如果用户提交表单,我试图将ManyToMany字段保存到我的数据库。当用户提交表单时,我可以看到数据库中的非M2M字段,但即使选择M2M字段,它们也不会显示。我一直在搜索很多东西并看到有关m2m_save()函数的一些事情,但无法弄明白。任何帮助是极大的赞赏! (我一直在寻找,所以我希望我不要重复这个问题!)
# models.py
class Contact(models.Model):
first_name = models.CharField(max_length=30)
last_name = models.CharField(max_length=30)
contactinfo = models.ForeignKey(ContactInfo)
location = models.ForeignKey(Location, null=True, blank=True)
work = models.ManyToManyField(Work, null=True, blank=True)
skills = models.ManyToManyField(Skills, null=True, blank=True)
contactgroup = models.ManyToManyField(ContactGroup, null=True, blank=True)
timestamp = models.DateTimeField(auto_now_add=True)
def __unicode__(self):
return u'%s %s' % (self.first_name, self.last_name)
class Meta:
ordering = ["first_name",]
#forms.py
class ContactForm(forms.ModelForm):
class Meta:
model = Contact
#exclude = ('work', 'skills', 'contactgroup')
first_name = forms.TextInput(),
last_name = forms.TextInput(),
contactinfo = forms.ModelChoiceField(queryset=ContactInfo.objects.all()),
location = forms.ModelChoiceField(queryset=Location.objects.all()),
work = forms.ModelMultipleChoiceField(queryset=Work.objects.all()),
skills = forms.ModelMultipleChoiceField(queryset=Skills.objects.all()),
contactgroup = forms.ModelMultipleChoiceField(queryset=ContactGroup.objects.all()),
widgets = {
'first_name': forms.TextInput(attrs={'placeholder': 'First'}),
'last_name': forms.TextInput(attrs={'placeholder': 'Last'}),
}
# views.py
def apphome(request):
if not request.user.is_authenticated():
return HttpResponseRedirect('/')
form1 = ContactForm(request.POST or None)
if form1.is_valid():
new_contact = form1.save(commit=False)
new_contact.save()
new_contact.save_m2m()
return HttpResponseRedirect("/app")
return render_to_response("apphome.html", locals(), context_instance=RequestContext(request))
当我运行时,我会收到:
AttributeError at /app/
'Contact' object has no attribute 'save_m2m'
答案 0 :(得分:0)
save_m2m
是表单上的方法,而不是new_contact
(模型的实例)。
但是如果您错过commit=False
表单保存,则根本不需要调用它。使用save_m2m
的唯一原因是当您使用commit=False
时,如果要在正确保存之前设置任何实例字段,则需要执行此操作。如果您不想这样做,请直接执行form1.save()
,然后无需拨打new_contact.save()
或save_m2m()
。