Django:表单中的电子邮件字段返回“此字段不能为空/此字段不能为空”,即使其中有地址
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【中文标题】Django:表单中的电子邮件字段返回“此字段不能为空/此字段不能为空”,即使其中有地址【英文标题】:Django: Email field in form returning 'this field cannot be null/this field cannot be blank' even though there's an address in it 【发布时间】:2015-12-25 04:15:55 【问题描述】:在开始之前,我查看了类似的错误,但似乎找不到问题所在。
背景:我正在 Django 中使用 model.py 创建一个注册表单。我有在我的开发环境中运行的表单。一旦我将数据输入到表单中,它应该将其保存在 sqlite3 db 中。但是目前,当我完成填写表格时,我看到了两个问题。这些如下
问题: 1)尽管在“电子邮件”字段中有一个电子邮件地址,但它提出了“此字段不能为空”。因此,我在我的 models.py 文件中添加“null=true”以用于电子邮件。完成此操作并重试后,我得到: 2) 另一个错误说“此字段不能为空”。然后我在我的 models.py 文件中为电子邮件添加 'blank=true'。 这使我能够完成表格并注册数据。但是现在,我面临着问题 3 3)当我进入数据库时,点击查看谁注册了,它说'none'应该在哪里。当我点击“无”时,我看到以下错误(我的代码如下):
TypeError at .............
coercing to Unicode: need string or buffer, NoneType found
Request Method: GET
Request URL: ......
Django Version: 1.8.2
Exception Type: TypeError
Exception Value:
coercing to Unicode: need string or buffer, NoneType found
Exception Location: /Library/Python/2.7/site-packages/Django-1.8.2-py2.7.egg/django/utils/encoding.py in force_text, line 92
Python Executable: /usr/bin/python
Python Version: 2.7.6
Python Path:
['/Users/Desktop/Website/booksrc',
'/Library/Python/2.7/site-packages/pip-7.1.0-py2.7.egg',
'/Library/Python/2.7/site-packages/Django-1.8.2-py2.7.egg',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC',
'/Library/Python/2.7/site-packages']
Server time: Mon, 28 Sep 2015 00:19:11 +0000
Error during template rendering
In template /Library/Python/2.7/site-packages/Django-1.8.2-py2.7.egg/django/contrib/admin/templates/admin/change_form.html, error at line 21
coercing to Unicode: need string or buffer, NoneType found
11 % block coltype %colM% endblock %
12
13 % block bodyclass % block.super app- opts.app_label model- opts.model_name change-form% endblock %
14
15 % if not is_popup %
16 % block breadcrumbs %
17 <div class="breadcrumbs">
18 <a href="% url 'admin:index' %">% trans 'Home' %</a>
19 › <a href="% url 'admin:app_list' app_label=opts.app_label %"> opts.app_config.verbose_name </a>
20 › % if has_change_permission %<a href="% url opts|admin_urlname:'changelist' %"> opts.verbose_name_plural|capfirst </a>% else % opts.verbose_name_plural|capfirst % endif %
21
› % if add %% trans 'Add' % opts.verbose_name % else %
original|truncatewords:"18"
% endif %
22 </div>
23 % endblock %
24 % endif %
25
26 % block content %<div id="content-main">
27 % block object-tools %
28 % if change %% if not is_popup %
29 <ul class="object-tools">
30 % block object-tools-items %
31 <li>
我还包含了我的代码:
models.py:
from django.db import models
# Create your models here.
class Register(models.Model):
Profession = models.CharField(max_length=120)
first_name = models.CharField(max_length=120)
last_name = models.CharField(max_length=120)
email = models.EmailField(max_length = 120, null=True, unique=True, blank=True)
phone_number = models.CharField(max_length=120)
instgram_ID = models.CharField(max_length=120, blank=True, null=True)
facebook_ID = models.CharField(max_length=120, blank=True, null=True)
twitter_ID = models.CharField(max_length=120, blank=True, null=True)
timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)
updated = models.DateTimeField(auto_now_add=False, auto_now=True)
def __unicode__(self):
return self.email
views.py:
from django.shortcuts import render
from .forms import RegisterForm
# Create your views here.
def home(request):
title = 'Welcome'
form = RegisterForm(request.POST or None)
context =
"title": title,
"form": form
if form.is_valid():
#form.save()
instance = form.save(commit=False)
first_name = form.cleaned_data.get("first_name")
if not first_name:
first_name = "New first name"
instance.first_name = first_name
#if not instance.full_name:
# instance.full_name = "Justin"
instance.save()
context =
"title": "Thank you"
return render(request, "home.html", context)
forms.py
from django import forms
from .models import Register
class RegisterForm(forms.ModelForm):
class Meta:
model = Register
fields = ['first_name', 'last_name', 'email', 'phone_number', 'instgram_ID', 'facebook_ID', 'twitter_ID']
def clean_email(self):
email = self.cleaned_data.get('email')
email_base, provider = email.split("@")
domain, extension = provider.split('.')
#if not domain = 'USC':
# raise forms.ValidationError("Please make sure you use your USC email.")
#if not extension == "edu":
# raise forms.ValidationError("Please use a valid .EDU email address")
#return email
def clean_full_name(self):
full_name = self.cleaned_data.get('full_name')
#write validation code.
return full_name
admin.py
from django.contrib import admin
# Register your models here.
from .forms import RegisterForm
from .models import Register
class RegisterAdmin(admin.ModelAdmin):
list_display = ["__unicode__", "timestamp", "updated"]
form = RegisterForm
#class Meta:
# model = Register
admin.site.register(Register, RegisterAdmin)
到目前为止,我已经调整了我认为可能是潜在错误的所有位,这可能是一个糟糕的举动,并且可能使事情变得比应有的更混乱,但是我(我希望)记得将无错误改回!请提供一个愚蠢的解释。我敢肯定,无论错误多么简单,我很可能仍会从中吸取教训。
非常感谢
【问题讨论】:
一篇非常长的帖子,但您遗漏了最重要的信息 TypeError ...... 【参考方案1】:你已经注释掉了 clean_email
方法的最后一行,它返回值,所以它返回 None。该方法的返回值用作字段的值,因此您确实需要返回实际的电子邮件值。
(实际上,当您在调试类似这样的内容并显示“电子邮件不能为空白”时,您应该首先调查为什么该字段被报告为空白,而不是修复模型以使其成为空白。)
【讨论】:
谢谢。我现在可以看到了。是的,我试图了解为什么该字段报告为空白,但我自己却无法看到这一点。已经编码了大约 7 个小时,所以当我了解某事的含义时,有时我会忘记,因为有这么多!非常感谢您的帮助。以上是关于Django:表单中的电子邮件字段返回“此字段不能为空/此字段不能为空”,即使其中有地址的主要内容,如果未能解决你的问题,请参考以下文章