英文:
Dajngo: Pagination in search results with Class-based views
问题
我想要根据我在表单中输入的关键词进行分页。
我使用以下类
def pageNotFound(request, exceprion):return HttpResponseNotFound("<h2>Page not found</h2>")def get_quotes():top_tags = get_top_tags()context = {"top_tags": top_tags,"functional_menu": functional_menu,}return contextclass Main(ListView):model = Quotepaginate_by = 10template_name = "quotes/index.html"context_object_name = "quotes"def get_context_data(self, **kwargs):context = super().get_context_data(**kwargs)context.update(get_quotes())return contextclass SearchedResults(ListView):model = Quotepaginate_by = 10template_name = "quotes/index.html"context_object_name = "quotes"def get_queryset(self):query = self.request.GET.get("search_query")if query:queryset = Quote.objects.filter(Q(quote__icontains=query)| Q(tags__name__icontains=query)| Q(author__fullname__icontains=query)).distinct()else:queryset = super().get_queryset()return querysetdef get_context_data(self, **kwargs):context = super().get_context_data(**kwargs)return context
问题是，当您跳转到下一页时，表单字段被清空，查询变成了 None query=None。整个分页变得未定义。如何在分页时保存查询集（queryset）？
英文:
I want to paginate by keywords that I enter in the form.
I use the following class
def pageNotFound(request, exceprion):return HttpResponseNotFound("<h2>Page not found</h2>")def get_quotes():top_tags = get_top_tags()context = {"top_tags": top_tags,"functional_menu": functional_menu,}return contextclass Main(ListView):model = Quotepaginate_by = 10template_name = "quotes/index.html"context_object_name = "quotes"def get_context_data(self, **kwargs):context = super().get_context_data(**kwargs)context.update(get_quotes())return contextclass SearchedResults(ListView):model = Quotepaginate_by = 10template_name = "quotes/index.html"context_object_name = "quotes"def get_queryset(self):query = self.request.GET.get("search_query")if query:queryset = Quote.objects.filter(Q(quote__icontains=query)| Q(tags__name__icontains=query)| Q(author__fullname__icontains=query)).distinct()else:queryset = super().get_queryset()return querysetdef get_context_data(self, **kwargs):context = super().get_context_data(**kwargs)return context
The problem is that when you go to the next page, the form field is cleared and the query takes the value None query=None. The entire pagination becomes undefined. How to save queryset when crossing pages in pagination?
答案1
得分: 1
这与视图的显示关系不大，而与分页链接有关。您可以在视图中创建一个辅助函数：
class SearchedResults(ListView):# ... 其他部分 ...def urlencode_search(self):qd = self.request.GET.copy()qd.pop(self.page_kwarg, None)return qd.urlencode()# ... 其他部分 ...
在模板中，您可以链接到不同的页面：
<a href="?page={{ page_obj.next_page_number }}&b&gt;&amp;amp;{{ view.urlencode_search }}&lt;/b&gt;&quot;&amp;gt;下一页&lt;/a&gt;
英文:
This has not much to do with the view, but the links of the pagination. You can create a helper function in the view:
<pre><code>class SearchedResults(ListView):
model = Quote
paginate_by = 10
template_name = 'quotes/index.html'
context_object_name = 'quotes'
def <b>urlencode_search</b>(self):qd = self.request.GET.copy()qd.pop(self.page_kwarg, None)return qd.urlencode()def get_queryset(self):query = self.request.GET.get('search_query')queryset = super().get_queryset(*args, **kwargs)if query:queryset = queryset.filter(Q(quote__icontains=query)| Q(tags__name__icontains=query)| Q(author__fullname__icontains=query)).distinct()return queryset</code></pre>
In the template, you then link to a different page with:
<pre><code><a href="?page={{ page_obj.next_page_number }}<b>&amp;{{ view.urlencode_search }}</b>">next page</a></code></pre>
and this for all links that go to a page.
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