Question

我正在尝试从Photographer模型中获取值的字典以显示在我的表单中。之后，用户将选择Photographer，提交表单（以及其他信息），并使用A作为属性创建模型Photographer的实例。虽然我理解ModelForms可以更友好，但在这种情况下我必须使用BaseForm：

@login_required
def create_in(request, slug):
    element = get_object_or_404(Element, slug=slug)
    a = A.objects.create(element=element, user=request.user)
    a.save()
    return redirect('CreationEditView', pk=a.pk)

urlconf将用户发送到create_in,，其中用户选择element，然后重定向到CreationEditView,，class EditView(BaseUpdateView): model = A form_class = AForm context_object_name = 'a' page = 'edit.html' def get_element(self): return self.object.element def render_to_response(self, context, **response_kwargs): element = self.get_element() return render_page(self.request, element, self.page, context) def get_success_url(self): return reverse('view_all') def get_context_data(self, **kwargs): context = super(EditView, self).get_context_data(**kwargs) return context def get_queryset(self): qs = super(EditView, self).get_queryset() return qs.filter(active=True, user=self.request.user) def get(self, request, *args, **kwargs): self.object = self.get_object() return super(EditView, self).get(request, *args, **kwargs) def post(self, request, *args, **kwargs): self.object = self.get_object() return super(EditView, self).post(request, *args, **kwargs) @method_decorator(login_required) def dispatch(self, request, *args, **kwargs): return super(EditView, self).dispatch(request, *args, **kwargs) class CreationEditView(EditView): def get_queryset(self): qs = super(EditView, self).get_queryset() return qs.filter(active=False, user=self.request.user) def get_success_url(self): return reverse('create_finished', kwargs=dict(pk=self.object.pk)) def get_context_data(self, **kwargs): context = super(CreationEditView, self).get_context_data(**kwargs) context['create'] = True return context使用来自Django Generic Views的BaseUpdateView操纵对象：

render_page

然后通过def render_page(request, element, page, context): template_name = element_template_name(element, page) try: template = get_template(template_name) except TemplateDoesNotExist: template = get_template('template_location/%s' % page) context = RequestContext(request, context) return HttpResponse(template.render(context))呈现页面，如下所示：

class Photographer(models.Model):
    name = models.CharField(max_length=20)
    models = models.ManyToManyField('Model')

class Model(models.Model):
    model = models.CharField(max_length=20, blank=False)
    series = models.ForeignKey('Series', null=True, blank=True)

class A(models.Model):
    user = models.ForeignKey(User)
    photographer = models.ForeignKey('Photographer', blank=True, null=True)
    model = models.ForeignKey('Model', blank=True, null=True)

如果我的模型如下：

Photographer

您如何将class AForm(BaseForm): def __init__(self, data=None, files=None, instance=None, auto_id='id_%s', prefix=None, initial=None, error_class=ErrorList, label_suffix=':', empty_permitted=False): if not instance: raise NotImplementedError("Instance must be provided") self.instance = instance object_data = self.instance.fields_dict() self.declared_fields = SortedDict() self.base_fields = fields_for_a(self.instance) # if initial was provided, it should override the values from instance if initial is not None: object_data.update(initial) BaseForm.__init__(self, data, files, auto_id, prefix, object_data, error_class, label_suffix, empty_permitted) cleaned_data = self.cleaned_data # save fieldvalues for self.instance fields = field_list(self.instance) for field in fields: if field.enable_wysiwyg: value = unicode(strip(cleaned_data[field.name])) else: value = unicode(cleaned_data[field.name]) return self.instance中的值正确地集成到视图代码中以便稍后在模板中使用？这些值将成为用户将从中选择的下拉表单的一部分。用法示例非常有用。

感谢任何想法。

编辑（添加表格）

{{1}}

Answer 1

我认为你缺少Django编程的基本方面，即Django形式。您应该创建一个表单，如：

class AForm(forms.Form):
    model = forms.ModelChoiceField(queryset=Model.objects.all())
    photographer = forms.ModelChoiceField(queryset=Photographer.objects.all())

    class Meta:
        model = A
        fields = ('model', 'photographer', )

然后您的创建视图将类似于：

@login_required
def create_in(request, slug):
    if request.method == 'POST':
        form = AForm(request.POST)
        if form.is_valid():
            instance = form.save(commit=False)
            instance.user = request.user
            return HttpResponseRedirect("/somewhere/")
    else:
        form = AForm()
    return render_to_response('create_in.html', { 'form': form }, context_instance=context)

很难弄清楚你要做什么，我认为你变得过于棘手，因为我从来没有需要扩展BaseForm，而且我已经在选择上使用特殊过滤器做了很多表格。通常这些都是这样的：

class AForm(forms.Form): 
   def __init__(self, profile, *args, **kwargs):
       super(AForm, self).__init__(*args, **kwargs)
       self.fields['photographer'].queryset = models.Photographer.objects.filter(profilephotographer__profile=profile)

向复杂Django视图添加值

1 个答案: