Python Django表单验证错误未显示在模板中

我的问题与问题所述完全相同……我无法使表单验证错误正常工作。我将在下面发布我目前正在尝试的内容。请让我知道如何修改我的代码，以使这项工作。目前，我甚至可以用任何名字成功提交表单。所以很明显，我在forms.py中设置的内容甚至不起作用

forms.py

class PackingListForm(forms.ModelForm):
    class Meta:
        model = PackingList
        fields = ['Exporter', 'Consignee', 'Reference_Number', ... ]

    def clean_test_value(self):
        data = self.cleaned_data.get('Exporter')

        if not Exporter == 'Jeff':
            raise forms.ValidationError('ahhhh Error!')
        return data

模板（packlist.html）

回溯

Request Method: POST
Request URL: http://127.0.0.1:8000/create/packing_list

Django Version: 1.11
Python Version: 2.7.10
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'Poseidon',
 'crispy_forms',
 'bootstrap_modal_forms']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "/Library/Python/2.7/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/Library/Python/2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  23.                 return view_func(request, *args, **kwargs)

File "/Users/andrews/Desktop/WBU2/Poseidon/views.py" in PackingListView
  188.         if form.is_valid():

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in is_valid
  183.         return self.is_bound and not self.errors

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in errors
  175.             self.full_clean()

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in full_clean
  384.         self._clean_fields()

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in _clean_fields
  405.                     value = getattr(self, 'clean_%s' % name)()

File "/Users/andrews/Desktop/WBU2/Poseidon/forms.py" in clean_Exporter
  52.         if not Exporter == 'Greg':

Exception Type: NameError at /create/packing_list
Exception Value: global name 'Exporter' is not defined

---

由于该字段的名称为

导出器

，因此清理功能应为

clean\u Exporter

：

class PackingListForm(forms.ModelForm):
    class Meta:
        model = PackingList
        fields = ['Exporter', 'Consignee', 'Reference_Number']

    def clean_Exporter(self):
        data = self.cleaned_data.get('Exporter')

        if data != 'Jeff':
            raise forms.ValidationError('ahhhh Error!')
        return data

class PackingListForm（forms.ModelForm）：
类元：
型号=包装清单
字段=[“出口商”、“收货人”、“参考号”]
def清洁_导出器（自身）：
data=self.cleanned\u data.get（'Exporter'））
如果数据！='杰夫：
raise forms.ValidationError（'ahhhh Error！'）
返回数据

注意：通常Django模型中字段的名称是用snake_大小写的，而不是PerlCase，因此它应该是：

exporter

，而不是

exporter

---

验证器应该是

clean\u Exporter

@brunodesshuilliers是的，谢谢您的输入。非常有用。问题已经得到了回答。@GXM100学习阅读回溯和错误消息确实会对您有所帮助。您好，威廉-这很有帮助，但现在我发现在我看来遗漏了一些东西，因为我在提交表单时立即收到一个名称错误，声明“未定义全局名称导出器”。我已经发布了上面的回溯。@GXM100:是的，应该是

非数据==

，非

非导出器==

，因为您没有定义该变量：）@GXM100:您也可以使用

数据！='杰夫

哪个短一点。谢谢！现在一切似乎都在运行…相对容易的事情，但被忽略了，因为我是新手…感谢你的帮助。

Request Method: POST
Request URL: http://127.0.0.1:8000/create/packing_list

Django Version: 1.11
Python Version: 2.7.10
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'Poseidon',
 'crispy_forms',
 'bootstrap_modal_forms']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "/Library/Python/2.7/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/Library/Python/2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  23.                 return view_func(request, *args, **kwargs)

File "/Users/andrews/Desktop/WBU2/Poseidon/views.py" in PackingListView
  188.         if form.is_valid():

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in is_valid
  183.         return self.is_bound and not self.errors

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in errors
  175.             self.full_clean()

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in full_clean
  384.         self._clean_fields()

File "/Library/Python/2.7/site-packages/django/forms/forms.py" in _clean_fields
  405.                     value = getattr(self, 'clean_%s' % name)()

File "/Users/andrews/Desktop/WBU2/Poseidon/forms.py" in clean_Exporter
  52.         if not Exporter == 'Greg':

Exception Type: NameError at /create/packing_list
Exception Value: global name 'Exporter' is not defined

class PackingListForm(forms.ModelForm):
    class Meta:
        model = PackingList
        fields = ['Exporter', 'Consignee', 'Reference_Number']

    def clean_Exporter(self):
        data = self.cleaned_data.get('Exporter')

        if data != 'Jeff':
            raise forms.ValidationError('ahhhh Error!')
        return data