我在Django中的一个视图函数中收到一个内部服务器错误，它接受一个图像文件并将其保存到我的某个模型中。视图函数在开发中工作，但在生产中给我一个内部服务器错误。我试图在try / except块中包装失败的代码部分，但是它记录的例外只是说'__exit__'我不确定这意味着什么，或者它是什么样的异常是。我试着查看那个例外意味着什么，但找不到任何东西。是否与打开文件有关，并且有关闭它的问题？断开的视图函数的确切部分是它所说的......
if name == 'one':
trade_in.photo_one = file
查看
def edit_photos(request):
trade_in = account_trade_in(request)
if not trade_in:
return HttpResponse(json.dumps({'error': 'Something went wrong, unable to edit photos'}), content_type='application/json')
if request.method == 'POST':
try:
file = request.FILES['file']
name = request.POST['photo']
if name == 'one':
trade_in.photo_one = file
elif name == 'two':
trade_in.photo_two = file
elif name == 'three':
trade_in.photo_three = file
elif name == 'four':
trade_in.photo_four = file
elif name == 'five':
trade_in.photo_five = file
elif name == 'six':
trade_in.photo_six = file
trade_in.save()
except Exception as e:
logging.error(e)
return HttpResponse(json.dumps({'error': e}), content_type='application/json')
json_trade_in = json.dumps(trade_in.get_json())
return HttpResponse(json_trade_in, content_type='application/json')
模型
class TradeInDetails(models.Model):
account = models.OneToOneField(Account)
photo_one = StdImageField(upload_to=UploadToClassNameDirUUID(), blank=True, null=True,
variations={'thumbnail': (120, 120, True)})
photo_two = StdImageField(upload_to=UploadToClassNameDirUUID(), blank=True, null=True,
variations={'thumbnail': (120, 120, True)})
photo_three = StdImageField(upload_to=UploadToClassNameDirUUID(), blank=True, null=True,
variations={'thumbnail': (120, 120, True)})
photo_four = StdImageField(upload_to=UploadToClassNameDirUUID(), blank=True, null=True,
variations={'thumbnail': (120, 120, True)})
photo_five = StdImageField(upload_to=UploadToClassNameDirUUID(), blank=True, null=True,
variations={'thumbnail': (120, 120, True)})
photo_six = StdImageField(upload_to=UploadToClassNameDirUUID(), blank=True, null=True,
variations={'thumbnail': (120, 120, True)})
lender = models.CharField(max_length=255, null=True, blank=True)
amount_owed = models.CharField(max_length=255, null=True, blank=True)
year = models.CharField(max_length=255, null=True, blank=True)
mileage = models.CharField(max_length=255, null=True, blank=True)
make = models.ForeignKey('vehicle.VehicleMake', null=True, blank=True)
model = models.ForeignKey('vehicle.VehicleModel', null=True, blank=True)
class Meta:
verbose_name = 'Trade In Photos'
verbose_name_plural = 'Trade In Photos'
完整堆栈跟踪
Traceback (most recent call last):
File "/home/socialauto/social-auto-web/account/ajax_views.py", line 553, in edit_photos
trade_in.save()
File "/usr/local/lib/python3.4/dist-packages/django/db/models/base.py", line 708, in save
force_update=force_update, update_fields=update_fields)
File "/usr/local/lib/python3.4/dist-packages/django/db/models/base.py", line 736, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/usr/local/lib/python3.4/dist-packages/django/db/models/base.py", line 798, in _save_table
for f in non_pks]
File "/usr/local/lib/python3.4/dist-packages/django/db/models/base.py", line 798, in <listcomp>
for f in non_pks]
File "/usr/local/lib/python3.4/dist-packages/django/db/models/fields/files.py", line 311, in pre_save
file.save(file.name, file, save=False)
File "/home/socialauto/social-auto-web/third_party/stdimage/models.py", line 48, in save
self.render_variations()
File "/home/socialauto/social-auto-web/third_party/stdimage/models.py", line 58, in render_variations
self.render_variation(self.name, variation, replace, self.storage)
File "/home/socialauto/social-auto-web/third_party/stdimage/models.py", line 76, in render_variation
with Image.open(f) as img:
AttributeError: __exit__
标准图像模型方法投掷错误
@classmethod
def render_variation(cls, file_name, variation, replace=False,
storage=default_storage):
"""Render an image variation and saves it to the storage."""
variation_name = cls.get_variation_name(file_name, variation['name'])
if storage.exists(variation_name):
if replace:
storage.delete(variation_name)
logger.info('File "{}" already exists and has been replaced.')
else:
logger.info('File "{}" already exists.')
return variation_name
resample = variation['resample']
with storage.open(file_name) as f:
with Image.open(f) as img:
save_kargs = {}
file_format = img.format
if cls.is_smaller(img, variation):
factor = 1
while img.size[0] / factor \
> 2 * variation['width'] \
and img.size[1] * 2 / factor \
> 2 * variation['height']:
factor *= 2
if factor > 1:
img.thumbnail(
(int(img.size[0] / factor),
int(img.size[1] / factor)),
resample=resample
)
size = variation['width'], variation['height']
size = tuple(int(i) if i != float('inf') else i
for i in size)
if file_format == 'JPEG':
# http://stackoverflow.com/a/21669827
img = img.convert('RGB')
save_kargs['optimize'] = True
save_kargs['quality'] = 'web_high'
if size[0] * size[1] > 10000: # roughly <10kb
save_kargs['progressive'] = True
if variation['crop']:
img = ImageOps.fit(
img,
size,
method=resample
)
else:
img.thumbnail(
size,
resample=resample
)
with BytesIO() as file_buffer:
img.save(file_buffer, file_format, **save_kargs)
f = ContentFile(file_buffer.getvalue())
storage.save(variation_name, f)
return variation_name