结果位于/ ValueError /ValueError/
结果位于/ ValueError /ValueError/
提问于 2020-04-21 04:39:05
“字段'id‘需要一个数字，但得到了’results‘。”
在尝试对图书列表使用搜索筛选器时，我遇到了这个错误。在我将基于类的视图更改为基于函数的视图之前，它工作得很好。
这是之前使用默认DetailView类的基于类的视图：
class BookDetailView(LoginRequiredMixin,DetailView):
model = models.Book
template_name='book_detail.html'
login_url='login'这是我更改为的新的基于函数的详细视图：
@login_required
def book_detail(request,book_id):
model =models.Book
book=model.objects.get(id=book_id)
template ='book_detail.html'
owner =CustomUser.objects.get(username=book.owner)
return render(request,template,{'book':book,'owner':owner})当我尝试进入细节视图时，它工作得很好。但是当我尝试使用'book_search‘视图进行搜索时，它抛出了这个错误。以前，搜索功能也运行得很好。
@login_required
def book_search(request):
template ='book_list.html'
model =models.Book
query =request.GET.get('q')
results =model.objects.exclude(owner =request.user).order_by('-available','-id')
if query:
results =results.filter(Q(title__icontains =query))
paginator = Paginator(results, 9)
page =request.GET.get('page')
try:
books =paginator.page(page)
except PageNotAnInteger:
books =paginator.page(1)
except EmptyPage:
books= paginator.page(paginator.num_pages)
return render(request,template,{'books':books,'query':query,'page':page})这与结果集有关，搜索视图返回一个图书列表，而详细视图只需要一个id。
编辑:错误堆栈：-
ValueError: invalid literal for int() with base 10: 'results'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\contrib\auth\decorators.py", line 21, in _wrapped_view
return view_func(request, *args, **kwargs)
File "C:\Users\Dell\Documents\read_bus\books\views.py", line 216, in book_detail
book=results.get(id=book_id)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\query.py", line 404, in get
clone = self._chain() if self.query.combinator else self.filter(*args, **kwargs)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\query.py", line 904, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\query.py", line 923, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\sql\query.py", line 1337, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\sql\query.py", line 1365, in _add_q
split_subq=split_subq, simple_col=simple_col,
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\sql\query.py", line 1298, in build_filter
condition = self.build_lookup(lookups, col, value)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\sql\query.py", line 1155, in build_lookup
lookup = lookup_class(lhs, rhs)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\lookups.py", line 22, in __init__
self.rhs = self.get_prep_lookup()
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\lookups.py", line 72, in get_prep_lookup
return self.lhs.output_field.get_prep_value(self.rhs)
File "C:\Users\Dell\.virtualenvs\read_bus-VVRhbVr5\lib\site-packages\django\db\models\fields\__init__.py", line 1772, in get_prep_value
) from e回答 2
Stack Overflow用户
回答已采纳
发布于 2020-04-21 11:13:43
我似乎找到了解决方案。
实际上是'book_detail‘的url模式导致了这个问题。我在没有使用路径转换器urls.py的情况下创建它：
...
urlpatterns =[
path('<book_id>/',views.book_detail,name ='book_detail'),
path('results/',views.book_search,name ='search'),
]我认为仅仅使用<book_id>就足够了，因为它在for模式的层次结构中更高，所以它的“结果”也是匹配的。
更改<int:book_id>的路径起作用了。现在我已经意识到了小路径转换器的重要性，并且永远不会忘记使用它。
Stack Overflow用户
发布于 2020-04-21 12:34:16
对于此detail_view：
URL应如下所示：
urlpatterns =[
path('book/<int:pk>',views.book_detail,name ='book_detail'),
path('results/',views.book_search,name ='search'),
]而视图函数应该是这样的：
@login_required
def book_detail(request,book_id):
model =models.Book
book=model.objects.get(id=book_id)
template ='book_detail.html'
owner =CustomUser.objects.get(username=book.owner)
return render(request,template,{'book':book,'owner':owner})将值作为http://127.0.0.1:8000/api/book/1传递
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/61331645
复制相关文章
相似问题
腾讯云开发者
