序列化用户实例用于其他功能

Question

我正在尝试将用户实例传递给我的其他功能，但我无法实现它。用户实例不可用JSON Serialiazzz，因此我对此进行了搜索，发现您可以在Django中使用内置的序列化器。但是我仍然无法正常工作。

视图1：

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

视图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)

模型：

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)

追溯：

> 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

编辑来自代码的追溯：

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

Answer 1

当您将参数传递给背景任务时，应避免通过模型实例。而是传递ID并在任务本身中获取实例。

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

...

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