Django 字段'；id'；应为一个数字，但得到'；亨利'；（AJAX和DRF）

我正在尝试使用AJAX请求和DRF获取用户列表。但是得到这个错误：

Field 'id' expected a number but got 'Henry'.

如果有任何帮助，我将不胜感激

阿贾克斯：

views.py

#this shows all lists for a user
class UserListViewSet(viewsets.ModelViewSet):
    serializer_class = UserListSerializer
 
    def get_queryset(self):
        name = self.request.GET.get('username', None)
        return UserList.objects.filter(user=name)

序列化程序：

class UserListSerializer(serializers.ModelSerializer): #this is what we worked on on October 1
    class Meta:
        model = UserList
        fields = ['id', 'user', 'list_name']

class VenueListSerializer(serializers.ModelSerializer):
    created = serializers.ReadOnlyField()

    class Meta:
        model = VenueList
        fields = ['id', 'title']

相关模型：

class UserList(models.Model):
    list_name = models.CharField(max_length=255)
    user = models.ForeignKey(User, on_delete=models.CASCADE) #is this okay?

    def __str__(self):
        return self.list_name

回溯

Traceback (most recent call last):
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 1774, in get_prep_value
    return int(value)
ValueError: invalid literal for int() with base 10: 'Henry'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/core/handlers/base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/viewsets.py", line 114, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 505, in dispatch
    response = self.handle_exception(exc)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 465, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 476, in raise_uncaught_exception
    raise exc
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 502, in dispatch
    response = handler(request, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/mixins.py", line 38, in list
    queryset = self.filter_queryset(self.get_queryset())
  File "/Users/x/Desktop/Coding/anybody/anybody1/api/views.py", line 33, in get_queryset
    return UserList.objects.filter(user=name)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/query.py", line 942, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/query.py", line 962, in _filter_or_exclude
    clone._filter_or_exclude_inplace(negate, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/query.py", line 969, in _filter_or_exclude_inplace
    self._query.add_q(Q(*args, **kwargs))
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1358, in add_q
    clause, _ = self._add_q(q_object, self.used_aliases)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1380, in _add_q
    split_subq=split_subq, check_filterable=check_filterable,
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1319, in build_filter
    condition = self.build_lookup(lookups, col, value)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1165, in build_lookup
    lookup = lookup_class(lhs, rhs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/lookups.py", line 24, in __init__
    self.rhs = self.get_prep_lookup()
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/fields/related_lookups.py", line 115, in get_prep_lookup
    self.rhs = target_field.get_prep_value(self.rhs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 1778, in get_prep_value
    ) from e
ValueError: Field 'id' expected a number but got 'Henry'.

---

您的

用户

是

用户

模型的

外键

，因此如果您对其进行筛选，它需要的是

用户

的主键，而不是用户名

但是，您可以通过以下方式过滤相关

用户的用户名：

class UserListViewSet(viewsets.ModelViewSet):
    serializer_class = UserListSerializer
 
    def get_queryset(self):
        name = self.request.GET.get('username', None)
        return UserList.objects.filter(user__username=name)
class UserListViewSet（ViewSet.ModelViewSet）：
serializer\u class=UserListSerializer
def get_queryset（自我）：
name=self.request.GET.GET（'username'，无）
返回UserList.objects.filter（user\u username=name）

注意：通常最好使用来引用用户模型，而不是直接使用。有关更多信息，请参见

谢谢你，你今天帮了我两次忙。关于你的笔记，这是否特别重要？我是否正在通过我现在的方式创建漏洞等？@vygrdev:不，如果你以后用自定义的用户模型来更改用户模型，这会更方便。谢谢，是的，我计划最终这样做。谢谢你的提醒。该功能正在按我的计划工作，再次感谢您的帮助。
Traceback (most recent call last):
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 1774, in get_prep_value
    return int(value)
ValueError: invalid literal for int() with base 10: 'Henry'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/core/handlers/base.py", line 179, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/viewsets.py", line 114, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 505, in dispatch
    response = self.handle_exception(exc)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 465, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 476, in raise_uncaught_exception
    raise exc
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/views.py", line 502, in dispatch
    response = handler(request, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/rest_framework/mixins.py", line 38, in list
    queryset = self.filter_queryset(self.get_queryset())
  File "/Users/x/Desktop/Coding/anybody/anybody1/api/views.py", line 33, in get_queryset
    return UserList.objects.filter(user=name)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/query.py", line 942, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/query.py", line 962, in _filter_or_exclude
    clone._filter_or_exclude_inplace(negate, *args, **kwargs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/query.py", line 969, in _filter_or_exclude_inplace
    self._query.add_q(Q(*args, **kwargs))
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1358, in add_q
    clause, _ = self._add_q(q_object, self.used_aliases)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1380, in _add_q
    split_subq=split_subq, check_filterable=check_filterable,
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1319, in build_filter
    condition = self.build_lookup(lookups, col, value)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1165, in build_lookup
    lookup = lookup_class(lhs, rhs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/lookups.py", line 24, in __init__
    self.rhs = self.get_prep_lookup()
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/fields/related_lookups.py", line 115, in get_prep_lookup
    self.rhs = target_field.get_prep_value(self.rhs)
  File "/Users/x/Desktop/Coding/anybody/avenv/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 1778, in get_prep_value
    ) from e
ValueError: Field 'id' expected a number but got 'Henry'.

class UserListViewSet(viewsets.ModelViewSet):
    serializer_class = UserListSerializer
 
    def get_queryset(self):
        name = self.request.GET.get('username', None)
        return UserList.objects.filter(user__username=name)