Python 序列化用户实例以用于其他函数

我试图将一个用户实例传递给我的另一个函数，但我无法实现。用户实例不是JSON序列化的，所以我在Google上搜索了一下，发现可以在Django中使用内置序列化程序。但是我还是不能让它工作

意见1：

from django.core import serializers
userdata = request.user
serialized_obj = serializers.serialize('json', userdata)
SubtaskUpdate("2464c7ca-7f14-11e9-b4c2-b870aca6d744", serialized_obj)

意见2：

def SubtaskUpdate(taskid, user):
    base_dir = settings.BASE_DIR
    uniquefolder = os.path.join(base_dir, 'var/taskqueries').replace("\\", "/")
    os.chdir(uniquefolder)
    logfilnavn = str(uuid.uuid4()) # Variabel til filnavn
    logfile = open(logfilnavn, 'w') # Åbner fil med navn fra forrige variabel
    proc=subprocess.Popen(['golemcli', '--mainnet', "tasks", 'subtasks', taskid, "--json"], universal_newlines=True, stdout=logfile, stderr=logfile)
    proc.wait()
    logfile.close()
    taskre = Task(TaskID=taskid, User=user)
    taskre.save()
    with open(logfilnavn) as json_file:
        print(json_file) 
        json_object = json.load(json_file)
        for node in json_object['values']:
            Node = node[0]
            ID = node[1]
            Time = node[2]
            Status = node[3]
            h = NodesData.objects.get(Node=Node)
            a = Subtask(SubtaskID=ID, Country=h.NodeCountry, City=h.NodeCity, Cores=h.Node_Cores, Disk=h.Node_Disk, Memory=h.Node_Memory, OS=h.Node_OS,  SubtaskNode=Node, SubtaskStatus=Status, Task=taskre)
            a.save()
    os.remove(logfilnavn)

型号：

class Task(models.Model):
    TaskID = models.CharField(max_length=128)
    User = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,)



class Subtask(models.Model):
    SubtaskID = models.CharField(max_length=128, default="Awaiting Query")
    SubtaskNode = models.CharField(max_length=24, default="Awaiting Query")
    SubtaskStatus = models.CharField(max_length=15, default="Awaiting Query")
    Country = models.CharField(max_length=25, default="Awaiting Query")
    City = models.CharField(max_length=25, default="Awaiting Query")
    OS = models.CharField(max_length=15, default="Awaiting Query")
    Cores = models.CharField(max_length=15, default="Awaiting Query")
    Memory = models.CharField(max_length=15, default="Awaiting Query")
    Disk = models.CharField(max_length=15, default="Awaiting Query")
    SubtaskStatus = models.CharField(max_length=15, default="Awaiting Query")
    Task = models.ForeignKey(Task, on_delete=models.CASCADE)

回溯：

> Internal Server Error: /faq Traceback (most recent call last):   File
> "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/handlers/exception.py",
> line 34, in inner
>     response = get_response(request)   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/handlers/base.py",
> line 126, in _get_response
>     response = self.process_exception_by_middleware(e, request)   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/handlers/base.py",
> line 124, in _get_response
>     response = wrapped_callback(request, *callback_args, **callback_kwargs)   File "./faq/views.py", line 11, in index
>     serialized_obj = serializers.serialize('json', userdata)   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/serializers/__init__.py",
> line 128, in serialize
>     s.serialize(queryset, **options)   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/serializers/base.py",
> line 87, in serialize
>     for count, obj in enumerate(queryset, start=1):   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/utils/functional.py",
> line 214, in inner
>     return func(self._wrapped, *args) TypeError: 'User' object is not iterable Not Found: /favicon.ico

编辑 从代码回溯：

from django.shortcuts import render
from .models import stats
from backgroundtasks.models import NodesData
from backgroundtasks.tasks import SubtaskUpdate
from callgolem.models import Task, Subtask
from django.core import serializers
import json


def index(request):
    SubtaskUpdate("2464c7ca-7f14-11e9-b4c2-b870aca6d744", request.user)
    data = stats.objects.get(id=1)
    mapdb = NodesData.objects.all()
    return render(request, 'faq.html', {'data':data, 'mapdb':mapdb}) 

Traceback (most recent call last):
   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
   File "./faq/views.py", line 10, in index
    SubtaskUpdate("2464c7ca-7f14-11e9-b4c2-b870aca6d744", request.user)
   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/background_task/tasks.py", line 296, in __call__
    remove_existing_tasks)
   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/background_task/tasks.py", line 223, in schedule
    repeat_until, remove_existing_tasks)
   File "/home/django/copypaste/cleanup/lib/python3.6/site-packages/background_task/models.py", line 91, in new_task
    task_params = json.dumps((args, kwargs), sort_keys=True)
   File "/usr/lib/python3.6/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
   File "/usr/lib/python3.6/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
   File "/usr/lib/python3.6/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
   File "/usr/lib/python3.6/json/encoder.py", line 180, in default
    o.__class__.__name__) TypeError: Object of type 'User' is not JSON serializable
Not Found: /favicon.ico

---

向后台任务传递参数时，应避免传递模型实例。而是在任务本身中传递ID并获取实例

SubtaskUpdate('<uuid>',  request.user.id)

---

为什么要序列化它呢？似乎没有任何理由这么做。只需将用户传递给SubtaskUpdate。@DanielRoseman我已经尝试过SubtaskUpdate 2464C7CA-7f14-11e9-b4c2-b870aca6d744，request.user，但它返回TypeError:类型为“user”的对象不是JSON Serializable，那么您就没有向我们展示代码了。这里没有做任何其他的序列化。我使用的所有代码都在这篇文章中，然后我的第一次尝试没有成功，我在上面的评论中提到了@DanielRosemanSo请展示从非JSON可序列化错误的完整回溯。现在我不能再使用@background decorator了，你知道如何实现后台任务吗？什么？你可以用装饰器。我回答的全部要点是展示在使用模型时如何传递模型。

def SubtaskUpdate(taskid, user_id):
    user = User.objects.get(id=user_id)