如何在django中注册后自动登录用户

Question

这是我目前用于注册的内容：

def register(request):
    if request.method == 'POST':
        form = UserCreationForm(request.POST)
        if form.is_valid():
            new_user = form.save()
            messages.info(request, "Thanks for registering. Please login to continue.")
            return HttpResponseRedirect("/dashboard/")
    else:
        form = UserCreationForm()
    return render_to_response("accounts/register.html", {
        'form': form,
    }, context_instance=RequestContext(request))

创建帐户后是否可以不要求用户手动登录，而只是自动登录？感谢。

编辑：我尝试过login（）函数但没有成功。我认为问题是没有设置AUTHENTICATION_BACKENDS。

Answer 1

使用authenticate()和login()函数：

from django.contrib.auth import authenticate, login

def register(request):
    if request.method == 'POST':
        form = UserCreationForm(request.POST)
        if form.is_valid():
            new_user = form.save()
            messages.info(request, "Thanks for registering. You are now logged in.")
            new_user = authenticate(username=form.cleaned_data['username'],
                                    password=form.cleaned_data['password1'],
                                    )
            login(request, new_user)
            return HttpResponseRedirect("/dashboard/")

Answer 2

基于类的视图这里是为我工作的代码（最初是Django 1.7，更新为2.1）

from django.contrib.auth import authenticate, login
from django.contrib.auth.forms import UserCreationForm
from django.http import HttpResponseRedirect
from django.views.generic import FormView

class SignUp(FormView):
    template_name = 'signup.html'
    form_class = UserCreateForm
    success_url='/account'

    def form_valid(self, form):
        #save the new user first
        form.save()
        #get the username and password
        username = self.request.POST['username']
        password = self.request.POST['password1']
        #authenticate user then login
        user = authenticate(username=username, password=password)
        login(self.request, user)
        return HttpResponseRedirect(self.get_success_url)

Answer 3

您可以将Django的UserCreationForm子类化，并覆盖它的save方法以在commit = True时将其登录。

forms.py

from django.contrib.auth.forms import UserCreationForm
from django.contrib.auth import login

class CustomUserCreationForm(UserCreationForm):
    """
    A ModelForm for creating a User and logging 
    them in after commiting a save of the form.
    """

    def __init__(self, request, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.request = request

    class Meta(UserCreationForm.Meta):
        pass

    def save(self, commit=True):
        user = super().save(commit=commit)
        if commit:
            auth_user = authenticate(
                username=self.cleaned_data['username'], 
                password=self.cleaned_data['password1']
            )
            login(self.request, auth_user)

        return user

您只需要确保在实例化表单时传递请求对象。您可以通过重写视图的get_form_kwargs方法来做到这一点。

views.py

def get_form_kwargs(self):
    form_kwargs = super().get_form_kwargs(self)
    form_kwargs['request'] = self.request
    return form_kwargs

或者，请确保在实例化form_class时执行CustomUserCreationForm(data=request.POST, request=self.request)。