我正在使用django imagekit和枕头上传在django 1.7中运行良好的图像。最近我们转到了django 1.10，现在图像上传不起作用。代码段是：
class Images(models.Model):
image = ProcessedImageField(upload_to='main',
processors=[ResizeToCover(640, 640)],
format='JPEG',
options={'quality': 90})
image_thumbnail = ProcessedImageField(upload_to='thumbnails',
processors=[SmartResize(128, 128)],
format='JPEG',
options={'quality': 70})
user = models.ForeignKey(User)
def upload_image(self, image, user):
if len(image.name) > 30:
image.name = image.name[:20]
i = Images.objects.create(image=image, image_thumbnail=image, user=user)
return i
回溯是：
File "C:\Python35\lib\site-packages\imagekit\specs\__init__.py" in generate
149. img = open_image(self.source)
File "C:\Python35\lib\site-packages\pilkit\utils.py" in open_image
21. target.seek(0)
During handling of the above exception (I/O operation on closed file.), another exception occurred:
File "C:\Python35\lib\site-packages\django\core\handlers\exception.py" in inner
39. response = get_response(request)
File "C:\Python35\lib\site-packages\django\core\handlers\base.py" in _legacy_get_response
249. response = self._get_response(request)
File "C:\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "C:\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Python35\lib\site-packages\django\contrib\auth\decorators.py" in _wrapped_view
23. return view_func(request, *args, **kwargs)
File "C:\Users\sp\industryo\nodes\views.py" in set_logo
173. i = Images.objects.create(image=image, user=user, image_thumbnail=image)
File "C:\Python35\lib\site-packages\django\db\models\manager.py" in manager_method
85. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python35\lib\site-packages\django\db\models\query.py" in create
399. obj.save(force_insert=True, using=self.db)
File "C:\Python35\lib\site-packages\django\db\models\base.py" in save
796. force_update=force_update, update_fields=update_fields)
File "C:\Python35\lib\site-packages\django\db\models\base.py" in save_base
824. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "C:\Python35\lib\site-packages\django\db\models\base.py" in _save_table
908. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "C:\Python35\lib\site-packages\django\db\models\base.py" in _do_insert
947. using=using, raw=raw)
File "C:\Python35\lib\site-packages\django\db\models\manager.py" in manager_method
85. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python35\lib\site-packages\django\db\models\query.py" in _insert
1043. return query.get_compiler(using=using).execute_sql(return_id)
File "C:\Python35\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
1053. for sql, params in self.as_sql():
File "C:\Python35\lib\site-packages\django\db\models\sql\compiler.py" in as_sql
1006. for obj in self.query.objs
File "C:\Python35\lib\site-packages\django\db\models\sql\compiler.py" in <listcomp>
1006. for obj in self.query.objs
File "C:\Python35\lib\site-packages\django\db\models\sql\compiler.py" in <listcomp>
1005. [self.prepare_value(field, self.pre_save_val(field, obj)) for field in fields]
File "C:\Python35\lib\site-packages\django\db\models\sql\compiler.py" in pre_save_val
955. return field.pre_save(obj, add=True)
File "C:\Python35\lib\site-packages\django\db\models\fields\files.py" in pre_save
292. file.save(file.name, file, save=False)
File "C:\Python35\lib\site-packages\imagekit\models\fields\files.py" in save
12. content = generate(spec)
File "C:\Python35\lib\site-packages\imagekit\utils.py" in generate
134. content = generator.generate()
File "C:\Python35\lib\site-packages\imagekit\specs\__init__.py" in generate
153. self.source.open()
File "C:\Python35\lib\site-packages\django\db\models\fields\files.py" in open
81. self.file.open(mode)
File "C:\Python35\lib\site-packages\django\core\files\uploadedfile.py" in open
96. self.file.seek(0)
Exception Type: ValueError at /nodes/set_logo/
Exception Value: I/O operation on closed file.
在这里能做什么。我需要更改包吗？救命啊！
最佳答案
在最新版本中，Imagekit和枕头的交互效果似乎不太好。可以看到的问题是，由于PIL无法直接处理imagekit发送的文件。
因此，为了种植和改变大小和质量，我们完全转向了PIL。
def upload_image1(self, image, user, name, image1):
if len(image1.name) > 30:
image1.name = image1.name[:20]
i = Images.objects.create(image=image1, user=user)
new_image_io = BytesIO()
image.save(new_image_io, format='JPEG')
i.image_thumbnail.save(name, content=ContentFile(new_image_io.getvalue()))
return i
要创建缩略图，我们必须打开图像并将其保存为：
new_image_io = BytesIO()
image.save(new_image_io, format='JPEG')
i.image_thumbnail.save(name, content=ContentFile(new_image_io.getvalue()))
希望有帮助！
关于python - 对关闭文件的I/O操作:Django Imagekit＆Pillow，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/39242871/