Python 关闭文件上的I/O操作:Django Imagekit&;枕头
我正在使用django imagekit和pillow上传图像,这在django 1.7中运行良好。最近我们转到django 1.10,现在图像上传不起作用。代码片段是:Python 关闭文件上的I/O操作:Django Imagekit&;枕头,python,django,python-imaging-library,django-imagekit,Python,Django,Python Imaging Library,Django Imagekit,我正在使用django imagekit和pillow上传图像,这在django 1.7中运行良好。最近我们转到django 1.10,现在图像上传不起作用。代码片段是: class Images(models.Model): image = ProcessedImageField(upload_to='main', processors=[ResizeToCover(640, 640)],
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.
生成中的文件“C:\Python35\lib\site packages\imagekit\specs\\uuuu init\uuuu.py”
149img=开放式图像(self.source)
打开图像中的文件“C:\Python35\lib\site packages\pilkit\utils.py”
21目标搜索(0)
在处理上述异常(对关闭的文件执行I/O操作)期间,发生了另一个异常:
文件“C:\Python35\lib\site packages\django\core\handlers\exception.py”位于内部
39响应=获取响应(请求)
文件“C:\Python35\lib\site packages\django\core\handlers\base.py”位于\u legacy\u get\u响应中
249响应=自我。获取响应(请求)
get响应中的文件“C:\Python35\lib\site packages\django\core\handlers\base.py”
187response=self.process\u异常\u由\u中间件(e,请求)
get响应中的文件“C:\Python35\lib\site packages\django\core\handlers\base.py”
185响应=包装的回调(请求,*回调参数,**回调参数)
视图中的文件“C:\Python35\lib\site packages\django\contrib\auth\decorators.py”
23返回视图功能(请求,*args,**kwargs)
set\u徽标中的文件“C:\Users\sp\industryo\nodes\views.py”
173i=Images.objects.create(image=image,user=user,image\u缩略图=image)
manager\u方法中的文件“C:\Python35\lib\site packages\django\db\models\manager.py”
85返回getattr(self.get_queryset(),name)(*args,**kwargs)
创建中的文件“C:\Python35\lib\site packages\django\db\models\query.py”
399对象保存(force_insert=True,using=self.db)
保存中的文件“C:\Python35\lib\site packages\django\db\models\base.py”
796强制更新=强制更新,更新字段=更新字段)
save\u base中的文件“C:\Python35\lib\site packages\django\db\models\base.py”
824更新=自我。保存表格(原始、cls、强制插入、强制更新、使用、更新字段)
保存表格中的文件“C:\Python35\lib\site packages\django\db\models\base.py”
908结果=self.\u do\u insert(cls.\u base\u manager,using,fields,update\u pk,raw)
文件“C:\Python35\lib\site packages\django\db\models\base.py”位于\u do\u insert
947使用=使用,原始=原始)
manager\u方法中的文件“C:\Python35\lib\site packages\django\db\models\manager.py”
85返回getattr(self.get_queryset(),name)(*args,**kwargs)
文件“C:\Python35\lib\site packages\django\db\models\query.py”位于\u insert
1043return query.get\u编译器(using=using).execute\u sql(return\u id)
execute\U sql中的文件“C:\Python35\lib\site packages\django\db\models\sql\compiler.py”
1053对于sql,self.as_sql()中的参数为:
as\U sql中的文件“C:\Python35\lib\site packages\django\db\models\sql\compiler.py”
1006对于self.query.objs中的obj
文件“C:\Python35\lib\site packages\django\db\models\sql\compiler.py”
1006对于self.query.objs中的obj
文件“C:\Python35\lib\site packages\django\db\models\sql\compiler.py”
1005[self.prepare_值(字段,self.pre_保存值(字段,对象))用于字段中的字段]
文件“C:\Python35\lib\site packages\django\db\models\sql\compiler.py”在pre\u save\val中
955返回字段。预保存(obj,add=True)
预保存中的文件“C:\Python35\lib\site packages\django\db\models\fields\files.py”
292file.save(file.name,file,save=False)
保存中的文件“C:\Python35\lib\site packages\imagekit\models\fields\files.py”
12内容=生成(规范)
生成中的文件“C:\Python35\lib\site packages\imagekit\utils.py”
134content=generator.generate()
生成中的文件“C:\Python35\lib\site packages\imagekit\specs\\uuuu init\uuuu.py”
153self.source.open()
打开文件“C:\Python35\lib\site packages\django\db\models\fields\files.py”
81self.file.open(模式)
打开文件“C:\Python35\lib\site packages\django\core\files\uploadedfile.py”
96self.file.seek(0)
异常类型:ValueError位于/nodes/set_徽标/
异常值:关闭文件上的I/O操作。
这里可以做些什么。我需要在包中进行更改吗?救命啊 在最新版本中,Imagekit和枕头的互动似乎不是很好。可以看到的问题发生了,因为PIL无法直接处理imagekit发送的文件 因此,对于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