django 动态查询实现过程

一、背景描述

在前端页面上有查询功能，要查询的输入选择有username，address，mobile等，可以通过任意一个查询，或者任意组合进行查询。
后端，获取传入的数值。判断哪个有输入，再在数据库中进行查询

二、解决方案

根据条件，动态实现查询过程

condition = {}
if username:
	condition['username__startWith'] = username
if address:
	condition['addr__contains'] = address
if mobile is not None:
	condition['mobile__endWith'] = mobile
person = User.objects.filter(**condition)

先查询所有，或者固定筛选的条件，动态实现查询过程

person = User.objects.all()
if username:
	person = person.filter(username__startWith= username)
if address:
	person = person.filter(addr__contains= address)
if mobile is not None:
	person = person.filter(mobile__endWith= mobile)

person = User.objects.filter(**condition)

三、后续操作

from django.core.paginator import Paginator

person = person.order_by('-create_tiem')  倒序

page = Paginator(person, page_size)
total_count = person.count()
total_page = page.num_pages
if page_num > total_page:
    page_num = 1
    
result = list(pag.page(page_num).object_list.values())