POST HTML FORM 验证不适用于 Django

Question

我目前正在学习 Django，我将我的注册 FORM 与我的 views.py 连接起来，并编写了一些后端代码，问题是它与我的 .html 文件成功链接，并且POST 元素正在注册，但当我尝试进行验证时，(if POST_element < 10)，它什么也没做。

编辑：Post 元素被我的后端识别，我用 print(username) 语句测试它，它工作正常。

这是我的 HTML 注册表格的一部分：

<div class="limiter">
        <div class="container-login100" style="background:black;">
            <div class="wrap-login100">
                <form action="{% url 'register' %}" method="POST" class="login100-form validate-form">
                    {% csrf_token %}
                    <span class="login100-form-logo">
                        <i class="zmdi zmdi-landscape"></i>
                    </span>
                    <span class="login100-form-title p-b-34 p-t-27">
                        Register
                    </span>

                    <div class="wrap-input100 validate-input" data-validate = "Enter username">
                        <input class="input100" type="text" name="username" placeholder="Username">
                        <span class="focus-input100" data-placeholder="&#xf207;"></span>
                    </div>

这是我的 views.py 管理寄存器的一部分：

def register(request):
    if request.method=="POST":
        username = request.POST["username"]
        password = request.POST["pass"]
        password_confirm = request.POST["pass-confirm"]
        email = request.POST["mail"]
    
        if len(username) < 7:
            messages.error(request,"Username must be more than 10 char.") #Don't get any error

        else:
            messages.success(request,"Success")

    return render(request, 'users/register.html')

这是我的 urls.py:

urlpatterns = [
    path('', views.register, name='register'),
    path('login/', views.login, name='login')
]

Answer 1

关于 POST 请求的 django-doc 节选。

You should always return an HttpResponseRedirect after successfully dealing with POST data. This tip isn’t specific to Django; it’s good web development practice in general.

您在 POST 请求中没有 return 任何响应，并且 messages 框架是否有任何消息由 error,success,etc 组成。会将消息发送到下一个重定向页面，这就是为什么您看不到该消息，并且您的情况正常。

检查下面的代码：

Html代码：

<div class="limiter">
    <div class="container-login100" style="background:black;">
        <div class="wrap-login100">
            <form class="login100-form validate-form"  method='POST' action="{% url 'users:register' %}" >
                {% csrf_token %}
                <span class="login100-form-logo">
                    <i class="zmdi zmdi-landscape"></i>
                </span>

                <span class="login100-form-title p-b-34 p-t-27">
                    Register
                </span>

                <div class="wrap-input100 validate-input" data-validate = "Enter username">
                    <input class="input100" type="text" name="username" placeholder="Username" required>
                    <span class="focus-input100" data-placeholder="&#xf207;"></span>
                </div>

                <div class="wrap-input100 validate-input" data-validate="Enter password">
                    <input class="input100" type="password" name="pass" placeholder="Password" required>
                    <span class="focus-input100" data-placeholder="&#xf191;"></span>
                </div>

                <div class="wrap-input100 validate-input" data-validate="Confirm password">
                    <input class="input100" type="password" name="pass-confirm" placeholder="Confirm Password" required>
                    <span class="focus-input100" data-placeholder="&#xf191;"></span>
                </div>

                <div class="wrap-input100 validate-input" data-validate="Enter Email">
                    <input class="input100" type="email" name="mail" placeholder="E-Mail" required>
                    <span class="focus-input100" data-placeholder="&#xf191;"></span>
                </div>

                <div class="container-login100-form-btn">
                    <button class="login100-form-btn">
                        Register
                    </button>
                </div>

                <div class="text-center p-t-90">
                    <a class="txt1" href="login">
                        Already registered?
                    </a>
                </div>

            </form>
        </div>
    </div>
</div>

在<style>标签的页面顶部设置如下样式，即内联样式：

<style>
    .green{
        color:green;
        font-size:1.3rem;
    }
    .red{
        color:red;
        font-size:1.3rem;
    }
</style>

urls.py

app_name='users'
urlpatterns = [
    path('', views.register, name='register'),
    path('login/', views.login, name='login')
]

Note: Giving app_name is a good practice,works like template namespacing while giving urls.

views.py

from django.http import HttpResponseRedirect
from django.shortcuts import render
from django.contrib import messages
from django.urls import reverse


def register(request):
    if request.method == "POST":
        username = request.POST["username"]
        password = request.POST["pass"]
        password_confirm = request.POST["pass-confirm"]
        email = request.POST["mail"]

        # Here everying exist.
        print("UserName : ", username)
        print('Email : ', email)
        print('Password : ', password)
        print('Password Confirm : ', password_confirm)

        if len(username) < 7:
            # Here error exist.
            print('Username must be more than 10 char.')
            messages.error(
                request, "Username must be more than 10 char.", 'red')
            return HttpResponseRedirect(reverse('users:register'))

        else:
            messages.success(request, "Success! form submitted.", 'green')
            return HttpResponseRedirect(reverse('users:register'))

    return render(request, 'users/register.html')

Note: You can also do password hashing through make_password which is from django.contrib.auth.hashers import make_password.

POST HTML FORM 验证不适用于 Django

POST HTML FORM verificaton doesn't work with Django

python

django

django-templates

django-urls

django-views