在Django中高效处理HTML表单数据：从提交到数据库存储的完整指南

<form id="signup-form" action="#" method="post">
    {% csrf_token %} {# Django CSRF 保护令牌，必须包含 #}

    <label for="name">Full Name</label>
    <input autocomplete="off" type="text" name="username" id="name" class="name">

    <label for="email">Email Address</label>
    <input autocomplete="off" type="email" name="emailAddress" id="email" class="email">

    <label for="phone">Phone Number - <small>Optional</small></label>
    <input autocomplete="off" type="text" name="phone" id="phone">

    <label for="password">Password</label>
    <input autocomplete="off" type="password" name="password" id="password" class="pass">

    <label for="passwordCon">Confirm Password</label>
    <input type="password" name="passwordCon" id="passwordCon" class="passConfirm">

    <input type="submit" form="signup-form" value="Signup Now" id="submit">
</form>

# your_app/urls.py
from django.urls import path
from . import views

urlpatterns = [
    path("signup/", views.signUpView, name="user-signup"),
]

# your_app/views.py
from django.shortcuts import render, redirect
from django.contrib.auth.models import User
from django.contrib.auth import login

def signUpView(request, *args, **kwargs):
    if request.method == "POST":
        # 1. 从request.POST中提取表单数据
        # 注意：这里的键名必须与HTML表单中input元素的'name'属性值完全一致
        username = request.POST.get("username")
        email_address = request.POST.get("emailAddress") 
        password = request.POST.get("password")
        password_confirm = request.POST.get("passwordCon") # 确认密码字段
        phone_number = request.POST.get("phone") # 可选字段

        # 2. 数据验证 (这里仅作示例，实际应用中应更全面)
        errors = []
        if not username:
            errors.append('用户名不能为空。')
        if not email_address:
            errors.append('邮箱不能为空。')
        if not password:
            errors.append('密码不能为空。')
        if password != password_confirm:
            errors.append('两次输入的密码不一致。')
        # 更多验证，如邮箱格式、密码强度等

        if errors:
            # 如果存在错误，重新渲染表单并显示错误信息
            return render(request, "signupPage.html", {'errors': errors})

        # 3. 检查用户名或邮箱是否已存在
        if User.objects.filter(username=username).exists():
            errors.append('用户名已存在。')
        if User.objects.filter(email=email_address).exists():
            errors.append('邮箱已注册。')

        if errors:
            return render(request, "signupPage.html", {'errors': errors})

        # 4. 创建并保存用户实例
        try:
            # 使用create_user方法，它会自动处理密码哈希和用户保存
            user = User.objects.create_user(username=username, email=email_address, password=password)

            # 如果User模型有额外字段（例如通过自定义User模型或UserProfile），可以在这里更新
            # 例如：user.profile.phone = phone_number
            # user.profile.save()

            # 5. 登录用户 (可选)
            login(request, user)

            # 6. 重定向到成功页面
            return redirect("homepage") # 假设你有一个名为'homepage'的URL
        except Exception as e:
            # 捕获其他可能的错误，例如数据库错误
            errors.append(f'注册失败：{e}')
            return render(request, "signupPage.html", {'errors': errors})

    else:
        # 如果是GET请求，渲染注册表单页面
        return render(request, "signupPage.html")