Question

在表单集验证时，ManagementForm数据丢失错误

当我尝试使用中间m2m表子formset保存父表单时出现此错误。我不知道如何解决，因为在Traceback中缺少有关此错误的信息。请帮忙！

models.py

class Material(models.Model):
    name = models.CharField(max_length=200)
    familiy = models.ForeignKey(Material_family, on_delete=models.CASCADE, null=True)
…   

class Purchase(models.Model):
    number = models.IntegerField()
    date = models.DateField()
    …

class Purchase_detail(models.Model):        
    material = models.ForeignKey(Material, on_delete=models.CASCADE)
    purchase = models.ForeignKey(Purchase, on_delete=models.CASCADE)
    quantity = models.IntegerField()
    unit_value = models.IntegerField(default=0)

forms.py

class PurchaseModelForm(forms.ModelForm):
    class Meta:
        model = Purchase
        fields = (‘number’,’date’ , ’…’)

    def __init__(self, *args, **kwargs):
        super(PurchaseModelForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_tag = False
        self.helper.form_id = 'id-purchase-form'
        self.helper.form_method = 'post'

class Purchase_detailModelForm(forms.ModelForm):
    class Meta:
        model = Purchase_detail
        fields = ('material','quantity','unit_value')

    def __init__(self, *args, **kwargs):
        super(Purchase_detailModelForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_tag = False
        self.helper.form_id = 'id-purchase-form'
        self.helper.form_method = 'post'
        self.helper.form_class = 'form-inline'
        self.helper.field_template = 'bootstrap3/layout/inline_field.html'

DetailFormSet = forms.inlineformset_factory(Purchase, Purchase_detail, form=Purchase_detailModelForm, extra=1)

views.py

def purchase_new(request, purchase_id=None, *args, **kwargs):
    template = 'erp/purchase_form.html'
    if purchase_id:
        inst = Purchase.objects.get(pk=purchase_id)
    else:
        inst = Purchase()
    if request.method == 'POST':
        form = PurchaseModelForm(request.POST or None, request.FILES, prefix='purchase', instance=inst)
        formset = DetailFormSet(request.POST or None, request.FILES, prefix='detail')
        form_valid = form.is_valid()
        if form_valid:
            purchase = form.save()
            formset.save(commit=False)
            for f in formset:
                f.compra = purchase
                f.save()
            return redirect('...')
    else:
        form = PurchaseModelForm(prefix='purchase',instance=inst)
        formset = DetailFormSet(prefix='purchase')
    context = { 'form': form, 'formset': formset }
    return render(request, template, context )

这是模板

<form method='POST' action="">
                    {% csrf_token %}
                    <div>
                        <h5 style="font-weight: bold;">Datos de la Compra</h5>
                        {% crispy form form.helper %}<hr/>
                        <h5 style="font-weight: bold;">Detalle de la Compra <a class="btn btn-rounded btn-sm btn-icon btn-default add-new-form"><i class="fa fa-plus text-success"></i></a></h5>
                    </div>
                    {{ formset.management_form|crispy }}
                    {% for x in formset %}
                    <div class="form-inline">
                        {{ x|crispy }}
                        <hr>
                    </div>
                    {% endfor %}
                    <div class="form-inline" id="empty-row">
                        {{ formset.empty_form|crispy  }}
                        <hr>    
                    </div>
                    <button class="btn btn-block btn-primary" >Guardar</button>
                </form>

追溯是：回溯：

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/core/handlers/exception.py"在内心 41. response = get_response（request）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/core/handlers/base.py"在_get_response中 187. response = self.process_exception_by_middleware（e，request）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/core/handlers/base.py"在_get_response中 185. response = wrapped_callback（request，* callback_args，** callback_kwargs）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/contrib/auth/decorators.py"在_wrapped_view中 23. return view_func（request，* args，** kwargs）

File＆＃34; /Users/jlattus/Dev/italuzbi/src/erp/views.py"在purchase_new 415. formset.save（commit = False）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/forms/models.py"在保存 666. return self.save_existing_objects（commit）+ self.save_new_objects（commit）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/forms/models.py"在save_existing_objects中 768.如果不是self.initial_forms：

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/forms/formsets.py"在initial_forms中 189. return self.forms [：self.initial_form_count（）]

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/utils/functional.py"在获取 35. res = instance。 dict [self.name] = self.func（instance）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/forms/formsets.py"在表格中 144.对于范围内的i（self.total_form_count（））]

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/forms/formsets.py"在total_form_count中 116. return min（self.management_form.cleaned_data [TOTAL_FORM_COUNT]，self.absolute_max）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/utils/functional.py"在获取 35. res = instance。 dict [self.name] = self.func（instance）

File＆＃34; /Users/jlattus/Dev/italuzbi/lib/python3.5/site-packages/django/forms/formsets.py"在management_form中 98. code =＆＃39; missing_management_form＆＃39;，

异常类型：/ compra / new /的ValidationError 例外价值：[＆＃39; Los datos de ManagementForm faltan o han sido manipulados

保存中间M2M表

0 个答案: