我正在使用django-filter
包在我的列表视图上提供搜索功能。
现在我想为该视图添加分页。
我正在尝试将分页与过滤的查询集结合起来,但我不知道如何继续。
到目前为止,我已在views.py
上尝试了以下内容:
def search(request):
qs = local_url.objects.filter(global_url__id=1).all()
paginator = Paginator(qs, 25)
page = request.GET.get('page')
try:
pub = paginator.page(page)
except PageNotAnInteger:
pub = paginator.page(1)
except EmptyPage:
pub = paginator.page(paginator.num_pages)
url_filter = PublicationFilter(request.GET, queryset=qs)
return render(request, 'ingester/search_list.html', {'filter': url_filter, 'publication':pub})
答案 0 :(得分:5)
这对我有用:
在我的模板中而不是使用此
<li><a href="?page={{ i }}">{{ i }}</a></li>
我写了这个:
{% if 'whatever_parameter_you_use_to_filter' in request.get_full_path %}
<li><a href="{{ request.get_full_path }}&page={{ i }}"{{ i }}</a></li>
{% else %}
<li><a href="?page={{ i }}">{{ i }}</a></li>
{% endif %}
我希望它有所帮助:)
答案 1 :(得分:4)
要使用Django Filter并对筛选结果进行分页,您可以执行以下操作:
为您的模型创建过滤器类:
在my_project/my_app/filters.py
:
import django_filters
class MyModelFilter(django_filters.FilterSet):
class Meta:
model = MyModel
# Declare all your model fields by which you will filter
# your queryset here:
fields = ['field_1', 'field_2', ...]
每个FilterSet
对象都有一个.qs
属性,其中包含已过滤的查询集,您甚至可以override it if you want。
我们将对.qs
的{{1}}属性进行分页:
在MyModelFilter
:
my_project/my_app/views.py
你有它!
<小时/> PS_1:根据我的经验,Django过滤了"plays" better with Django Rest Framework。
PS_2:如果您要使用DRF,我已经编写了一个示例,说明如何在基于函数的视图中使用分页,您可以轻松地将其与from . import filters
def my_view(request):
# BTW you do not need .all() after a .filter()
# local_url.objects.filter(global_url__id=1) will do
filtered_qs = filters.MyModelFilter(
request.GET,
queryset=MyModel.objects.all()
).qs
paginator = Paginator(filtered_qs, YOUR_PAGE_SIZE)
page = request.GET.get('page')
try:
response = paginator.page(page)
except PageNotAnInteger:
response = paginator.page(1)
except EmptyPage:
response = paginator.page(paginator.num_pages)
return render(
request,
'your_template.html',
{'response': response}
)
结合使用:
FilterSet
答案 2 :(得分:2)
此处最重要的部分是如何在模板中构建网址。
你可能有{% if pages.has_previous %}
<li><a href="?page={{ pages.previous_page_number }}">Prev</a></li>
{% endif %}
如果您只使用它来在初始分页结果之间切换,这是完全正常的。
但棘手的部分是当你使用django-fitler
过滤器时,查询字符串(&#39;?&#39; 之后的部分)获得全新的键值对,无视您的?page=2
或类似内容。
因此,当您单击&#34;下一步&#34;时,要使分页工作与过滤结果一致。或者&#34;上一页&#34;按钮 - 在django-fitler
的键值中,您还需要将&page=5
作为对传递。
正如@stathoula所提到的,您需要检查查询字符串中是否已存在至少一个过滤字段。如果是,则需要使用已存在的键值对,然后使用新的&page=3
对。
看起来很简单,但是当用户点击箭头时,我不得不在查询字符串中一遍又一遍地重复&page=1
。
在我的情况下,我拥有&#39; title&#39;作为过滤器,所以我需要检查它是否已经存在。
这是我为我的项目完美运作的一小部分。
<强>模板/ pagination.html 强>
<div class="paginator">
{% with request.get_full_path as querystring %}
<ul class="pagination nav navbar-nav">
<!-- Previous page section -->
{% if pages.has_previous %}
{% if 'title' in querystring %}
{% if 'page' in querystring %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="{{ querystring|slice:":-7" }}&page={{ pages.previous_page_number }}">Prev</a>
</li>
{% else %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="{{ querystring }}&page={{ pages.previous_page_number }}">Prev</a>
</li>
{% endif %}
{% else %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="?page={{ pages.previous_page_number }}">Prev</a>
