Django注册表单报错：TypeError: Field.__init__()意外收到参数'Label'

报错栈 #

File "C:\Users\hitechlab\Desktop\mysite\home\urls.py", line 18, in 
from . import views
File "C:\Users\hitechlab\Desktop\mysite\home\views.py", line 4, in 
from .forms import RegistrationForm
File "C:\Users\hitechlab\Desktop\mysite\home\forms.py", line 9, in 
class RegistrationForm(forms.Form):
File "C:\Users\hitechlab\Desktop\mysite\home\forms.py", line 10, in RegistrationForm
username = forms.CharField(Label='Tài Khoản', max_length=30)

File "C:\Users\hitechlab\AppData\Local\Programs\Python\Python310\lib\site-packages\django\forms\fields.py", line 267, in __init__
super().__init__(**kwargs)
TypeError: Field.__init__() got an unexpected keyword argument 'Label'

相关代码 #

urls.py

from unicodedata import name
from django.urls import path

from blog.models import Post
from . import views
urlpatterns = [
    path('', views.list, name = 'blog'),
    path('<int:id>/', views.post, name = 'post'),
]

forms.py

import email

from tkinter import Label, Widget

from django import forms
import re
from django.contrib.auth.models import User
from django.core.exceptions import ObjectDoesNotExist
class RegistrationForm(forms.Form):
    username = forms.CharField(Label='Tài Khoản', max_length=30)
    email = forms.EmailField(Label='Email')
    password1=forms.CharField(Label= 'Mật Khẩu', Widget = forms.PasswordInput())
    password2=forms.CharField(Label= 'Nhập lại mật khẩu', Widget = forms.PasswordInput())

def clean_password2(self):
        if 'password1' in self.cleaned_data:
            password1= self.cleaned_data ['password1']
            password2= self.cleaned_data ['password2']
            if password1==password2 and password1:
                return password2 
            raise forms.ValidationError('Mật khẩu không hợp lệ')
    def clean_username (self):
        username= self.clean_data['username']
        if not re.search(r'^\w+$',username):
            raise forms.ValidationError("Tên tài khoản có kí tự đặc biệt")
        try:
            User.objects.get(username=username) 
        except ObjectDoesNotExist:
            return username
        raise forms.ValidationError('Tài Khoản không tồn tại')
    def save(self):
        User.objects.create_user(username=self.clean_data['username'], email=self.clean_data['email'], password= self.clean_data ['password1'])

1. 修正字段参数名大小写 #

Django表单字段的参数名是小写的label和widget，你写成了大写的Label和Widget，这是报错的直接原因。

2. 修正方法缩进 #

clean_password2、clean_username、save方法需要缩进，作为RegistrationForm类的成员方法，否则会被当成全局函数，导致调用时出错。

3. 修正clean_data为cleaned_data #

Django表单中获取清洗后的数据用的是self.cleaned_data，不是self.clean_data，这会导致运行时找不到属性的错误。

4. 移除不必要的导入 #

你导入了tkinter的Label和Widget，这和Django表单无关，应该删除，避免混淆。

修正后的forms.py代码 #

from django import forms
import re
from django.contrib.auth.models import User
from django.core.exceptions import ObjectDoesNotExist

class RegistrationForm(forms.Form):
    username = forms.CharField(label='Tài Khoản', max_length=30)
    email = forms.EmailField(label='Email')
    password1 = forms.CharField(label='Mật Khẩu', widget=forms.PasswordInput())
    password2 = forms.CharField(label='Nhập lại mật khẩu', widget=forms.PasswordInput())

    def clean_password2(self):
        if 'password1' in self.cleaned_data:
            password1 = self.cleaned_data['password1']
            password2 = self.cleaned_data['password2']
            if password1 == password2 and password1:
                return password2 
            raise forms.ValidationError('Mật khẩu không hợp lệ')
    
    def clean_username(self):
        username = self.cleaned_data['username']
        if not re.search(r'^\w+$', username):
            raise forms.ValidationError("Tên tài khoản có kí tự đặc biệt")
        try:
            User.objects.get(username=username) 
        except ObjectDoesNotExist:
            return username
        raise forms.ValidationError('Tài khoản đã tồn tại')  # 修正原提示逻辑错误
    
    def save(self):
        return User.objects.create_user(
            username=self.cleaned_data['username'], 
            email=self.cleaned_data['email'], 
            password=self.cleaned_data['password1']
        )

另外注意：原clean_username中的错误提示逻辑有误，当查询到用户存在时，应该提示“Tài khoản đã tồn tại”（账号已存在），而不是“Tài Khoản không tồn tại”（账号不存在），已在修正后的代码中调整。

内容的提问来源于stack exchange，提问作者tommyte0