I'm having problems with the standard Django FileField and tempfile.TemporaryFile. Whenever I try to save a FileField with the TemporaryFile, I get the "Unable to determine the file's size" error.
For example, given a model named Model, a filefield named FileField, and a temporaryfile named TempFile:
Model.FileField.save('foobar', django.core.files.File(TempFile), save=True)
This will give me the aforementioned error. Any thoughts?
I know this is a bit old but I've managed to save a base64 file (without having the actual file saved on the disk) by using the ContentFile class provided by Django.
According to the docs:
The ContentFile class inherits from File, but unlike File it operates on string content (bytes also supported), rather than an actual file.
The snippet below receives a base64 string, extract it's data and file extension and save it to an ImageField using the ContentFile class
import uuid
from django.core.files.base import ContentFile
def convert_b64data(b64data, filename):
file_format, imgstr = b64data.split(';base64,')
ext = file_format.split('/')[-1]
return {
'obj': base64.b64decode(imgstr),
'extension': ext,
}
b64data = request.data['b64file']
filename = str(uuid.uuid4())
file_data = convert_b64data(b64data, filename)
file_path = 'media/{}/{}.{}'.format(
user.code,
filename,
file_data['extension']
)
user.banner.save(file_path, ContentFile(file_data['obj']))
In newer versions of Django (I checked on 3.2), you just may need to wrap the file in a ContentFile.
from django.core.files.base import ContentFile
Model.FileField.save('foobar', ContentFile(file))