Reference: http://www.jb51.net/article/128257.htm
coding=utf-8
from django.core.paginator import Paginator
def paginator(data_list, per_page, page_no):
"""封装Django分页"""
pages = Paginator(data_list, per_page)
# Prevent exceeding pages
if not page_no > 0: page_no
= 1
if page_no > pages.num_pages:
page_no = pages.num_pages
p = pages.page(page_no) # Get the data of this page
data = dict() # 获取分页信息
data['count'] = pages.count
data['page_num'] = pages.num_pages
data['per_page'] = per_page
data['current'] = page_no
data['start_index'] = p.start_index() - 1
return p.object_list, page_no, data
class QueryWrapper(object):
"""Query set wrapper. Implement the necessary methods required by django Paginator, and use Paginator paging like query"""
def init (self, sql, params=None, db="default"):
"""
:param sql: sql statement
:param params: params parameter of sql statement
:param db: database name (Django configuration)
"""
self .db = db
self.sql = sql
self.params = params
def count(self):
"""Calculate the total number of pages"""
sql = """select count(*) from (%s) _count""" % self.sql
# Please refer to https://my for sql packaging method .oschina.net/watcher/blog/1573503
return fetchone_sql((sql, self.params), db=self.db, flat=True) # Return the total number of pages
def getslice (self, x, y):
""" self.__getslice(x, y) = self[x:y]"""
sql = self.sql + ' LIMIT {start}, {num}'.format( start=x, num=y - x)
# sql encapsulation method, please refer to https://my.oschina.net/watcher/blog/1573503
return fetchall_to_dict((sql, self.params), db=self.db) # dictionary Return as a list
def demo_orm():
"""Use Django's ORM pagination"""
# Example: query the user pagination with status=1, 10 entries per page, and take the second page of data (assuming enough data)
status = 1
per_page = 10
page_no = 2
# 使用Django的ORM
from django.contrib.auth.models import User
query = User.objects.filter(status=status).values("id", "username", "first_name")
one_page_data_list, page_no, page_data = paginator(query, per_page, page_no)
# one_page_data_list 即为第二页数据，例如：[{"id": 1, "username": "111", "first_name": "aaa"}]
print one_page_data_list
def demo_raw():
"""Use native sql to achieve the same paging"""
# Example: query user paging with status=1, 10 entries per page, and take the second page of data (assuming enough data)
status = 1
per_page = 10
page_no = 2
sql = "select id, username, first_name from auth_user where status=%(status)s"
params = {"status": status} # 使用params防止sql注入
query = QueryWrapper(sql, params, "default")
one_page_data_list, page_no, page_data = paginator(query, per_page, page_no)
# one_page_data_list 同ORM获取数据一样
print one_page_data_list
if name == "main":
demo_orm()
demo_raw()