【发布时间】：2023-03-28 01:44:01
【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 ......
标签： python django database forms sqlite