</li>
{% endif %}
{% endif %}
<!-- All pages section -->
{% for page in pages.paginator.page_range %}
{% if 'title' in querystring %}
{% if 'page' in querystring %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="{{ querystring|slice:":-7" }}&page={{ page }}">{{ page }}</a>
</li>
{% else %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="{{ querystring }}&page={{ page }}">{{ page }}</a>
</li>
{% endif %}
{% else %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="?page={{ page }}">{{ page }}</a>
</li>
{% endif %}
{% endfor %}
<!-- Next page section -->
{% if pages.has_next %}
{% if 'title' in querystring %}
{% if 'page' in querystring %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="{{ querystring|slice:":-7" }}&page={{ pages.next_page_number }}">Next</a>
</li>
{% else %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="{{ querystring }}&page={{ pages.next_page_number }}">Next</a>
</li>
{% endif %}
{% else %}
<li class="paginator {% if pages.number == page %}active{% endif %}">
<a href="?page={{ pages.next_page_number }}">Next</a>
</li>
{% endif %}
{% endif %}
</ul>
{% endwith %}
</div>
以下是视图,以防万一:
应用/ views.py 强>
def index(request):
condo_list = Condo.objects.all().order_by('-timestamp_created')
condo_filter = CondoFilter(request.GET, queryset=condo_list)
paginator = Paginator(condo_filter.qs, MAX_CONDOS_PER_PAGE)
page = request.GET.get('page')
try:
condos = paginator.page(page)
except PageNotAnInteger:
condos = paginator.page(1)
except EmptyPage:
condos = paginator.page(paginator.num_pages)
return render(request, 'app/index.html', {
'title': 'Home',
'condos': condos,
'page': page,
'condo_filter': condo_filter,
})
这是一个有效的例子:
答案 3 :(得分:1)
据我所知,您的目标是对过滤后的查询集进行分页。如果是这样,您可以将PublicationFilter对象的“qs”属性传递给Paginator构造函数:
def search(request):
qs = local_url.objects.filter(global_url__id=1).all()
url_filter = PublicationFilter(request.GET, queryset=qs)
paginator = Paginator(url_filter.qs, 25)
page = request.GET.get('page')
try:
pub = paginator.page(page)
except PageNotAnInteger:
pub = paginator.page(1)
except EmptyPage:
pub = paginator.page(paginator.num_pages)
url_filter = PublicationFilter(request.GET, queryset=qs)
return render(request, 'ingester/search_list.html', {'publication':pub})
url_filter.qs 包含已过滤的QuerySet
url_filter.queryset 包含未过滤的QuerySet
答案 4 :(得分:1)
我花了一些时间找到DRYer和更清洁的解决方案来解决此问题,我认为最好的解决方案是使用模板标签的解决方案。
from django import template
register = template.Library()
@register.simple_tag
def relative_url(value, field_name, urlencode=None):
url = '?{}={}'.format(field_name, value)
if urlencode:
querystring = urlencode.split('&')
filtered_querystring = filter(lambda p: p.split('=')[0] != field_name, querystring)
encoded_querystring = '&'.join(filtered_querystring)
url = '{}&{}'.format(url, encoded_querystring)
return url
并在您的模板中
<a href="{% relative_url i 'page' request.GET.urlencode %}">{{ i }}</a>
答案 5 :(得分:0)
要添加到答案中,我也使用html表以及django-filters和Paginator进行了此操作。以下是我的视图和模板文件。需要使用模板标记,以确保您将正确的参数传递给分页网址。
search_view.py
from django.shortcuts import render
from app.models.filters_model import ApiStatusFilter
from app.models.api_status import ApiStatus
