Django AttributeError：表单对象没有属性'_errors'

我在我的表单中覆盖了init方法，现在返回错误'TransactionForm'对象没有属性'_errors' .

我希望这可以工作，因为我已经在我的_1073519中包含了超级，但是也许我不明白如何正确使用它 . 一个解释将不胜感激 . 我需要做些什么来使form.errors工作？

完全追溯

回溯：文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ core \ handlers \ exception.py”在内部35. response = get_response（request）文件“C：\ Program Files \ Python36 \ lib _ site_ packages \ django \ core \ handlers \ base.py“in _get_response 128. response = self.process_exception_by_middleware（e，request）File”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ core \ handlers \ base.py“in _get_response 126. response = wrapped_callback（request，* callback_args，** callback_kwargs）add_transaction 136中的文件”C：\ py \ portfolio-project \ myportfolio \ views.py“ . 返回渲染（请求，'myportfolio /add_transaction.html'，{'form'：form}）文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ shortcuts.py”在render 36. content = loader.render_to_string（template_name，context，请求，使用= using）文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ loader.py”在render_to_string 62中 . 返回template.render（context，request）文件“C：\ Program Files \ Python36 \ LIB \站点包\ Django的\ TEMPL在渲染中返回\ backends \ _django.py“ . 在渲染175中返回self.template.render（context）文件”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base.py“ . self._render（context）在_render 167.文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base.py”中返回self.nodelist.render（context）文件“C：\ Program Files渲染943中的\ Python36 \ lib \ site-packages \ django \ template \ base.py“ . bit = node.render_annotated（context）文件”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base在render_annotated 910中的.py“ . 返回self.render（上下文）文件”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ loader_tags.py“在渲染155中 . 返回compiled_parent._render（context）文件_render 167.中的“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base.py”返回self.nodelist.render（context）文件“C：\ Program Files \ Python36 \ lib \ site- packages \ django \ template \ base.py“in render 943. bit = node.render_annotated（context）File”C：\ Program Files \ Python36在render_annotated 910中的\ lib \ site-packages \ django \ template \ base.py“ . 返回self.render（上下文）文件”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ loader_tags.py“在渲染155.返回compiled_parent._render（context）文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base.py”in _render 167. return self.nodelist.render（context）File“渲染943中的C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base.py“ . bit = node.render_annotated（context）文件”C：\ Program Files \ Python36 \ lib \ site-packages \在render_annotated 910中的django \ template \ base.py“ . 返回self.render（上下文）文件”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ loader_tags.py“在渲染67中 . 结果=块.nodelist.render（context）文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base.py”在渲染943中.bit = node.render_annotated（context）文件“C：\ Program Files在render_annotated 910中的\ Python36 \ lib \ site-packages \ django \ template \ base.py“ . 返回self.render（c文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ template \ base.py”在渲染999中 . 返回render_value_in_context（输出，上下文）文件“C：\ Program Files \ Python36 \ lib \ site -packages \ django \ template \ base.py“in render_value_in_context 978.value = str（value）文件”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ utils \ html.py“in 371. klass . str = lambda self：mark_safe（klass_str（self））str 136中的文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ forms \ forms.py” . 返回self.as_table（）文件“C： \ program Files \ Python36 \ lib \ site-packages \ django \ forms \ forms.py“in as_table 279. errors_on_separate_row = False）文件”C：\ Program Files \ Python36 \ lib \ site-packages \ django \ forms \ forms . py“in _html_output 196. top_errors = self.non_field_errors（）＃应在所有字段上方显示的错误 . 在non_field_errors 305中输入文件“C：\ Program Files \ Python36 \ lib \ site-packages \ django \ forms \ forms.py” . 返回self.errors.get（NON_FIELD_ERRORS，self.error_class（error_class ='nonfield'））File“ C：\ PROGRAM文件\ Python36 \ lib \ site-packages \ django \ forms \ forms.py“错误173.如果self._errors为None：Exception Type：AttributeError at / myportfolio / add_transaction / Exception Value：'TransactionForm'对象没有属性' _errors'

形式

class TransactionForm(forms.ModelForm):     
    CHOICES = ((1, 'Buy'), (2, 'Sell'),)

    coin = forms.ModelChoiceField(queryset = Coin.objects.all()) 
    buysell = forms.ChoiceField(choices = CHOICES)

    field_order = ['buysell', 'coin', 'amount', 'trade_price']

    class Meta:
        model = Transactions
        fields = {'buysell', 'coin', 'amount', 'trade_price'}

    def __init__(self, coin_price = None, user = None, *args, **kwargs):

        if user:
            self.user = user
            qs_coin = Portfolio.objects.filter(user = self.user).values('coin').distinct()
            super(TransactionForm, self).__init__(self.user, *args, **kwargs)
            self.fields['coin'].queryset = qs_coin

        if coin_price:
            self.coin_price = coin_price
            super(TransactionForm, self).__init__(self.user, self.coin_price, *args, **kwargs)
            self.fields['price'] = self.coin_price

查看

def add_transaction(request):
    print(request.method)
    print("test1")

    print(request.GET)

    if request.method == "GET":
        if request.is_ajax():
            print("ajax test")

            data = {
                'test': "test1"
            }

            form = TransactionForm(request.GET, user = request.user, coin_price = GetCoin("Bitcoin").price)

            return JsonResponse(data)


    form = TransactionForm()
    if request.method == "POST":
        print("test2")
        form = TransactionForm(request.POST)
        if form.is_valid():
            print("test3")
            obj = form.save(commit = False)
            obj.user = request.user
            obj.save()
            return HttpResponseRedirect('/myportfolio/')
        else: 
            print(form.errors)

    return render(request, 'myportfolio/add_transaction.html', {'form': form})