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我爲我的一個項目使用了django書籤，並且最近更新到了Django 1.2.1。我注意到表單提交自更新以後不驗證。請注意，我確認這是與Django v1.1.1一起工作，所以新版本和表單字段驗證是不同的。v1.2.1中的Django表單驗證
這是的forms.py正在建設關的模式：
class BookmarkInstance(models.Model):
bookmark = models.ForeignKey(Bookmark, related_name="saved_instances", verbose_name=_('bookmark'))
user = models.ForeignKey(User, related_name="saved_bookmarks", verbose_name=_('user'))
saved = models.DateTimeField(_('saved'), default=datetime.now)
description = models.CharField(_('description'), max_length=100)
note = models.TextField(_('note'), blank=True)
處理POST的觀點：
if request.method == "POST":
bookmark_form = BookmarkInstanceForm(request.user, request.POST)
if bookmark_form.is_valid():
bookmark_instance = bookmark_form.save(commit=False)
bookmark_instance.user = request.user
bookmark_instance.save()
bookmark = bookmark_instance.bookmark
...
而且forms.py：
class BookmarkInstanceForm(forms.ModelForm):
url = forms.URLField(label = "URL", verify_exists=True, widget=forms.TextInput(attrs={"size": 40}))
description = forms.CharField(max_length=100, widget=forms.TextInput(attrs={"size": 40}))
redirect = forms.BooleanField(label="Redirect", required=False)
tags = TagField(label="Tags", required=False)
def __init__(self, user=None, *args, **kwargs):
self.user = user
super(BookmarkInstanceForm, self).__init__(*args, **kwargs)
# hack to order fields
self.fields.keyOrder = ['url', 'description', 'note', 'redirect']
def clean(self):
if 'url' not in self.cleaned_data:
return
if BookmarkInstance.objects.filter(bookmark__url=self.cleaned_data['url'], user=self.user).count() > 0:
raise forms.ValidationError(_("You have already bookmarked this link."))
return self.cleaned_data
...
def save(self, commit=True):
self.instance.url = self.cleaned_data['url']
return super(BookmarkInstanceForm, self).save(commit)
class Meta:
model = BookmarkInstance
#fields = ('url', 'description', 'note', 'redirect')
使用pdb，我看到BookmarkInstance的外鍵值爲空，因此is_valid（）將返回false，因爲所有字段沒有驗證。
init函數是否需要修改以顯式傳遞外鍵參數？不應該像V1.1.1中那樣自動傳入外鍵值？