I have found the solution (even if i dont understand why)
it is not an issue due to pillow but the file itself.
if my function is like
is_image(myfile):
myfile.read()
I will have the same issue.
The file pointer/cursor needs to be reseted to the first position with
myfile.seek(0)
it seems like when i open the file with PIL, the file pointer does not come
back to the position 0 by itself.
So I have to change my save_file function to :
def save_file(file,owner):
data ={}
pic = None
is_image(file)
* file.seek(0)*
data['image'] = file
data['owner'] = owner
s = ImageSerializer(data=data)
if s.is_valid():
logger.error("image {filename} saved".format(filename = file.name))
pic = s.save()
else :
logger.error("image {filename} ERROR {errors}".format(filename =
file.name, errors = s.errors))
return pic
Cyril
Le lundi 7 décembre 2020 à 12:36:25 UTC, cyril moreau a écrit :
> Hi Everybody,
>
> I try to use the serializer to save an image in my model as following:
>
> def save_file(file,owner):
> data ={}
> pic = None
> myfile = file
> is_image(myfile)
> data['image'] = file
> data['owner'] = owner
> s = ImageSerializer(data=data)
> if s.is_valid():
> logger.error("image {filename} saved".format(filename = file.name
> ))
> pic = s.save()
> else :
> logger.error("image {filename} ERROR {errors}".format(filename =
> file.name, errors = s.errors))
> return pic
>
> Model :
> class Image(models.Model):
> image = models.ImageField(upload_to=path_and_rename, max_length=500)
> owner = models.CharField(max_length=100)
>
> Serializer :
> class ImageSerializer(serializers.ModelSerializer):
> class Meta:
> model = Image
> fields = '__all__'
>
> The save function does not work because of the call of the function
> is_image(file) :
> from PIL import Image
> def is_image(myfile):
> try:
> im = Image.open(myfile)
> im.verify()
> except Exception:
> raise Execption('Invalid image')
>
> When I call this function the serializer fails as following :
> "POST /image HTTP/1.1" 200 22897
> image single_file.jpg ERROR {'image': [ErrorDetail(string='Upload a valid
> image. The file you uploaded was either not an image or a corrupted
> image.', code='invalid_image')]}
>
> If I comment the call, the serializer save the file correctly.
>
> According to im.verify(), the file is a valid image. but then it seems
> like Pillow corrupt the file somehow and the serializer can not save it.
>
> I have tried im.load(), im.close(), im.fp.close()
> Nothing works.
>
> Can someone help me? Where is my mistake?
>
> Thank you
>
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