如何在Django中将邮箱同时作为用户名存入数据库？

1. 修改表单文件（forms.py） #

创建仅展示邮箱、密码、重复密码的表单，同时在保存用户时自动将邮箱地址赋值给username字段，适配Django User模型要求：

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

class EmailAsUsernameSignUpForm(UserCreationForm):
    email = forms.EmailField(
        max_length=254,
        required=True,
        help_text='请输入有效的邮箱地址'
    )

    class Meta:
        model = User
        fields = ['email', 'password1', 'password2']  # 仅保留需要的三个字段

    def save(self, commit=True):
        user = super().save(commit=False)
        # 将邮箱赋值给username字段
        user.username = self.cleaned_data['email']
        if commit:
            user.save()
        return user
    
    def clean_email(self):
        # 验证邮箱唯一性
        email = self.cleaned_data.get('email')
        if User.objects.filter(email=email).exists():
            raise forms.ValidationError('该邮箱已被注册')
        return email

2. 更新注册视图（views.py） #

函数视图修改 #

替换原Example_register视图，使用新表单：

@unauthenticatedUser
def Example_register(request):
    form = EmailAsUsernameSignUpForm()
    if request.method == 'POST':
        form = EmailAsUsernameSignUpForm(request.POST)
        if form.is_valid():
            user = form.save()
            # 添加用户到指定分组
            group = Group.objects.get(name='studends')
            user.groups.add(group)
            messages.success(request, '账号创建成功，请登录')
            return redirect('login')
    context = {'form': form}
    return render(request, 'exampl_register.html', context)

类视图（带邮箱验证）修改 #

如果使用SignUpView类视图，替换表单并保留原有激活逻辑：

class SignUpView(View):
    form_class = EmailAsUsernameSignUpForm
    template_name = 'signup.html'

    def get(self, request, *args, **kwargs):
        form = self.form_class()
        return render(request, self.template_name, {'form': form})

    def post(self, request, *args, **kwargs):
        form = self.form_class(request.POST)
        if form.is_valid():
            user = form.save(commit=False)
            user.is_active = False  # 激活前禁用账号
            user.save()

            # 发送激活邮件
            current_site = get_current_site(request)
            subject = '激活你的账号'
            message = render_to_string('account_activation_email.html', {
                'user': user,
                'domain': current_site.domain,
                'uid': urlsafe_base64_encode(force_bytes(user.pk)),
                'token': account_activation_token.make_token(user),
            })
            user.email_user(subject, message)

            messages.success(request, '请检查邮箱完成账号激活')
            return redirect('login')

        return render(request, self.template_name, {'form': form})

3. 注册页面模板示例 #

确保模板仅渲染表单的三个字段（以exampl_register.html为例）：

<form method="POST">
    {% csrf_token %}
    <div>
        {{ form.email.label_tag }}
        {{ form.email }}
        {% if form.email.errors %}
            <span class="error">{{ form.email.errors.0 }}</span>
        {% endif %}
    </div>
    <div>
        {{ form.password1.label_tag }}
        {{ form.password1 }}
        {% if form.password1.errors %}
            <span class="error">{{ form.password1.errors.0 }}</span>
        {% endif %}
    </div>
    <div>
        {{ form.password2.label_tag }}
        {{ form.password2 }}
        {% if form.password2.errors %}
            <span class="error">{{ form.password2.errors.0 }}</span>
        {% endif %}
    </div>
    <button type="submit">完成注册</button>
</form>

关键说明 #

• 原登录逻辑无需修改：你已实现用邮箱作为username参数调用authenticate，与邮箱赋值给username的逻辑完全匹配。
• Profile模型及信号保持不变：用户创建时会自动生成关联的Profile记录。

内容的提问来源于stack exchange，提问作者user19433213