[英]Django "ImageField" form value is None
我正在尝试为用户实现个人资料图片字段。 以下是我尝试的实现的每个文件的代码forms.py
、 models.py
、 views.py
和urls.py
。
我使用IDE(vscode)调试django,并在下面views.py
中的user.avatar = form.cleaned_data['avatar']
行上放置了一个断点,以快速检查cleaned_data['avatar']
是否填充为用户输入,正如我所料。
但是,即使我在 url 上上传了一个文件,提交后,该行显示None
而期望一个图像对象,当然它不会保存任何内容,因此也不会更改数据库。
#
# forms.py
# accounts/forms.py
#
from accounts.models import UserProfile
# ..
class UserProfileForm(forms.ModelForm):
avatar = forms.ImageField(label=_('Avatar'))
class Meta:
model = UserProfile
fields = [
'avatar',
]
def __init__(self, *args, **kwargs):
super(UserProfileForm, self).__init__(*args, **kwargs)
self.fields['avatar'].required = False
#
# models.py
# accounts/models.py
#
from django.contrib.auth.models import User
from PIL import Image
class UserProfile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
avatar = models.ImageField(upload_to="images", blank=True, null=True)
# note: I also did "python manage.py makemigrations accounts; python manage.py migrate accounts;"
#
# views.py
# accounts/views.py
#
class UserProfileView(FormView):
template_name = 'accounts/profile/change_picture.html'
form_class = UserProfileForm
def form_valid(self, form):
user = self.request.user
user.avatar = form.cleaned_data['avatar']
user.save()
messages.success(self.request, _('Profile picture has been successfully updated'))
return redirect('accounts:change_profile_picture')
#
# urls.py
# accounts/urls.py
#
from .views import UserProfileView
urlpatterns = [
# ..
path('change/profile_picture/', UserProfileView.as_view(), name='change_profile_picture'),
]
代码有什么问题? 谢谢。
根据要求,html accounts/profile/change_picture.html
{% extends 'layouts/html.html' %}
{% load static %}
{% load bootstrap4 %}
{% load i18n %}
{% block content %}
{% include 'head.html' %}
<body>
{% include 'navbar.html' %}
<div id="content" name="content" class="main container">
<div class="w-100 p-3"></div>
<h2>{% trans 'Change profile picture' %}</h2>
<form method="post">
{% csrf_token %}
{% bootstrap_form form %}
<button class="btn btn-success">{% trans 'Change' %}</button>
</form>
<div class="w-100 p-3"></div>
</div>
{% include 'footer.html' %}
</body>
{% endblock %}
将enctype="multipart/form-data"
添加到表单中:
<form method="post" enctype="multipart/form-data">
{% csrf_token %}
{% bootstrap_form form %}
<button class="btn btn-success">{% trans 'Change' %}</button>
</form>
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