Question

我有一个django项目，带有一个仪表板和带有django admin中构建的表单集的表单。我正在尝试从表单向API发出POST请求。我有两个特定的表单。当我在两个表单集中有多个表单时，出现以下错误。但是，正在通过一种形式。下面是我的代码和错误，

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            if (element == null) continue;
            // Removes  'mouseevent' listeners
            ((EventTarget)element).removeEventListener("mousedown", onDownAction, false);
            ((EventTarget)element).removeEventListener("mousemove", onMoveAction, false);
            ((EventTarget)element).removeEventListener("mouseup", onUpAction, false);
            ((EventTarget)element).removeEventListener("mouseout", onLeaveAction, false);

forms.py

Internal Server Error: /admin/campaign/add
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.7/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/local/lib/python3.7/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/lib/python3.7/site-packages/django/utils/decorators.py", line 142, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/django/views/decorators/cache.py", line 45, in _wrapped_view_func
    add_never_cache_headers(response)
  File "/usr/local/lib/python3.7/site-packages/django/utils/cache.py", line 252, in add_never_cache_headers
    patch_response_headers(response, cache_timeout=-1)
  File "/usr/local/lib/python3.7/site-packages/django/utils/cache.py", line 243, in patch_response_headers
    if not response.has_header('Expires'):
AttributeError: 'NoneType' object has no attribute 'has_header'

views.py

class CampaignForm(forms.Form):
    consumer = forms.CharField(label="Consumer", max_length=200)
    startDate = forms.DateTimeField(label="Start Date",
        input_formats=['%d/%m/%Y %H:%M'])
    endDate = forms.DateTimeField(label="End Date",
        input_formats=['%d/%m/%Y %H:%M'])
    referreeCredits = forms.IntegerField(label="Referree Credits")
    referrerCredits = forms.IntegerField(label="Referrer Credits")
    maxReferreeCredits = forms.IntegerField(label="Max Referree Credits")
    maxReferrerCredits = forms.IntegerField(label="Max Referrer Credits")
    message = forms.CharField(label="Message", max_length=200)
    kramerTemplateId = forms.CharField(label="Kramer Template ID", max_length=200)
    paymentMode = forms.ChoiceField(label="Payment Mode", choices=[("PAYTM","PAYTM")])

class RuleForm(forms.Form):
    eventName = forms.CharField(label="Event Name", max_length=200)
    operator = forms.ChoiceField(label="Operator", choices=[("EQUAL","EQUAL"), ("EVERY","EVERY")])
    value = forms.IntegerField(label="Value")

class MilestoneRulesForm(forms.Form):
    operator = forms.ChoiceField(label="Operator", choices=[("EQUAL","EQUAL"), ("EVERY","EVERY")])
    value = forms.IntegerField(label="Value")
    referrerCredits = forms.IntegerField(label="Referrer Credits")

HTML模板：

def campaign_add(self, request):
        form = CampaignForm()
        RuleFormSet = formset_factory(RuleForm)
        MilestoneFormSet = formset_factory(MilestoneRulesForm)
        if request.method == 'POST':
            # import ipdb; ipdb.set_trace()
            form = CampaignForm(request.POST)
            rule_formset = RuleFormSet(request.POST, prefix='rules')
            milestone_formset = MilestoneFormSet(request.POST, prefix='milestones')
            if form.is_valid() and rule_formset.is_valid() and milestone_formset.is_valid():
                    import ipdb; ipdb.set_trace()
                    dat = {}
                    dat["consumer"] = form.cleaned_data["consumer"]
                    dat["startDate"] = self.datetime_to_epoch(form.cleaned_data["startDate"])
                    dat["endDate"] = self.datetime_to_epoch(form.cleaned_data["endDate"])
                    dat["referreeCredits"] = form.cleaned_data["referreeCredits"]
                    dat["referrerCredits"] = form.cleaned_data["referrerCredits"]
                    dat["maxReferreeCredits"] = form.cleaned_data["maxReferreeCredits"]
                    dat["maxReferrerCredits"] = form.cleaned_data["maxReferrerCredits"]
                    dat["message"] = form.cleaned_data["message"]
                    dat["kramerTemplateId"] = form.cleaned_data["kramerTemplateId"]
                    dat["paymentMode"] = form.cleaned_data["paymentMode"]
                    arrRules = rule_formset.cleaned_data
                    arrMilestoneRules = milestone_formset.cleaned_data
                    dat["eventRules"] = arrRules
                    dat["milestoneRules"] = arrMilestoneRules
                    print(rule_formset.cleaned_data)
                    print(milestone_formset.cleaned_data)
                    res = requests.post("https://example.com", data=json.dumps(dat), headers={'content-type': 'application/json'})
                    if res.status_code == 201 or res.status_code == 200:
                        messages.success(request, 'Success!')
                        return redirect("admin:campaign-pg1")
                    else:
                        messages.error(request, 'Submission Failed.')
        else:
            rule_formset = RuleFormSet(prefix="rules")
            milestone_formset = MilestoneFormSet(prefix="milestones")
            return TemplateResponse(request, "admin/campaign_add.html", {"form":form, "rule_formset": rule_formset, "milestone_formset": milestone_formset})

如何解决此错误，以便我可以在表单集中使用任意数量的表单发出POST请求？

编辑：这就是我的表单集。当我有多个表格时，出现上述错误。 my formsets

Answer 1

是否正在达到条件，您的请求的状态代码无效（不是200或201）？在这种情况下，您不会返回任何响应，您只是在打电话：

else:
    messages.error(request, 'Submission Failed.')

您的异常的堆栈跟踪表明没有响应对象（您没有从视图返回任何响应）

File "/usr/local/lib/python3.7/site-packages/django/utils/cache.py", line 243, in patch_response_headers
    if not response.has_header('Expires'):
AttributeError: 'NoneType' object has no attribute 'has_header'

检查api调用失败的原因并解决问题，然后您应该能够提交表单。

Answer 2

默认情况下，formset_factory（）定义了一种额外的形式。显示的空表格数量由extra参数控制。

MilestoneFormSet = formset_factory(MilestoneForm, extra=2)
RuleFormSet = formset_factory(RuleForm, extra=2)

Django在发出POST请求时在表单集中有多个表单时抛出错误

2 个答案: