最后我选择在同一个视图中处理多个表单，一个用于访问者详细信息的访客模型表单，然后是每个目的地的自定义表单列表。
在同一个视图中处理多个表单非常简单（至少在这种情况下，没有跨字段验证问题）。
我仍然很惊讶没有内置支持与中间模型的多对多关系，并且在网络上环顾四周，我发现没有直接引用它。我会发布代码以防它对任何人有帮助。
首先是自定义表单：
class VisitorForm(ModelForm):
class Meta:
model = Visitor
exclude = ['destinations']
class VisitorDestinationForm(Form):
visited = forms.BooleanField(required=False)
activities = forms.MultipleChoiceField(choices = [(obj.pk, obj.name) for obj in Activity.objects.all()], required=False,
widget = CheckboxSelectMultipleInline(attrs={'style' : 'display:inline'}))
def __init__(self, visitor, destination, visited, *args, **kwargs):
super(VisitorDestinationForm, self).__init__(*args, **kwargs)
self.destination = destination
self.fields['visited'].initial = visited
self.fields['visited'].label= destination.destination
# load initial choices for activities
activities_initial = []
try:
visitorDestination_entry = VisitorDestination.objects.get(visitor=visitor, destination=destination)
activities = visitorDestination_entry.activities.all()
for activity in Activity.objects.all():
if activity in activities:
activities_initial.append(activity.pk)
except VisitorDestination.DoesNotExist:
pass
self.fields['activities'].initial = activities_initial
我通过传递 Visitor 和 Destination 对象（以及为方便起见在外部计算的“已访问”标志）来自定义每个表单
我使用布尔字段来允许用户选择每个目的地。该字段称为“已访问”，但是我将标签设置为目标，以便很好地显示。
活动由通常的 MultipleChoiceField 处理（我使用自定义小部件让复选框显示在表格上，非常简单，但如果有人需要，可以发布它）
然后查看代码：
def edit_visitor(request, pk):
visitor_obj = Visitor.objects.get(pk=pk)
visitorDestinations = visitor_obj.destinations.all()
if request.method == 'POST':
visitorForm = VisitorForm(request.POST, instance=visitor_obj)
# set up the visitor destination forms
destinationForms = []
for destination in Destination.objects.all():
visited = destination in visitorDestinations
destinationForms.append(VisitorDestinationForm(visitor_obj, destination, visited, request.POST, prefix=destination.destination))
if visitorForm.is_valid() and all([form.is_valid() for form in destinationForms]):
visitor_obj = visitorForm.save()
# clear any existing entries,
visitor_obj.destinations.clear()
for form in destinationForms:
if form.cleaned_data['visited']:
visitorDestination_entry = VisitorDestination(visitor = visitor_obj, destination=form.destination)
visitorDestination_entry.save()
for activity_pk in form.cleaned_data['activities']:
activity = Activity.objects.get(pk=activity_pk)
visitorDestination_entry.activities.add(activity)
print 'activities: %s' % visitorDestination_entry.activities.all()
visitorDestination_entry.save()
success_url = reverse('visitor_detail', kwargs={'pk' : visitor_obj.pk})
return HttpResponseRedirect(success_url)
else:
visitorForm = VisitorForm(instance=visitor_obj)
# set up the visitor destination forms
destinationForms = []
for destination in Destination.objects.all():
visited = destination in visitorDestinations
destinationForms.append(VisitorDestinationForm(visitor_obj, destination, visited, prefix=destination.destination))
return render_to_response('testapp/edit_visitor.html', {'form': visitorForm, 'destinationForms' : destinationForms, 'visitor' : visitor_obj}, context_instance= RequestContext(request))
我只是将我的目标表单收集在一个列表中，然后将此列表传递给我的模板，以便它可以遍历它们并显示它们。只要您不要忘记在构造函数中为每个前缀传递不同的前缀，它就可以正常工作
如果有人有更简洁的方法，我会将这个问题留几天。
谢谢！