Python django返回url kwarg字符串，用于作为int进行筛选，尝试作为pk使用

请注意下面的url

http://127.0.0.1:8000/api/neighborhood-list/chicago/

此url绑定到一个资源，该资源将返回一个城市中所有社区的列表

但是，我当前遇到以下错误：

    invalid literal for int() with base 10: 'chicago'
Exception Location: /home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py in get_prep_value, line 966

第966行：返回intvalue

现在我已经在这里提出了这个问题：

并且已经实施了这些建议，但我仍然在反对django框架。看起来Django框架默认使用我的关键字url agrument作为主键

这是我的url、视图、序列化程序和模型代码

网址：

序列化程序：

class NeighborhoodSerializer(serializers.ModelSerializer):
    class Meta:
        model = Neighborhood
        fields = 'neighborhood'

型号：

class  Neighborhood(models.Model):
city = models.ForeignKey(City, null=True)
neighborhood = models.CharField(max_length=150, null=False)

如果你愿意，这里是我认为需要的回溯的完整打印件：

  Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/api/neighborhood-list/chicago/

Django Version: 1.11.2
Python Version: 2.7.12
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'rest_framework',
 'venue.apps.VenueConfig']
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:

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view
  58.         return view_func(*args, **kwargs)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/rest_framework/views.py" in dispatch
  489.             response = self.handle_exception(exc)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/rest_framework/views.py" in handle_exception
  449.             self.raise_uncaught_exception(exc)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/rest_framework/views.py" in dispatch
  486.             response = handler(request, *args, **kwargs)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/rest_framework/generics.py" in get
  201.         return self.list(request, *args, **kwargs)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/rest_framework/mixins.py" in list
  40.         queryset = self.filter_queryset(self.get_queryset())

File "/home/rickus/211hospitality/suitsandtables/backend/suitsandtables/venue/views.py" in get_queryset
  50.         return self.queryset.filter(city=self.kwargs.get('city'))

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/query.py" in filter
  784.         return self._filter_or_exclude(False, *args, **kwargs)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/query.py" in _filter_or_exclude
  802.             clone.query.add_q(Q(*args, **kwargs))

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in add_q
  1261.         clause, _ = self._add_q(q_object, self.used_aliases)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in _add_q
  1287.                     allow_joins=allow_joins, split_subq=split_subq,

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in build_filter
  1217.             condition = lookup_class(lhs, value)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/lookups.py" in __init__
  24.         self.rhs = self.get_prep_lookup()

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/fields/related_lookups.py" in get_prep_lookup
  112.                 self.rhs = target_field.get_prep_value(self.rhs)

File "/home/rickus/211hospitality/suitsandtables/backend/venv/local/lib/python2.7/site-packages/django/db/models/fields/__init__.py" in get_prep_value
  966.         return int(value)

Exception Type: ValueError at /api/neighborhood-list/chicago/
Exception Value: invalid literal for int() with base 10: 'chicago'

你的问题是：

self.queryset.filter(city=self.kwargs.get('city'))

city是city的外键，由其id属性整数匹配。您试图将其与“chicago”匹配，后者显然作为整数失败，因此出现了异常

这里有两个选项，可以参考城市名称：

self.queryset.filter(city__name=self.kwargs.get('city'))

或者先获取城市对象：

city = City.objects.filter(name__contains=self.kwargs.get('city')).first()
self.queryset.filter(city=city)

---

我在这里使用一个过滤器，如果找不到城市，a.get将引发异常。

错误回溯与您发布的代码不匹配。在回溯中，它说你正在做邻居=邻居。对象。过滤城市=自我。城市。你没有显示VenueFilterOptionsView@MosesKoledoye天哪，谢谢你，哈哈，我用错了该死的视角！让我看看，看来我们还是有问题。我需要看看我用正确的堆栈跟踪修复了它。尽管我现在的观点是正确的，但问题仍然存在。当我写出我的原始sql时，我确实给city.name属性命名了，只是没有想到要跨越它。这些问题很简单。非常感谢。

self.queryset.filter(city__name=self.kwargs.get('city'))

city = City.objects.filter(name__contains=self.kwargs.get('city')).first()
self.queryset.filter(city=city)