Django TypeError in forms.py

Question

私はPythonanywhere.comに自分のDjangoアプリケーションをデプロイしていて、ユーザーTypeError at /registration/argument 1 must be str, not listのサインアップ中にこのエラーが発生します。

私は、ユーザがすでにデータベースに提示しているかどうかを確認してから、forms.pyに検証エラーを投げます。

このコードにより、エラーが発生する可能性があります。

forms.py

class SignUpForm(forms.Form): 
    email = forms.EmailField(max_length=254, help_text='Required. Inform a valid email address.') 
    name = forms.CharField(max_length=100, required=False, help_text='Required.') 
    password = forms.CharField(max_length=1000, required=False, help_text='Required.') 
    role = forms.CharField() 

    def clean(self): 
     cleaned_data = super(SignUpForm, self).clean() 
     name = cleaned_data.get("name") 
     email = cleaned_data.get("email") 
     password = cleaned_data.get("password") 
     role = cleaned_data.get("role") 
     # validate email 
     if role == 'Author': 
      user = UserSignup.objects.filter(email=email) 
      #error suspected here-- 
      if user.first() is not None: 
       raise forms.ValidationError(
       "Email already registered. Try again.") 
     elif role == 'Publisher': 
      user = PubSignup.objects.filter(email=email) 
      if user.first() is not None: 
       raise forms.ValidationError(
       "Email already registered. Try again.") 

    class Meta: 
     model = UserSignup 
     fields = ('email', 'name', 'password') 

models.py

class UserSignup(models.Model): 
    email = models.CharField(unique=True, max_length=254) 
    name = models.CharField(max_length=100) 
    password = models.CharField(max_length=1000) 
    created_date = datetime.now() 

    class Meta: 
     app_label = 'UserSignup' 

    def __str__(self): 
     return self.email 


class PubSignup(models.Model): 
    email = models.CharField(unique=True, max_length=254) 
    name = models.CharField(max_length=100) 
    password = models.CharField(max_length=1000) 
    created_date = datetime.now() 

    class Meta: 
     app_label = 'PubSignup' 

    def __str__(self): 
     return self.email 

views.py

if form.is_valid(): 
     if form.role == "Author": 
      p = UserSignup(
       name=form.cleaned_data.get('name'), 
       email=form.cleaned_data.get('email'), 
       password=form.cleaned_data.get('password') 
      ) 
      p.save() 
      success = True 
     elif form.role == "Publisher": 
      p = PubSignup(
       name=form.cleaned_data.get('name'), 
       email=form.cleaned_data.get('email'), 
       password=form.cleaned_data.get('password') 
      ) 
      p.save() 
      success = True 

エラートレースバック

Traceback: 

File "/home/zerocod3r/lib/python3.5/site- 
packages/django/core/handlers/exception.py" in inner 
42.    response = get_response(request) 

File "/home/zerocod3r/lib/python3.5/site- 
packages/django/core/handlers/base.py" in _get_response 
187. response = self.process_exception_by_middleware(e, 
request) 

File "/home/zerocod3r/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response 
185. response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/home/zerocod3r/PublicationPlatform/mainapp/views.py" in signup_user 
26. if form.is_valid(): 

File "/home/zerocod3r/lib/python3.5/site-packages/django/forms/forms.py" in is_valid 
169. return self.is_bound and not self.errors 

File "/home/zerocod3r/lib/python3.5/site-packages/django/forms/forms.py" in errors 
161. self.full_clean() 

File "/home/zerocod3r/lib/python3.5/site-packages/django/forms/forms.py" in full_clean 
371. self._clean_form() 

File "/home/zerocod3r/lib/python3.5/site-packages/django/forms/forms.py" in _clean_form 
398. cleaned_data = self.clean() 

File "/home/zerocod3r/PublicationPlatform/mainapp/forms.py" in clean 
27. if user.first() is not None: 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/models/query.py" in first 
556. objects = list((self if self.ordered else self.order_by('pk'))[:1]) 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/models/query.py" in __iter__ 
256. self._fetch_all() 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/models/query.py" in _fetch_all 
1087. self._result_cache = list(self.iterator()) 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/models/query.py" in __iter__ 
54. results = compiler.execute_sql() 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/models/sql/compiler.py" in execute_sql 
833. cursor = self.connection.cursor() 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/backends/base/base.py" in cursor 
231. cursor = self.make_debug_cursor(self._cursor()) 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/backends/base/base.py" in _cursor 
204. self.ensure_connection() 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/backends/base/base.py" in ensure_connection 
199. self.connect() 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/backends/base/base.py" in connect 
171. self.connection = self.get_new_connection(conn_params) 

File "/home/zerocod3r/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py" in get_new_connection 
209. conn = Database.connect(**conn_params) 

Exception Type: TypeError at /registration/ 
Exception Value: argument 1 must be str, not list 

私のsettings.pyは

import os 

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) 

SECRET_KEY = 'some-text' 
DEBUG = True 

ALLOWED_HOSTS = ['zerocod3r.pythonanywhere.com','*'] 

INSTALLED_APPS = [ 
'django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'mainapp', 
] 

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', 
] 

ROOT_URLCONF = 'PublicationPlatform.urls' 

TEMPLATES = [ 
{ 
    'BACKEND': 'django.template.backends.django.DjangoTemplates', 
    #'DIRS': [os.path.join(BASE_DIR, 'templates')] 
    'DIRS': ['/home/zerocod3r/PublicationPlatform/templates/'] 
    , 
    'APP_DIRS': True, 
    'OPTIONS': { 
     'context_processors': [ 
      'django.template.context_processors.debug', 
      'django.template.context_processors.request', 
      'django.contrib.auth.context_processors.auth', 
      'django.contrib.messages.context_processors.messages', 
     ], 
    }, 
}, 
] 

WSGI_APPLICATION = 'PublicationPlatform.wsgi.application' 

DATABASES = { 
'default': { 
    'ENGINE': 'django.db.backends.sqlite3', 
    'NAME': os.path.join(BASE_DIR, 'db.sqlite3'), 
} 
} 

AUTH_PASSWORD_VALIDATORS = [ 
{ 
    'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator', 
}, 
{ 
    'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator', 
}, 
{ 
    'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator', 
}, 
{ 
    'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator', 
}, 
] 


MEDIA_ROOT = os.path.join(BASE_DIR, 'media') 
MEDIA_URL = '/media/' 

STATICFILES_DIRS = [ 
'/home/zerocod3r/PublicationPlatform/mainapp/static/', 
] 

STATIC_ROOT = os.path.join(BASE_DIR, 'mainapp/static') 
STATIC_URL = '/static/' 

Answer 1

あなたのclean()方法を再度書き込むことができ、トレースバックと

model = None 
if role == 'Author': 
    model = UserSignup 
elif role == 'Publisher': 
    model = PubSignup 
if model is not None: 
    try: 
     user = model.objects.get(email=email) 
     raise forms.ValidationError(
       "Email already registered. Try again.") 
    except: 
     pass