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from datetime import datetime, timedelta
def status(request):
all_entries_ordered = ApiStatus.objects.values().order_by('-created_at')[:200]
for dictionarys in all_entries_ordered:
dictionarys
apistatus_list = ApiStatus.objects.values().order_by('-created_at')
apistatus_filter = ApiStatusFilter(request.GET, queryset=apistatus_list)
paginator = Paginator(apistatus_filter.qs, 10)
page = request.GET.get('page')
try:
dataqs = paginator.page(page)
except PageNotAnInteger:
dataqs = paginator.page(1)
except EmptyPage:
dataqs = paginator.page(paginator.num_pages)
return render(request, 'status_page_template.html', {'dictionarys': dictionarys, 'apistatus_filter': apistatus_filter, 'dataqs': dataqs, 'allobjects': apistatus_list})
status_template.html
{% load static %}
{% load my_templatetags %}
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" type="text/css" href="{% static 'css/table_styling.css' %}">
<meta charset="UTF-8">
<title>TEST</title>
</head>
<body>
<table>
<thead>
<tr>
{% for keys in dictionarys.keys %}
<th>{{ keys }}</th>
{% endfor %}
</tr>
</thead>
<form method="get">
{{ apistatus_filter.form.as_p }}
<button type="submit">Search</button>
{% for user in dataqs.object_list %}
<tr>
<td>{{ user.id }}</td>
<td>{{ user.date_time }}</td>
<td>{{ user.log }}</td>
</tr>
{% endfor %}
</form>
</tbody>
</table>
<div class="pagination">
<span>
{% if dataqs.has_previous %}
<a href="?{% query_transform request page=1 %}">« first</a>
<a href="?{% query_transform request page=dataqs.previous_page_number %}">previous</a>
{% endif %}
<span class="current">
Page {{ dataqs.number }} of {{ dataqs.paginator.num_pages }}.
</span>
{% if dataqs.has_next %}
<a href="?{% query_transform request page=dataqs.next_page_number %}">next</a>
<a href="?{% query_transform request page=dataqs.paginator.num_pages %}">last »</a>
{% endif %}
</span>
</div>
</body>
</html>
my_templatetags.py
from django import template
register = template.Library()
@register.simple_tag
def query_transform(request, **kwargs):
updated = request.GET.copy()
for k, v in kwargs.items():
if v is not None:
updated[k] = v
else:
updated.pop(k, 0)
return updated.urlencode()
答案 6 :(得分:0)
pip install filter-and-pagination
pip install filter-and-pagination
安装软件包from filter_and_pagination import FilterPagination
在view.py中导入FilterPagination queryset = FilterPagination.filter_and_pagination(request, Customer)
serialize_data = CustomerSerializer(queryset['queryset'], many=True).data
resultset = {'dataset': serialize_data, 'pagination': queryset['pagination']}
Customer
中是Django模型&CustomerSerializer
是DRF序列化程序类如果您仍然遇到任何困难,请与我联系:)
答案 7 :(得分:0)
我为分页结果“记住过滤器/查询URL参数”的方法:将当前URL参数作为上下文变量传递:
# views.py
class PublicationFilterView(FilterView):
model = Publication
filterset_class = PublicationFilter
paginate_by = 15
def get_context_data(self, *args, **kwargs):
_request_copy = self.request.GET.copy()
parameters = _request_copy.pop('page', True) and _request_copy.urlencode()
context = super().get_context_data(*args, **kwargs)
context['parameters'] = parameters
return context
# templates/path/to/pagination.html
<a href="?page={{ page_obj.next_page_number }}&{{ parameters }}">
Next
</a>