Python 错误：序列项0:应为str实例，是否找到ForeignKey？

我正在尝试将我的模型添加到admin.py页面，我不得不使用我的许多和Arrayfields字段来让它正常工作，但是我还没有走出泥潭

我收到以下错误：

错误：序列项0：当我尝试在我的管理页面中添加对象时，应为str实例，找到ForeignKey

这是我的原始模型：

class Bucket(models.Model):

    options = (
        ('personal', 'Personal'),
        ('social', 'Social'),
    )


    class BucketObjects(models.Manager):
        def get_queryset(self):
            return super().get_queryset().filter(Bucket.owner)

    owner = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='buckets')
    users = models.ManyToManyField(settings.AUTH_USER_MODEL)
    category = models.CharField(max_length=30, choices=options)
    name = models.CharField(max_length=35)
    created = models.DateTimeField(default=timezone.now)
    slug = models.SlugField(unique=True, blank=True, null=True) 
    stock_count = models.IntegerField(blank=True, null=True)
    stock_list = ArrayField(models.CharField(max_length=6,null=True),size=30,null=True)
    about = models.CharField(max_length=75)

    objects = models.Manager()
    bucketobjects = BucketObjects()

    class Meta:
        ordering = ('-created',)

    def total_stocks_calc(self):
        self.stock_count = Bucket.objects.aggregate(Sum('stock_list', distinct=True))
        self.save()

    def get_absolute_url(self):
        return reverse("bucket:bucket-view", kwargs={"slug": self.slug})

    def __str__(self):
        return self.stock_list

这是我的

admin.py

代码：

@admin.register(models.Bucket)
class AuthorAdmin(admin.ModelAdmin):
    fields = models.Bucket._meta.get_fields()
    list_display = ('id','owner','category', 'get_users', 'name', 'created',
                    'slug','stock_count','get_stocks', 'about')
    prepopulated_fields = {'slug': ('name',), }


    def get_users(self, obj):
        return "\n".join([u.users for u in obj.users.all()])
    
    def get_stocks(self, obj):
        return "\n".join([s.stock_list for s in obj.stock_list.all()])

我不知道为什么会出现这个错误

编辑：完全回溯错误：

Request Method: GET
Request URL: http://127.0.0.1:8000/bbucketmaster9/bucket/bucket/add/

Django Version: 3.1.4
Python Version: 3.8.5
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'rest_framework',
 'django_filters',
 'users',
 'bucket',
 'bucket_api']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/core/handlers/base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/contrib/admin/options.py", line 614, in wrapper
    return self.admin_site.admin_view(view)(*args, **kwargs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/utils/decorators.py", line 130, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/contrib/admin/sites.py", line 233, in inner
    return view(request, *args, **kwargs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/contrib/admin/options.py", line 1653, in add_view
    return self.changeform_view(request, None, form_url, extra_context)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/utils/decorators.py", line 43, in _wrapper
    return bound_method(*args, **kwargs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/utils/decorators.py", line 130, in _wrapped_view
    response = view_func(request, *args, **kwargs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/contrib/admin/options.py", line 1534, in changeform_view
    return self._changeform_view(request, object_id, form_url, extra_context)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/contrib/admin/options.py", line 1568, in _changeform_view
    ModelForm = self.get_form(
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/contrib/admin/options.py", line 709, in get_form
    return modelform_factory(self.model, **defaults)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/forms/models.py", line 555, in modelform_factory
    return type(form)(class_name, (form,), form_class_attrs)
  File "/home/andres/stockbuckets.io/venv/lib/python3.8/site-packages/django/forms/models.py", line 266, in __new__
    message = message % (', '.join(missing_fields),

Exception Type: TypeError at /bbucketmaster9/bucket/bucket/add/
Exception Value: sequence item 0: expected str instance, ForeignKey found

---

您不能为字段使用

models.Bucket.\u meta.get\u fields（）

。将返回字段本身的元组，而不是这些字段的名称

@admin.register(models.Bucket)
class AuthorAdmin(admin.ModelAdmin):
    fields = models.Bucket._meta.get_fields()

@admin.register（models.Bucket）
类AuthorAdmin（admin.ModelAdmin）：
fields=models.Bucket.\u meta.get\u fields（）

您可以明确列出字段的名称，也可以使用

@admin.register(models.Bucket)
class AuthorAdmin(admin.ModelAdmin):
    fields = [f.name for f in models.Bucket._meta.get_fields()]

@admin.register（models.Bucket）
类AuthorAdmin（admin.ModelAdmin）：
fields=[models.Bucket.\u meta.get\u fields（）]中f的f.name

但实际上不需要指定字段。作为：

如果既不存在

字段

也不存在

字段集

选项，Django将 默认情况下，显示每个不是

自动字段且具有
editable=True
，在单个字段集中，顺序与字段相同
在模型中定义

你能发布完整的回溯吗？我假设错误在
get_users
和/或
get_stocks
？嘿@WillemVanOnsem，我刚刚更新了帖子。是的，这解决了问题，谢谢你的帮助！