Question

将ImageFile上传到Django REST后端时遇到以下错误：

substring-before(
  substring-after(//app:ApplicationStatusNotificationRequestMessage/
                    app:Data[contains(., 'applicationId')]/text(), 
         'applicationId&quot;:&quot;'), 
  '&quot;,')

我的观点：

Internal Server Error: /user/addimage/
Traceback (most recent call last):
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/core/handlers/exception.py", liner
    response = get_response(request)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/core/handlers/base.py", line 187,e
    response = self.process_exception_by_middleware(e, request)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/core/handlers/base.py", line 185,e
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/views/decorators/csrf.py", line 5w
    return view_func(*args, **kwargs)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/views/generic/base.py", line 68, w
    return self.dispatch(request, *args, **kwargs)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/rest_framework/views.py", line 489, in dh
    response = self.handle_exception(exc)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/rest_framework/views.py", line 449, in hn
    self.raise_uncaught_exception(exc)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/rest_framework/views.py", line 486, in dh
    response = handler(request, *args, **kwargs)
  File "/home/neuron/genie2/user_profiles/views.py", line 92, in post
    profile_stored = file_system_instance.save('profile_' + data['first_name'] + ".jpg", request.FIL)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/core/files/storage.py", line 54, e
    return self._save(name, content)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/core/files/storage.py", line 351,e
    for chunk in content.chunks():
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/core/files/base.py", line 81, in s
    data = self.read(chunk_size)
  File "/home/neuron/genie2_env/lib/python3.4/site-packages/django/core/files/utils.py", line 16, in>
    read = property(lambda self: self.file.read)
AttributeError: 'NoneType' object has no attribute 'read'
[01/Aug/2017 14:14:22] "POST /user/addimage/ HTTP/1.1" 500 18686

我是否完全错了？如果是，请建议更好的解决方案。

Answer 1

Django REST Framework 3弃用了request.FILES选项。您可以对imagefield使用request.data。

更改

request.FILES.get('profile_pic')

到

request.data.get('profile_pic')

如果您定义了ImageField或FileField，则无需手动上传文件。 Django会为你做这件事

而不是这段代码，

profile_img_instance = ImageFile(request.FILES.get('profile_pic'))
file_system_instance = FileSystemStorage(location=settings.MEDIA_ROOT) 
instance.profile_pic = file_system_instance.save('profile_' + data['first_name'] + ".jpg", profile_img_instance)

直接将图像分配到字段

instance.profile_pic = request.data.get('profile_pic')

还要确保您的模型字段看起来像这样，

class Model(models.Model):
   profile_pic = models.ImageField(upload_to='profile')

Django Multipart图片上传：＆＃39; NoneType＆＃39;对象没有属性＆＃39; read＆＃39;

1 个答案: