python - Django 正则表达式验证器不工作 - 错误 500 部署服务器

Question

看下面的例子:

class ProjectForm(forms.Form):
    client = forms.CharField(widget=forms.TextInput(attrs={'placeholder': 'Client Name (lowercase)'}),validators=[RegexValidator(r'^[a-z]+$', 'Enter a valid client name (only lowercase letters)')])
    stage = forms.ChoiceField(choices=TYPES)
    folder = forms.ChoiceField(choices=FOLDERS, required=False, label='')
    purpose = forms.CharField(widget=forms.TextInput(attrs={'placeholder': 'Project Purpose (lowercase; digit optional)'}),validators=[RegexValidator(r'^[a-z-]+[1-9]?$', 'Enter a valid purpose (only lowercase letters, with a single optional digit)')])
    computeapi = forms.BooleanField(required=True, initial=True, label='Compute Engine')
    deploymentmanapi = forms.BooleanField(required=False, label='Deployment Manager')
    storagecompapi = forms.BooleanField(required=False, label='Storage Components')
    monitorapi = forms.BooleanField(required=False, label='Monitoring')
    loggingapi = forms.BooleanField(required=False, label='Logging')

    def clean(self):
        form_data = self.cleaned_data
        projectname = form_data['client'] + "-" + form_data['stage'] + "-" + form_data['purpose']
        client = form_data['client']
        purpose = form_data['purpose']
        for projectdict in projectdicts:
            if projectname == projectdict['name']:
                raise ValidationError(projectname + " already exists! Please try another name.")
        
        if not re.match("^[a-z-]+[1-9]?$", purpose):
            raise ValidationError(purpose + " does not comply with the Regex parameters.")
        
        if not re.match("^[a-z]+$", client):
            raise ValidationError(client + " does not comply with the Regex parameters.")
        return form_data

项目名称的 ValidationError 按预期工作得很好。但是，它不适用于 Regex，而是不断抛出 500 错误。我们是否需要专门做一些事情来让 RegexValidator 在类变量中按预期工作？我不认为需要额外的干净代码(如果需要，它就无法正常工作)。

如有任何帮助，我们将不胜感激。

编辑 2020 年 8 月 28 日:根据要求回溯:

Traceback (most recent call last):
  File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\user\OneDrive - Company\GCP App Engine\Test-Django-Terraform-Deployments - Copy\webscripts\views.py", line 30, in projectcreation
    if form.is_valid():
  File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\forms\forms.py", line 185, in is_valid
    return self.is_bound and not self.errors
  File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\forms\forms.py", line 180, in errors
    self.full_clean()
  File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\forms\forms.py", line 382, in full_clean
    self._clean_form()
  File "C:\Users\user\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\forms\forms.py", line 409, in _clean_form
    cleaned_data = self.clean()
  File "C:\Users\user\OneDrive - Company\GCP App Engine\Test-Django-Terraform-Deployments - Copy\webscripts\projectform.py", line 90, in clean
    projectname = form_data['client'] + "-" + form_data['stage'] + "-" + form_data['purpose']
KeyError: 'client'

projectdicts 字典是根据对 Google Cloud 的 GET 请求生成的全局变量，用于生成所有项目的名称列表:

try:
    global projectdicts
    projectdicts = cloudresmanv1.projects().list().execute()
    projectdicts = projectdicts.get('projects')
except Exception as e:
    logging.error(e)

Answer 1

您没有调用父类(super class)的 clean，因此您的 form.clean_data 为空

def clean(self):
    form_data = super(ProjectForm, self).clean()
    projectname = form_data['client'] + "-" + form_data['stage'] + "-" + form_data['purpose']
    client = form_data['client']
    purpose = form_data['purpose']
    for projectdict in projectdicts:
        if projectname == projectdict['name']:
            raise ValidationError(projectname + " already exists! Please try another name.")
    
    if not re.match("^[a-z-]+[1-9]?$", purpose):
        raise ValidationError(purpose + " does not comply with the Regex parameters.")
    
    if not re.match("^[a-z]+$", client):
        raise ValidationError(client + " does not comply with the Regex parameters.")
    return form_data