结合BootStrap样式定义的分页组件
效果:
Python"""
自定义的分页组件,以后如果想要使用这个分页组件,你需要做如下几件事:
在视图函数中:
def pretty_list(request):
# 1.根据自己的情况去筛选自己的数据
queryset = models.PrettyNum.objects.all()
# 2.实例化分页对象
page_object = Pagination(request, queryset)
context = {
"queryset": page_object.page_queryset, # 分完页的数据
"page_string": page_object.html() # 生成页码
}
return render(request, 'pretty_list.html', context)
在HTML页面中
{% for obj in queryset %}
{{obj.xx}}
{% endfor %}
<ul class="pagination">
{{ page_string }}
</ul>
"""
from django.utils.safestring import mark_safe
class Pagination(object):
def __init__(self, request, queryset, page_size=10, page_param="page", plus=5):
"""
:param request: 请求的对象
:param queryset: 符合条件的数据(根据这个数据给他进行分页处理)
:param page_size: 每页显示多少条数据
:param page_param: 在URL中传递的获取分页的参数,例如:/etty/list/?page=12
:param plus: 显示当前页的 前或后几页(页码)
"""
from django.http.request import QueryDict
import copy
query_dict = copy.deepcopy(request.GET)
query_dict._mutable = True
self.query_dict = query_dict
self.page_param = page_param
page = request.GET.get(page_param, "1")
if page.isdecimal():
page = int(page)
else:
page = 1
self.page = page
self.page_size = page_size
self.start = (page - 1) * page_size
self.end = page * page_size
self.page_queryset = queryset[self.start:self.end]
total_count = queryset.count()
total_page_count, div = divmod(total_count, page_size)
if div:
total_page_count += 1
self.total_page_count = total_page_count
self.plus = plus
def html(self):
# 计算出,显示当前页的前5页、后5页
if self.total_page_count <= 2 * self.plus + 1:
# 数据库中的数据比较少,都没有达到11页。
start_page = 1
end_page = self.total_page_count
else:
# 数据库中的数据比较多 > 11页。
# 当前页<5时(小极值)
if self.page <= self.plus:
start_page = 1
end_page = 2 * self.plus + 1
else:
# 当前页 > 5
# 当前页+5 > 总页面
if (self.page + self.plus) > self.total_page_count:
start_page = self.total_page_count - 2 * self.plus
end_page = self.total_page_count
else:
start_page = self.page - self.plus
end_page = self.page + self.plus
# 页码
page_str_list = []
self.query_dict.setlist(self.page_param, [1])
page_str_list.append('<li><a href="?{}">首页</a></li>'.format(self.query_dict.urlencode()))
# 上一页
if self.page > 1:
self.query_dict.setlist(self.page_param, [self.page - 1])
prev = '<li><a href="?{}">上一页</a></li>'.format(self.query_dict.urlencode())
else:
self.query_dict.setlist(self.page_param, [1])
prev = '<li><a href="?{}">上一页</a></li>'.format(self.query_dict.urlencode())
page_str_list.append(prev)
# 页面
for i in range(start_page, end_page + 1):
self.query_dict.setlist(self.page_param, [i])
if i == self.page:
ele = '<li class="active"><a href="?{}">{}</a></li>'.format(self.query_dict.urlencode(), i)
else:
ele = '<li><a href="?{}">{}</a></li>'.format(self.query_dict.urlencode(), i)
page_str_list.append(ele)
# 下一页
if self.page < self.total_page_count:
self.query_dict.setlist(self.page_param, [self.page + 1])
prev = '<li><a href="?{}">下一页</a></li>'.format(self.query_dict.urlencode())
else:
self.query_dict.setlist(self.page_param, [self.total_page_count])
prev = '<li><a href="?{}">下一页</a></li>'.format(self.query_dict.urlencode())
page_str_list.append(prev)
# 尾页
self.query_dict.setlist(self.page_param, [self.total_page_count])
page_str_list.append('<li><a href="?{}">尾页</a></li>'.format(self.query_dict.urlencode()))
search_string = """
<li>
<form style="float: left;margin-left: -1px" method="get">
<input name="page"
style="position: relative;float:left;display: inline-block;width: 80px;border-radius: 0;"
type="text" class="form-control" placeholder="页码">
<button style="border-radius: 0" class="btn btn-default" type="submit">跳转</button>
</form>
</li>
"""
page_str_list.append(search_string)
page_string = mark_safe("".join(page_str_list))
return page_string
pythondef admin_list(request):
''' 管理员 '''
# 构造搜索
data_dict = {}
search_data = request.GET.get('q', "")
if search_data:
data_dict["username__contains"] = search_data
# 根据搜索条件去数据库获取
queryset = models.Admin.objects.filter(**data_dict)
# 分页
page_object = Pagination(request, queryset)
context = {
'queryset': page_object.page_queryset,
'page_string': page_object.html(),
'search_data': search_data
}
return render(request, 'admin_list.html', context)
python<div class="clearfix">
<ul class="pagination">
{{ page_string }}
</ul>
</div>
本文作者:GYC
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