Question

我试图在我的模板 (register.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“如何显示此表单中已存在的电子邮件”

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 Customer with this username already exists

上显示错误消息

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

register.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>

Answer 1

在您的模板中，您有 {% if error %}，它不存在，因为您没有传递模板上下文 error。在模板 if 中，您将访问 {{form.non_field_errors}}，如果出现错误，它将存在。

所以它应该是 {% if form.non_field_errors %} 像这样：

  {% 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 StackOverflow 帖子 here 以自定义电子邮件错误消息。

模板不显示验证错误（Django）

1 个答案: