错误
捕获django窗体中的验证错误
提问于 2012-01-25 21:52:05
我有两个模特：
class Studio(models.Model):
name = models.CharField("Studio", max_length=30, unique=True)
class Film(models.Model):
studio = models.ForeignKey(Studio, verbose_name="Studio")
name = models.CharField("Film Name", max_length=30, unique=True)我有一个电影表单，允许用户选择一个预先存在的工作室，或者键入一个新的工作室(在先前的问题的帮助下)
class FilmForm(forms.ModelForm):
required_css_class = 'required'
studio = forms.ModelChoiceField(Studio.objects, required=False, widget = SelectWithPlus)
new_studio = forms.CharField(max_length=30, required=False, label = "New Studio Name", widget = DeSelectWithX(attrs={'class' : 'hidden_studio_field'}))
def __init__(self, *args, **kwargs):
super(FilmForm, self).__init__(*args,**kwargs)
self.fields['studio'].required = False
def clean(self):
cleaned_data = self.cleaned_data
studio = cleaned_data.get('studio')
new_studio = cleaned_data.get('new_studio')
if not studio and not new_studio:
raise forms.ValidationError("Must specify either Studio or New Studio!")
elif not studio:
studio, created = Studio.objects.get_or_create(name = new_studio)
self.cleaned_data['studio'] = studio
return super(FilmForm,self).clean()
class Meta:
model = Film现在，我的第一个问题是，当studio和new_studio都缺少时，我得到了一个django ValueError:无法赋值：" Film.studio“不允许空值错误。我以为我捕获了所有的错误，因此django永远不应该知道Film.studio是空的。
第二个问题是操作顺序。如果我只想在确定其余的是有效的(从而防止在完整的电影条目通过之前保存一堆工作室名称)保存new_studio怎么办？是空的，还是因为new_ FilmForm被保存在表单的清理中而冒着过早保存的风险？
编辑:添加 回溯 并编辑验证if-语句
回答 2
Stack Overflow用户
回答已采纳
发布于 2012-01-26 00:49:44
从studio和new_studio中删除cleaned_data。
if not studio and not new_studio:
del cleaned_data['studio'], cleaned_data['new_studio']
raise forms.ValidationError("Must specify either Studio or New Studio!")Stack Overflow用户
发布于 2012-01-26 03:27:59
关于防止预制滥调new_studio：
新的def清洁(自我)：cleaned_data = self.cleaned_data studio = cleaned_data.get('studio') new_studio = cleaned_data.get('new_studio')
if not studio and not new_studio:
del cleaned_data['studio'], cleaned_data['new_studio']
raise forms.ValidationError("Must specify either Studio or New Studio!")
elif not studio:
del cleaned_data['studio']
return super(FilmForm,self).clean()并认为：
def testone(request):
if request.method == 'POST': # If the form has been submitted...
form = FilmForm(request.POST) # A form bound to the POST data
if form.is_valid(): # All validation rules pass
if form.cleaned_data['new_studio']:
studio, created = Studio.objects.get_or_create(name = form.cleaned_data['new_studio'])
new_film = form.save(commit=False)
new_film.studio = studio
else:
new_film = form
new_film.save()
return HttpResponseRedirect('/') # Redirect after POST
else:
form = FilmForm() # An unbound form
return render_to_response('testone.html', {
'form': form
}, context_instance=RequestContext(request))页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/9010852
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