Python 如何将InMemoryUploadedFile放入文件字段？

上下文：

pip冻结

：

asgiref==3.2.10
dist==1.0.3
Django==3.1.2
PyMySQL==0.10.1
pytz==2020.1
sqlparse==0.4.1

python--version：

Python 3.6.7

email.html

：

<form action="" method="post" enctype="multipart/form-data">
    {% csrf_token %}
    {{ recipient_form.as_p }}
    {{ body_form.as_p }}
    {{ attachments_form.as_p }}
    <input type="submit" value="Submit">
</form>

views.py

：

def index(request, email_id=None):
    context = {
       'bucket': settings.BUCKET_URL, # where files are stored
       'recipient_form': RecipientForm(prefix='recipient'),
       'body_form': BodyForm(prefix="body"),
       'attachments_form': AttachmentForm(prefix='attachments')
    }
    if email_id is not None and Email.objects.filter(pk=email_id).exists():
       email = Email.objects.get(pk=email_id) 
       
       if request.method == 'POST':
           recipient_form = RecipientForm(request.POST, prefix='recipient')
           body_form = BodyForm(request.POST, prefix='body')
           attachments_form = AttachmentForm(request.FILES, prefix='attachments')
           if recipient_form.is_valid() and body_form.is_valid() and attachments_form.is_valid():
              # here is where things got messy..
              recipient = recipient_form
              recipient.email = email
              recipient.save()

              body = body_form
              body.email = email
              body.save()

              attachments = attachments_form
              attachments.email = email
              attachments.save()

    return render(request, 'email.html', context)

forms.py

urlpatterns = [
    path('email/<int:email_id>', email.index, name='email')
]

# ...
class AttachmentForm(ModelForm):
    class Meta
        model = Attachment
        fields = ['file']
# ...

#...
def attachment_handler(instance, filename):
    upload_to = 'attachments'

    return os.path.join(upload_to, filename)

class Attachment(models.Model):
    email = models.ForeignKey(Email, on_delete=models.CASCADE)
    file = models.FileField(upload_to=attachment_handler, null=True, blank=True)
    datestamp = models.DateTimeField(auto_now_add=True, null=True)
#...

models.py

urlpatterns = [
    path('email/<int:email_id>', email.index, name='email')
]

# ...
class AttachmentForm(ModelForm):
    class Meta
        model = Attachment
        fields = ['file']
# ...

#...
def attachment_handler(instance, filename):
    upload_to = 'attachments'

    return os.path.join(upload_to, filename)

class Attachment(models.Model):
    email = models.ForeignKey(Email, on_delete=models.CASCADE)
    file = models.FileField(upload_to=attachment_handler, null=True, blank=True)
    datestamp = models.DateTimeField(auto_now_add=True, null=True)
#...

目标： 最好通过

ModelForm

上传

文件字段中的多个文件。如果不可能，每个
附件只能有一个

到目前为止：
我可以通过
ModelForm
上传一个没有错误的文件，但它不会像Django的内置
admin
面板中所示那样持续存在。我可以对
ImageField
执行相同的操作，但我需要
FileField
才能工作

问题似乎在于将文件上传到模型的FileField中，但我不知道为什么

打印（请求文件）

MultiValueDict:{'attachment-file'：[]}>

尝试：


收益率：
“非类型”对象没有属性“文件”
收益率：
'MultiValueDict'对象没有属性“save”