重定向到登录页面后Django Form字段消失

Question

我使用Django表单作为用户登录页面。当用户的登录不正确时，它会返回到登录页面。然而，当它这样做时，表单输入字段就消失了，用户不能输入任何内容，因为输入只是。。。不在那里。注意，当我点击导航栏中的登录按钮时，它显示并正常工作；\登录"；。只有在运行postlogin视图之后，输入才会消失。

在我运行postlogin视图后，它看起来像这样：

从登录后再次重定向到登录页面后的样子

应该是这样的：

点击导航栏中的登录时的样子

这是我的登录和登录后的视图：

def login(request):
# Rendering login page
assert isinstance(request, HttpRequest)
return render(
request,
'app/login.html',
{
'title': 'Login',
'message': 'Login to your account',
'year': datetime.now().year,
'form':form
}
)
def postlogin(request):
email=request.POST.get('email')
pasw=request.POST.get('password')
try:
# if there is no error then signin the user with given email and password
user = authe.sign_in_with_email_and_password(email, pasw)
except:
message="Invalid credentials!"
# return to login page if password and email was invalid
return render(request,"app/login.html", {'message':message, 'current_user': authe.current_user})
# set current session with user token
session_id=user['idToken']
request.session['uid']=str(session_id)

return render(request,"app/home.html", {"email":email, 'current_user': authe.current_user})

这是我的urls.py

from datetime import datetime
from django.urls import path
from django.contrib import admin
from django.contrib.auth.views import LoginView, LogoutView
from app import forms
from app import views

urlpatterns = [
path('', views.home, name='home'),
path('contact/', views.contact, name='contact'),
path('about/', views.about, name='about'),
path('login/',
LoginView.as_view
(
template_name='app/login.html',
authentication_form=forms.BootstrapAuthenticationForm,
extra_context=
{
'title': 'Log in',
'year' : datetime.now().year,
}
),
name='login'),
path('postlogin/', views.postlogin, name='postlogin'),
path('postsignup/', views.postsignup, name='postsignup'),
#path('logout/', LogoutView.as_view(next_page=''), name='logout'),
path('logout/', views.logout, name='logout'),
path('admin/', admin.site.urls),
]

这是我的表格.py:

from django import forms
from django.contrib.auth.forms import AuthenticationForm, UserCreationForm
from django.utils.translation import ugettext_lazy as _
class BootstrapAuthenticationForm(AuthenticationForm):
"""Authentication form which uses boostrap CSS."""
email = forms.CharField(max_length=254,
widget=forms.TextInput({
'class': 'form-control',
'placeholder': 'Email'}))
password = forms.CharField(label=_("Password"),
widget=forms.PasswordInput({
'class': 'form-control',
'placeholder':'Password'}))

这是我的登录.html

{% block content %}
<h2>{{ title }}</h2>
{% if current_user %} 
<form id="logoutForm" action="/logout/" method="post" class="navbar-right">
{% csrf_token %}
<ul class="nav navbar-nav navbar-right">
<li><span class="navbar-brand">Hello {{ user.username }}!</span></li>
<li><a href="javascript:document.getElementById('logoutForm').submit()">Log off</a></li>
</ul>
</form>
{% else %}
<ul class="nav navbar-nav navbar-right">
<li><a href="/login/">Log in</a></li>
</ul>
{% endif %}
<div class="row">
<div class="col-md-8">
<section id="loginForm">
<form action="/postlogin/" method="post" class="form-horizontal">
{% csrf_token %}
<h4>Use a local account to log in.</h4>
<hr />
<div class="form-group">
<label for="id_username" class="col-md-2 control-label">Email</label>
<div class="col-md-10">
{{ form.email }}
</div>
</div>
<div class="form-group">
<label for="id_password" class="col-md-2 control-label">Password</label>
<div class="col-md-10">
{{ form.password }}
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="hidden" name="next" value="/" />
<input type="submit" value="Log in" class="btn btn-default" />
</div>
</div>
{% if form.errors %}
<p class="validation-summary-errors">Please enter a correct user name and password.</p>
{% endif %}
</form>
</section>
</div>
<div class="col-md-4">
<section id="socialLoginForm"></section>
</div>
</div>
{% endblock %}

{% block scripts %}
{% load staticfiles %}
<script src="{% static 'app/scripts/jquery.validate.min.js' %}"></script>
{% endblock %}

Answer 1

您可以使用Django重定向函数重定向到另一个视图或url，因此：

from django.shortcuts import redirect
def postlogin(request):
email=request.POST.get('email')
pasw=request.POST.get('password')
try:
user = authe.sign_in_with_email_and_password(email, pasw)
except:
message="Invalid credentials!"
# return to login function if password and email was invalid
return redirect(login) #or return redirect('/some/url/')