Question

我的 urls.py 是这样的：

from django.conf.urls import url
from django.views.generic import ListView, TemplateView

from .models import Dreamreal
from . import views
urlpatterns = [
    url(r'^connection/login/$', views.login),
    url(r'^connection/$', TemplateView.as_view(template_name = 
    'login.html')),
    url(r'^login/$', views.login, name = 'login')
]

我的 views.py 是：

from .forms import LoginForm
from . import models

def login(request):
username = "not logged in"

if request.POST:
    # GET THE POSTED FORM
    MyLoginForm = LoginForm(request.POST)
    if MyLoginForm.is_valid():
        username = MyLoginForm.cleaned_data['username']
else:
    MyLoginForm = LoginForm()

return render(request, 'loggedin.html', {'username' : username})

我的 forms.py 是：

from django import forms
from .models import Dreamreal

class LoginForm(forms.Form):
username = forms.CharField(max_length = 100)
password = forms.CharField(widget = forms.PasswordInput())

# METHOD TO VERIFY IF USER IS IN DB
def clean_message(self):
    username = self.cleaned_data.get("username")
    dbuser = Dreamreal.objects.filter(name = 'username')

    if not dbuser:
        raise forms.ValidationError("User does not exist in our db!")

    return username

我的 models.py 是：

from django.db import models
class Dreamreal(models.Model):
website = models.CharField(max_length = 50)
mail = models.CharField(max_length = 50)
name = models.CharField(max_length = 50)
phonenumber = models.IntegerField()

class Meta:
    db_table = 'dreamreal'

我的 login.html 是：

<html>
<head>
    <title>LOG IN</title>
</head>
<body>
    <form name="form" action="/connection/login/" method="POST">
    {% csrf_token %}
    <div style="max-width: 470px;">
        <center><input type="text" name="username" 
        placeholder="username" style="margin-left: 20%;" required>
        </center>
    </div>
    <br>
    <div style="max-width: 470px;">
        <center><input type="password" name="password" 
        placeholder="password" style="margin-left: 20%;"></center>
    </div>
    <br>
    <div style="max-width: 470px;">
        <center><button style = "border:0px; background-color:#4285F4; 
        margin-top:8%; height:35px; width:80%;margin-left:19%;" type = 
        "submit" value = "Login" >
              <strong>Login</strong>
            </button></center>
        </div>

    </form>

</body>
</html>

我的 loggedin.html 是：

{% extends 'base.html' %}
<html>
<head>
<title>{% block title%}{{ username }}{% endblock %}</title>
</head>
<body>
{% block content %}
    You are : <strong>{{ username }}</strong>
{% endblock %}

当我运行代码，然后在/ connection / url的dield输入中输入名称和密码时，它会重定向到/ connectionlogin / url但显示我在表单中输入的所有用户名都有效，而不应该仅显示存储在数据库名称 Dreamreal 中的名称。有人请帮忙！

Answer 1

您正在验证username字段，因此您应该为方法clean_username命名。如果表单有一个名为clean_message的字段，Django只会调用message字段。

要查看模板中的任何表单错误，您需要在调用render时在上下文中包含表单：

return render(request, 'loggedin.html', {'username' : username, 'form': MyLoginForm}

除非您在模板中使用form，否则您无法在模板中看到错误。最简单的方法是包含{{ form }}。如果您需要执行更高级的操作，请参阅working with forms上的文档。

Django形成自我验证不起作用

1 个答案: