Key_error 在 Django 表單中使用 self.cleaned_data[]

Question

在我的 forms.py 中，我不斷收到下面的email = self.cleaned_data["email"]的 key_error。 我還嘗試添加電子郵件驗證或 clean_email 方法，因為不知何故，key_error 似乎僅在我嘗試使用無效電子郵件地址注冊時發生。 添加def clean_email()是正確的方法嗎？ 如果是這樣，我班級中的 forms.py 是否適合這樣做？

表格.py：

from django import forms
from django.contrib.auth.models import User


class RegisterForm(forms.Form):
    first_name = forms.CharField(widget=forms.TextInput(attrs={'class': "form-control", 'placeholder': "First Name", 'autocomplete': "nope"}), label="First name", max_length=64, required=True)
    last_name = forms.CharField(widget=forms.TextInput(attrs={'class': "form-control", 'placeholder': "Last Name", 'autocomplete': "new-password"}), label="Last name", max_length=64, required=True)
    email = forms.EmailField(widget=forms.TextInput(attrs={'class': "form-control", 'placeholder': "Email", 'autocomplete': "new-password"}), label="Email", max_length=132, required=True)
    password = forms.CharField(label="Password", max_length=32, widget=forms.PasswordInput(attrs={'class': "form-control", 'placeholder': "Password"}))
    confirmation = forms.CharField(label="Confirmation", max_length=32, widget=forms.PasswordInput(attrs={'class': "form-control", 'placeholder': "Confirm"}))

    def clean(self):
        email = self.cleaned_data["email"]
        if User.objects.filter(username=email).exists():
          raise forms.ValidationError(u'Email "%s" is already in use.' % email)

        password = self.cleaned_data["password"]
        confirmation = self.cleaned_data["confirmation"]
        if password != confirmation:
            raise forms.ValidationError("Password and confirmation do not match!")

views.py 中對應的方法是：

from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render, redirect
from django.contrib.auth.models import User
from django.contrib.auth import authenticate, login
from django.contrib import messages

def register_client(request):
  if request.method == "POST":
    form = RegisterForm(request.POST)

    if form.is_valid():
      email = form.cleaned_data['email']
      password = form.cleaned_data['password']
      user = User.objects.create_user(email, email, password)
      user.first_name = form.cleaned_data['first_name']
      user.last_name = form.cleaned_data['last_name']
      user.save()

  else:
    form = RegisterForm()

  return render(request, "pizza/register.html", {'form': form})

注冊.html：

{% extends "pizza/outerlayout.html" %}

{% block title %}
Register for Pizza
{% endblock %}

{% block body %}

<form action="{% url 'register_client' %}" class="form-signin" method="post" autocomplete="false">
  {% csrf_token %}
  {% load static %}
  <img class="mb-4" src="{% static 'pizza/pizza.jpg' %}" alt="" width="72" height="72">
  <h1 class="h3 mb-3 font-weight-normal">Register as Pizza Client</h1>
  {{ form }}

  <button class="btn btn-lg btn-primary btn-block" type="submit">Register</button>

</form>

{% endblock %}

追溯：

Internal Server Error: /register_client
Traceback (most recent call last):
  File "/home/anna/py3_cs50W/lib/python3.6/site-packages/django/core/handlers/exception.py", line 35, in inner
    response = get_response(request)
  File "/home/anna/py3_cs50W/lib/python3.6/site-packages/django/core/handlers/base.py", line 128, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/anna/py3_cs50W/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/mnt/c/git/project3/orders/views.py", line 43, in register_client
    if form.is_valid():
  File "/home/anna/py3_cs50W/lib/python3.6/site-packages/django/forms/forms.py", line 179, in is_valid
    return self.is_bound and not self.errors
  File "/home/anna/py3_cs50W/lib/python3.6/site-packages/django/forms/forms.py", line 174, in errors
    self.full_clean()
  File "/home/anna/py3_cs50W/lib/python3.6/site-packages/django/forms/forms.py", line 377, in full_clean
    self._clean_form()
  File "/home/anna/py3_cs50W/lib/python3.6/site-packages/django/forms/forms.py", line 404, in _clean_form
    cleaned_data = self.clean()
  File "/mnt/c/git/project3/orders/forms.py", line 14, in clean
    email = self.cleaned_data["email"]
KeyError: 'email'

感謝 vm 並為基本問題道歉 - 我是新手。

Answer 1

嘗試這個：

def clean_email(self):   #add clean_email
    email = self.cleaned_data["email"]
    if User.objects.filter(username=email).exists():
      raise forms.ValidationError(u'Email "%s" is already in use.' % email)

為密碼驗證制作另一個def clean_password()