Django登录表单无法验证

Question

尝试使用基于类的视图（第一次）创建登录视图，并且所有内容都填充，但它一直说我的用户名无效。请帮我弄清楚什么是错的。

的login.html（编辑，以显示整个表格）：

<div class="card border-grey border-lighten-3 px-1 py-1 m-0"> 
      <div class="card-header no-border"> 
       <div class="card-title text-xs-center"> 
        <img src="{% static 'images/logo/stack-logo-dark.png' %}" alt="branding logo"> 
        {% if form.non_field_errors %} 
         {% for error in form.non_field_errors %} 
          <h6 class="card-subtitle line-on-side text-muted text-xs-center font-small-3 pt-2 danger"><span>Sorry, that login was invalid. Please try again.</span></h6> 
         {% endfor %} 
        {% endif %} 
      </div> 
     </div> 
     <div class="card-body collapse in"> 
      <div class="card-block"> 
       <form class="form-horizontal" method="post" action="{% url 'dispatch:login' %}" role="form"> 
        {% csrf_token %} 
        <fieldset class="form-group position-relative has-icon-left"> 
         <input type="text" class="form-control" id="username" placeholder="Your Username" required> 
         <div class="form-control-position"> 
          <i class="ft-user"></i> 
         </div> 
        </fieldset> 
        <fieldset class="form-group position-relative has-icon-left"> 
         <input type="password" class="form-control" id="password" placeholder="Enter Password" required> 
         <div class="form-control-position"> 
          <i class="fa fa-key"></i> 
         </div> 
        </fieldset> 
        <fieldset class="form-group row"> 
         <div class="col-md-6 col-xs-12 text-xs-center text-sm-left"> 
          <fieldset> 
           <input type="checkbox" id="remember-me" class="chk-remember"> 
           <label for="remember-me"> Remember Me</label> 
          </fieldset> 
         </div> 
         <div class="col-md-6 col-xs-12 float-sm-left text-xs-center text-sm-right"><a href="recover-password.html" class="card-link">Forgot Password?</a></div> 
        </fieldset> 
        <button type="submit" class="btn btn-outline-primary btn-block"><i class="ft-unlock"></i> Login</button> 
       </form> 

views.py：（从一个教程拉动）

class LoginView(FormView): 
    """ 
    Provides the ability to login as a user with a username and password 
    """ 
    success_url = '/' 
    form_class = LoginForm 
    redirect_field_name = REDIRECT_FIELD_NAME 
    template_name = 'pages/login.html' 

    @method_decorator(sensitive_post_parameters('password')) 
    @method_decorator(csrf_protect) 
    @method_decorator(never_cache) 
    def dispatch(self, request, *args, **kwargs): 
     # Sets a test cookie to make sure the user has cookies enabled 
     request.session.set_test_cookie() 

     return super(LoginView, self).dispatch(request, *args, **kwargs) 

    def form_valid(self, form): 
     auth_login(self.request, form.get_user()) 

     # If the test cookie worked, go ahead and 
     # delete it since its no longer needed 
     if self.request.session.test_cookie_worked(): 
      self.request.session.delete_test_cookie() 

     return super(LoginView, self).form_valid(form) 

    def get_success_url(self): 
     redirect_to = self.request.REQUEST.get(self.redirect_field_name) 
     if not is_safe_url(url=redirect_to, host=self.request.get_host()): 
      redirect_to = self.success_url 
     return redirect_to 


class LogoutView(RedirectView): 
    """ 
    Provides users the ability to logout 
    """ 
    url = '/accounts/login/' 

def get(self, request, *args, **kwargs): 
    auth_logout(request) 
    return super(LogoutView, self).get(request, *args, **kwargs) 

forms.py

class LoginForm(forms.Form): 
    username = forms.CharField(max_length=255, required=True) 
    password = forms.CharField(widget=forms.PasswordInput, required=True) 

    def clean(self): 
     username = self.cleaned_data.get('username') 
     password = self.cleaned_data.get('password') 
     user = authenticate(username=username, password=password) 
     if not user or not user.is_active: 
      raise forms.ValidationError("Sorry, that login was invalid. Please try again.") 
     return self.cleaned_data 

    def login(self, request): 
     username = self.cleaned_data.get('username') 
     password = self.cleaned_data.get('password') 
     user = authenticate(username=username, password=password) 
     return user 

urls.py

app_name = 'dispatch' 

urlpatterns = [ 
    url(r'^$', views.IndexView.as_view(), name='index'), 
    url(r'^accounts/login/$', views.LoginView.as_view(), name='login'), 
    url(r'^logout/$', views.LogoutView.as_view(), {'next_page': '/accounts/login'}, name='logout'), 
    url(r'^profile/(?P<pk>\d+)/$', views.ProfileDetailView.as_view(), name='profile_detail'), 
] 

Answer 1

我不知道为什么该教程说得那么复杂，但你应该做的是延长默认的登录查看并添加get_success_url功能和template_name

from django.contrib.auth.views import LoginView as AuthLoginView 

class LoginView(AuthLoginView): 
    success_url = '/' 
    template_name = 'pages/login.html' 
    redirect_field_name = REDIRECT_FIELD_NAME 

    def get_success_url(self): 
     redirect_to = self.request.GET.get(self.redirect_field_name) 
     if not is_safe_url(url=redirect_to, host=self.request.get_host()): 
      redirect_to = self.success_url 
     return redirect_to 

编辑：您的表格缺少输入上的name属性。这就是django正在寻找价值的地方。

<input type="text" name="{{ form.username.name }}" /> 
<input type="password" name="{{ form.password.name }}" />