无法腌制:属性查找内建函数失败 [英] Can't pickle : attribute lookup builtin.function failed
问题描述
我在下面收到错误消息,该错误仅在将 delay
添加到 process_upload
函数时才会发生,否则它将正常工作.
I'm getting the error below, the error only happens when I add delay
to process_upload
function, otherwise it works without a problem.
有人可以解释这个错误是什么,为什么会发生,并提供解决建议?
错误:
PicklingError at /contacts/upload/configurator/47/
Can't pickle <type 'function'>: attribute lookup __builtin__.function failed
这是视图
if request.method == 'POST':
form = ConfiguratorForm(data=request.POST)
# Send import to task.
process_upload.delay(upload_id=upload.id, form=form)
这是任务
@task
def process_upload(upload_id, form):
upload = Upload.objects.get(id=upload_id)
upload.process(form=form)
Upload.process在我的模型之内:
def process(self, form):
self.date_start_processing = timezone.now()
import_this(data=self.filepath, extra_fields=[
{'value': self.group_id, 'position': 5},
{'value': self.uploaded_by.id, 'position': 6}], form=form)
完整跟踪:
Traceback:
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
115. response = callback(request, *callback_args, **callback_kwargs)
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
25. return view_func(request, *args, **kwargs)
File "/Users/user/Documents/workspace/sms/contacts/views.py" in upload_configurator
118. process_upload.delay(upload_id=upload.id, form=form)
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/celery/app/task.py" in delay
357. return self.apply_async(args, kwargs)
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/celery/app/task.py" in apply_async
472. **options)
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/celery/app/amqp.py" in publish_task
249. **kwargs
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/kombu/messaging.py" in publish
157. compression, headers)
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/kombu/messaging.py" in _prepare
233. body) = encode(body, serializer=serializer)
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/kombu/serialization.py" in encode
161. payload = encoder(data)
File "/Users/user/Documents/workspace/sms/django-env/lib/python2.7/site-packages/kombu/serialization.py" in dumps
340. return dumper(obj, protocol=pickle_protocol)
Exception Type: PicklingError at /contacts/upload/configurator/47/
Exception Value: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed
forms.py
COL_CHOICES = [
('N/A', 'No Import'),
('first_name', 'First Name'),
('last_name', 'Last Name'),
('company', 'Company'),
('mobile', 'Mobile Number'),
('email', 'Email Address'),
]
class ConfiguratorForm(forms.Form):
col1 = forms.TypedChoiceField(choices=COL_CHOICES, initial='first_name')
col2 = forms.TypedChoiceField(choices=COL_CHOICES, initial='first_name')
col3 = forms.TypedChoiceField(choices=COL_CHOICES, initial='first_name')
col4 = forms.TypedChoiceField(choices=COL_CHOICES, initial='first_name')
推荐答案
您没有提供ConfiguratorForm的定义,但是无论如何:异步执行要求您任务的参数是可选取的,而显然您的表格则不是.您可能会艰难地选择它,但是那只是浪费时间.简单的解决方案是不传递表单,仅传递表单的数据(iow:request.POST.copy(),但我不确定Querydict是否可选)-或更好,首先验证表单并仅传递表单的cleaned_data,因为处理无效表格毫无意义.
You don't provide your ConfiguratorForm's definition but anyway: async execution requires that your task's arguments are pickable, and obviously your form is not. You could possibly go the hard way and make it pickable but that's just a waste of time. The simple solution is don't pass the form, only pass the form's data (iow: request.POST.copy() but I'm not sure Querydict are pickable) - or better, first validate the form and only pass the form's cleaned_data, as there's no point in processing an invalid form.
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