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任何帮助将不胜感激，因为我正在用这个拔头发！我有一个通过repair_id 和part_id 发送到ModelForm 的Formview。ModelForm 将此数据作为 ModelChoiceField 拉取一组值的输入。为了连接标签中的两列，我将 ModelChoiceField 子类化为 PartMatModelChoiceField。这一切似乎都工作正常，但每次我提交表单时，事情都不会提交为有效。

如果我查看 html 输出，表单值/标签会正确显示。如果我从 ModelChoiceField 中获取其中一个值并通过 shell 提交表单，则显示为有效且没有错误。

经过一段时间的测试，我可以看到问题出在 part_mat_nr 字段上。

如果我将它切换回 ModelChoiceField （无子类）我有同样的问题如果我将查询集简化为 PrdTtBom.objects.filter(item_no__iexact=part_id) 我有同样的问题如果我将简化查询集中的变量 part_id 替换为part_id 是静态设置的。有用。

该变量正在通过，因为它正在正确构建列表，因此不确定发生了什么。

Model.py（相关字段）

part_mat_nr = models.CharField(db_column='Part_Mat_Nr', max_length=255, verbose_name='Part Number')

表格.py

class RepairPartsTestForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        key = kwargs.pop('pknum', None)
        part_id = kwargs.pop('part_id', None)
        repair_id = kwargs.pop('repair_id', None)
        total = kwargs.pop('total', None)
        itembom = PrdTtBom.objects.filter(item_no__iexact=part_id).values('comp_item_no')

        super(RepairPartsTestForm, self).__init__(*args, **kwargs)
        self.fields['part_mat_nr'] = PartMatModelChoiceField(queryset=PrdTtCostsSqdx.objects.filter(matnr__in=itembom), to_field_name='matnr', label='Select Related Part Number', required=False)
        self.fields['failcode'] = FailCodeModelChoiceField(queryset=Failcodes.objects.all(), label='Fail Code')
        self.fields['repaired_fg'] = forms.ChoiceField(choices=((0, 'No'), (1, 'Yes')), label='Repaired:')
        self.fields['faildesc'].widget = forms.HiddenInput()
        self.fields['part_mat_desc'].widget = forms.HiddenInput()
        self.fields['repairno'].widget = forms.HiddenInput()
        self.fields['repairno'].initial = repair_id
        self.fields['part_id'] = forms.CharField(initial=part_id, required=False, widget=forms.HiddenInput())
        self.fields['repair_id'] = forms.CharField(initial=repair_id, required=False, widget=forms.HiddenInput())
        self.fields['total'] = forms.CharField(initial=total, required=False, widget=forms.HiddenInput())
        self.fields['key'] = forms.CharField(initial=key, required=False, widget=forms.HiddenInput())

    def clean(self):
        failcode = self.cleaned_data.get('failcode')
        if failcode:
            faildesc = Failcodes.objects.values_list('problem_desc', flat=True).get(problem_code=failcode)
        else:
            faildesc = None
        self.cleaned_data['faildesc'] = faildesc

        return self.cleaned_data

    class Meta:
        model = Repairparts
        fields = '__all__'

视图.py

class RepairPartsCreate(LoginRequiredMixin, GroupRequiredMixin, FormView):
    title = 'Repair Parts: Create'
    model = Repairparts
    group_required = [u'AD_Group']
    template_name = 'post_form.html'
    success_url = 'user_rcf:summary'
    form_class = RepairPartsForm
    success_msg = 'Part Created Successfully!'

    def get_context_data(self, **kwargs):
        context = super(RepairPartsCreate, self).get_context_data(**kwargs)
        context['title'] = self.title
        return context

    def post(self, request, *args, **kwargs):
        context = super(RepairPartsCreate, self).get_context_data(**kwargs)
        form = self.form_class(request.POST)
        if form.is_valid():
            data = form.cleaned_data
            repair_id = data['repairno']
            finalcharge = data['finalcharge']
            Deliveryser.objects.filter(repairno__iexact=repair_id).update(finalcharge=finalcharge)
            form.save(data)
            context['success'] = True
            messages.add_message(self.request, messages.SUCCESS, 'Part added successfully.')
            return redirect(self.success_url, q=repair_id)
        else:
            repair_id = request.POST['repair_id']
            part_id = request.POST['part_id']
            total = 'partadd'
            form = self.form_class(repair_id=repair_id,part_id=part_id,total=total)
            context['repair_id'] = repair_id
            context['part_id'] = part_id
            context['title'] = self.title
            context['form'] = form
            return render(request, self.template_name, context) 
        return context
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