我有一个Document的模型（名为FileField）。如果我尝试创建所述模型的实例，则在尝试保存时会得到TypeError exception。
models.py
class Document(CompanyModel):
def __unicode__(self):
return self.name
file = models.FileField()
issue = models.ForeignKey(Issue)
name = models.CharField(max_length=50)
class CompanyModel(models.Model):
id_number = models.PositiveIntegerField(blank=True)
company = models.ForeignKey(Company)
def get_next_nr(self):
current_max = self.__class__.objects.filter(company=self.company)\
.aggregate(models.Max('id_number'))['id_number__max'] or 0
return current_max + 1
def save(self, *args, **kwargs):
if self.id_number is None:
# Model is being created
self.id_number = self.get_next_nr()
super(CompanyModel, self).save(*args, **kwargs)
class Meta:
abstract = True
unique_together = ('id_number', 'company')
views.py
@csrf_exempt
@login_required
def image_upload(request):
upload_to = getattr(settings, 'FROALA_UPLOAD_PATH', 'editor/images/')
if 'image' in request.POST:
data = request.POST['image'] # Getting the object from the post request
decoded_data = data.split(',')[1].decode('base64')
path = default_storage.save(
os.path.join(upload_to, 'pasted_image'), ContentFile(decoded_data))
link = getattr(settings, 'SITE_URL') + default_storage.url(path)
company = request.user.employee.company
return HttpResponse(
json.dumps({'link': link}), content_type="application/json")
if 'file' in request.FILES:
the_file = request.FILES['file']
allowed_types = [
'image/jpeg', 'image/jpg', 'image/pjpeg',
'image/x-png', 'image/png', 'image/gif']
if not the_file.content_type in allowed_types:
return HttpResponse(
json.dumps({'error': _('You can only upload images.')}),
content_type="application/json")
# Other data on the request.FILES dictionary:
# filesize = len(file['content'])
# filetype = file['content-type']
path = default_storage.save(
os.path.join(upload_to, the_file.name), the_file)
link = getattr(settings, 'SITE_URL') + default_storage.url(path)
# return JsonResponse({'link': link})
company = request.user.employee.company
url_path = default_storage.url(path)
doc_id = 0
try:
doc = Document.objects.create(
file=url_path[1:],
issue=Issue.objects.get(
company=company,
id_number=int(request.POST.get('issue_id', None))),
name=the_file.name,
company=company)
doc_id = doc.id_number
except:
pass
return HttpResponse(
json.dumps({'link': link, 'doc_id': doc_id}),
content_type="application/json")
这是我尝试保存实例时获得的异常的堆栈跟踪：
堆栈跟踪
File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in get_response
132. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Library/Python/2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view
58. return view_func(*args, **kwargs)
File "/Library/Python/2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
22. return view_func(request, *args, **kwargs)
File "/Users/alejandrodejesus/Projects/NeosGoal/froala_editor/views.py" in image_upload
57. company=company)
File "/Library/Python/2.7/site-packages/django/db/models/manager.py" in manager_method
127. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Library/Python/2.7/site-packages/django/db/models/query.py" in create
348. obj.save(force_insert=True, using=self.db)
File "/Users/alejandrodejesus/Projects/NeosGoal/NeosGoal/models.py" in save
19. super(CompanyModel, self).save(*args, **kwargs)
File "/Library/Python/2.7/site-packages/django/db/models/base.py" in save
710. force_update=force_update, update_fields=update_fields)
File "/Library/Python/2.7/site-packages/django/db/models/base.py" in save_base
747. update_fields=update_fields, raw=raw, using=using)
File "/Library/Python/2.7/site-packages/django/dispatch/dispatcher.py" in send
201. response = receiver(signal=self, sender=sender, **named)
File "/Users/alejandrodejesus/Projects/NeosGoal/NeosGoal/signals.py" in send_socket
11. publish_event(event_name, connection.tenant, instance=instance)
File "/Users/alejandrodejesus/Projects/NeosGoal/NeosGoal/sockets.py" in publish_event
34. model_to_json = json.dumps(instance_data, cls=DjangoJSONEncoder)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py" in dumps
250. sort_keys=sort_keys, **kw).encode(obj)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/encoder.py" in encode
207. chunks = self.iterencode(o, _one_shot=True)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/encoder.py" in iterencode
270. return _iterencode(o, 0)
File "/Library/Python/2.7/site-packages/django/core/serializers/json.py" in default
112. return super(DjangoJSONEncoder, self).default(o)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/encoder.py" in default
184. raise TypeError(repr(o) + " is not JSON serializable")
Exception Type: TypeError at /froala_editor/image_upload/
Exception Value: <FieldFile: uploads/editor/images/Screen%20Shot%202016-03-02%20at%202.39.12%20PM.png> is not JSON serializable
我在Django文档（https://docs.djangoproject.com/es/1.9/ref/models/fields/#filefield）中读到，如果我尝试使用FileField作为主键，我会收到类型错误，但我不认为是这种情况。我错了吗？
对我缺少的东西有任何想法吗？