我正在尝试在我的模板(寄存器.html)中显示验证错误，但它没有显示。这段代码有什么问题？
还有一个问题"我如何显示此表单中已经存在的电子邮件">
我不知道如何显示"电子邮件已经存在"。
代码在这里。
forms.py
from django.contrib.auth.models import User
from django import forms
from .models import *
from django.utils.translation import gettext as _
class RegisterForm(forms.ModelForm):
username = forms.CharField(widget=forms.TextInput())
password = forms.CharField(widget=forms.PasswordInput())
email = forms.CharField(widget=forms.EmailInput())
class Meta:
model = Customer
fields =["full_name", "username", "email", "password"]
def clean_username(self):
uname = self.cleaned_data.get('username')
if User.objects.filter(username = uname).exists():
raise forms.ValidationError(_('Customer with this username already exists'), code='invalid')
return uname
def __init__(self, *args, **kwargs):
super(RegisterForm, self).__init__(*args, **kwargs) # Call to ModelForm constructor
self.fields['username'].widget.attrs['style'] = 'width:500px; height:40px;'
self.fields['password'].widget.attrs['style'] = 'width:500px; height:40px;'
self.fields['email'].widget.attrs['style'] = 'width:500px; height:40px;'
self.fields['full_name'].widget.attrs['style'] = 'width:500px; height:40px;'
我无法在上面的代码上显示错误消息Customer with this username already exists
views.py
from django.shortcuts import render, redirect
from django.views.generic import CreateView, View, FormView
from django.contrib.auth import authenticate, login, logout
from django.urls import reverse_lazy
from .forms import *
# Create your views here.
class customerRegister(CreateView):
template_name = "register.html"
form_class = RegisterForm
success_url = reverse_lazy("main_app:base")
def form_valid(self, form):
username = form.cleaned_data.get("username")
email = form.cleaned_data.get("email")
password = form.cleaned_data.get("password")
user = User.objects.create_user(username, email, password)
form.instance.user = user
login(self.request, user)
return super().form_valid(form)
def get_success_url(self):
if "next" in self.request.GET:
next_url = self.request.GET.get("next")
return next_url
else:
return self.success_url
注册.html
<body style="background-color: #95a5a6">
{% if error %}
<div class="alert alert-dismissible alert-danger">
<button type="button" class="btn-close" data-bs-dismiss="alert"></button>
<strong>Oh snap!</strong>{{form.non_field_errors}}
</div>
{% endif %}
<div class="container-register mx-auto">
<form action="{% url 'account:register' %}" method="post">
{% csrf_token %}
<fieldset>
<h2 class="text-center" style="margin-top: 50px">Register</h2>
<div class="form-group">
<label class="col-form-label mt-4" for="inputDefault">Full Name*</label><br>
{{form.full_name}}<br>
</div>
<div class="form-group">
<label class="col-form-label mt-4" for="inputDefault">Username*</label><br>
{{form.username}}<br>
</div>
<div class="form-group">
<label for="exampleInputEmail1" class="form-label mt-4 ">Email address*</label><br>
{{form.email}}<br>
<small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
</div>
<div class="form-group">
<label for="exampleInputPassword1" class="form-label mt-4">Password*</label><br>
{{form.password}}<br>
</div>
<br/>
<div class="text-center">
<button type="submit" class="btn btn-lg btn-primary">Register</button>
</div>
</fieldset>
</form>
<hr>
<h5 class="text-center" style="margin-top: 50px">Already Registered?<a class="nav-link" href="{% url 'account:login'%}">Log in</a></h5>
</div>
</body>
在您的模板中，您有不存在的{% if error %}，因为您没有将模板上下文传递error。在模板if内，您将访问{{form.non_field_errors}}如果出现错误，这些内容将存在。
所以它应该是这样{% if form.non_field_errors %}的：
{% if form.non_field_errors %}
<div class="alert alert-dismissible alert-danger">
<button type="button" class="btn-close" data-bs-dismiss="alert"></button>
<strong>Oh snap!</strong>{{form.non_field_errors}}
</div>
{% endif %}
请参阅相关的StackOverflow帖子 此处 自定义电子邮件错误消息。