我对 django 表单有一个非常奇怪的问题，我显示了一个包含附加表单集的表单，以便用户也可以同时提交外键关系的数据。
模板始终为原始模型显示一个表格，为第二个模型显示一个表格。
我现在想提交这两个表格，而不在第二个表格中填写任何内容。在第一次提交时，第二个表单不验证并重新显示页面，但在第二次提交时，第二个表单是有效的！即使如此，POST 数据也是相同的。这怎么可能？
或者我做错了，你怎么能辨别用户是否没有在表单集中填写任何内容，或者他是否填写了无效的内容？
这里的模型：
class Software(models.Model):
creation_date = models.DateTimeField(default=datetime.now)
creator = models.ForeignKey(User)
version = models.CharField(max_length=300, unique=True, editable=False)
major_version = models.IntegerField()
minor_version = models.IntegerField()
[...]
def save(self, **kwargs):
"""
This updates the version string to the combined representation.
"""
self.version = Software.combine_version_string (self.major_version, self.minor_version)
super(Software, self).save(**kwargs)
class SoftwarePatch(models.Model):
file = models.FileField(upload_to='software_patches')
file_name = models.CharField(max_length=255, editable=False)
file_date = models.DateTimeField(default=datetime.now)
upload_date = models.DateTimeField(default=datetime.now)
software = models.ForeignKey('Software', related_name='patches')
firmware_patch = models.BooleanField(default=True)
target_path = models.CharField(max_length=255, blank=True)
class Meta:
unique_together = ('software', 'file_name')
verbose_name_plural = "software patches"
def __unicode__(self):
return self.file_name
def clean(self):
if self.file and not self.file_name:
self.file_name = self.file.file.name
这是我的表格：
SoftwarePatchFormSet = inlineformset_factory(Software,
SoftwarePatch,
extra=1)
class SoftwareForm(forms.ModelForm):
"""
A simple form for creating a new software.
"""
class Meta:
model = Software
最后是我的视图功能：
def software_add(request, software_id=None):
if software_id == None:
software = Software()
else:
software = Software.objects.get(id=software_id)
if request.POST:
form = SoftwareForm(request.POST, instance=software)
if form.is_valid():
software = form.save(commit=False)
softwarepatch_formset = SoftwarePatchFormSet(request.POST, request.FILES, instance=software)
if softwarepatch_formset.is_valid():
software = form.save()
softwarepatch_formset.save()
# Redirect, in case of a popup close it
if request.POST.has_key("_popup"):
pk_value = software._get_pk_val()
return HttpResponse('<script type="text/javascript">opener.dismissAddAnotherPopup(window, "%s", "%s");</script>' % \
# escape() calls force_unicode.
(escape(pk_value), escape(software)))
if 'next' in request.POST:
return HttpResponseRedirect(request.POST['next'])
else:
return HttpResponseRedirect(reverse('index'))
else:
form = SoftwareForm(instance=software)
softwarepatch_formset = SoftwarePatchFormSet(instance=software)
is_popup = request.GET.has_key("_popup") or request.POST.has_key("_popup")
return render_to_response(
'main/software_edit.html',
{'form': form,
'softwarepatch_formset': softwarepatch_formset,
'add': True,
'is_popup': is_popup,
},
context_instance = RequestContext(request)
)