Python Django引发异常：ModelForm没有指定模型类

我正在使用Django框架，它抛出了这个异常：ModelForm没有指定模型类

这是我的代码：

视图.py

from django.contrib.auth import authenticate, login, logout
from django.shortcuts import redirect
from DjangoApp1.forms import login_form
from django.shortcuts import render  #For render templates

def login_view(request):    

    form = login_form()
    context = { 'form': form, 'mensaje':'Logeandose'}

    if request.method == 'POST':        
        form = login_form(request.POST)     
        usuario = request.POST.get('username')
        contrase = request.POST.get('password')
    # Hacer el login
        user = authenticate(username=usuario, password=contrase)
        if user is not None and user.is_active:
            login(request, user)
            context['mensaje'] =  u'Logeado como  %s, contraseña %s' % (usuario, contrase)
        else:
            context['mensaje'] =  u'No usuario  o contraseña incorrecta'

    return render (request, 'DjangoApp1/login.html', context)

from django.contrib.auth.models import User
from django import forms

class login_form(forms.ModelForm):
    username = forms.SlugField (max_length=8, 
                             label='Usuario: ')
    password = forms.SlugField (max_length=8, 
                        widget=forms.PasswordInput(),  
                        label='Contraseña:',
                        help_text='Hasta 8 letras')

class Meta:
    model  = User
    fields = ('username',  'password')

还有models.py，其中有登录表单：

型号.py

from django.contrib.auth import authenticate, login, logout
from django.shortcuts import redirect
from DjangoApp1.forms import login_form
from django.shortcuts import render  #For render templates

def login_view(request):    

    form = login_form()
    context = { 'form': form, 'mensaje':'Logeandose'}

    if request.method == 'POST':        
        form = login_form(request.POST)     
        usuario = request.POST.get('username')
        contrase = request.POST.get('password')
    # Hacer el login
        user = authenticate(username=usuario, password=contrase)
        if user is not None and user.is_active:
            login(request, user)
            context['mensaje'] =  u'Logeado como  %s, contraseña %s' % (usuario, contrase)
        else:
            context['mensaje'] =  u'No usuario  o contraseña incorrecta'

    return render (request, 'DjangoApp1/login.html', context)

from django.contrib.auth.models import User
from django import forms

class login_form(forms.ModelForm):
    username = forms.SlugField (max_length=8, 
                             label='Usuario: ')
    password = forms.SlugField (max_length=8, 
                        widget=forms.PasswordInput(),  
                        label='Contraseña:',
                        help_text='Hasta 8 letras')

class Meta:
    model  = User
    fields = ('username',  'password')

---

您需要缩进

类元

，因为它是模型表单类定义的一部分：

class login_form(forms.ModelForm):
    username = forms.SlugField (max_length=8, 
                             label='Usuario: ')
    password = forms.SlugField (max_length=8, 
                        widget=forms.PasswordInput(),  
                        label='Contraseña:',
                        help_text='Hasta 8 letras')
    class Meta:
        model  = User
        fields = ('username',  'password')

---

详细解释。

您的

类元缩进是这样的吗？如果是这样，那么您需要将其缩进一级，因为
类Meta
属于表单类。此外，python类应该使用camelcase，变量名称应该都是小写加下划线，因此您的表单应该是
LoginForm
。看看pep8的定义：如果我将Meta类写入LoginForm类，它会抛出一个IndentationError异常，那么您的缩进是不正确的，可能是您将制表符和空格混合了。谢谢你们两个！问题解决了。