Django类视图ListView实现带过滤和分页的列表时过滤不生效如何解决？

你模板中调用的invoices_filtered_list是get_queryset方法内的局部变量，没有传递到模板上下文，所以过滤器表单无法正常渲染，过滤功能自然不生效。另外你现有分页链接仅携带page参数，翻页时会丢失已输入的过滤条件。

1. 重写views.py的get_context_data方法，传递过滤器实例到模板 #

修改后的views.py完整代码：

from django.views.generic import ListView
from .models import WoodhistAzolveInvoices
from .filters import WoodhistAzolveInvoicesFilter


class InvoicesListView(ListView):
    model = WoodhistAzolveInvoices
    template_name = 'home.html'
    context_object_name = 'invoices'
    ordering = ['suppliername', 'invoicenumber']
    paginate_by = 50

    def get_queryset(self):
        qs = super().get_queryset()
        # 将过滤器实例存到对象属性，方便后续调用
        self.invoice_filter = WoodhistAzolveInvoicesFilter(self.request.GET, queryset=qs)
        return self.invoice_filter.qs

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        # 传递过滤器实例到模板，对应模板中调用的变量名
        context['invoices_filtered_list'] = self.invoice_filter
        # 提取当前除page外的所有查询参数，用于分页时保留过滤条件
        context['query_params'] = self.request.GET.copy()
        if 'page' in context['query_params']:
            del context['query_params']['page']
        return context

2. 修改home.html中的分页链接，保留过滤参数 #

将原有分页的href属性统一修改为以下格式，拼接已有的过滤参数：

{% if is_paginated %}
  {% if page_obj.has_previous %}
    <a class="btn btn-outline-info" href="?page=1&{{ query_params.urlencode }}">First</a>
    <a class="btn btn-outline-info" href="?page={{ page_obj.previous_page_number}}&{{ query_params.urlencode }}">Previous</a>
  {% endif %}

  {% for num in page_obj.paginator.page_range %}
    {% if page_obj.number == num %}
      <a class="btn btn-info" href="?page={{ num }}&{{ query_params.urlencode }}"> {{ num }}</a>
    {% elif num > page_obj.number|add:'-3' and num < page_obj.number|add:'3' %}
      <a class="btn btn-outline-info" href="?page={{ num }}&{{ query_params.urlencode }}"> {{ num }}</a>
    {% endif %}
  {% endfor %}

  {% if page_obj.has_next %}
  <a class="btn btn-outline-info" href="?page={{ page_obj.next_page_number }}&{{ query_params.urlencode }}">Next</a>
  <a class="btn btn-outline-info" href="?page={{ page_obj.paginator.num_pages }}&{{ query_params.urlencode }}">Last</a>
  {% endif %}
{% endif %}

如果修改后仍看不到过滤器表单，先确认settings.py的INSTALLED_APPS列表中已经添加了django_filters。

内容的提问来源于stack exchange，提问作者Baldie47