Django 多条件Q函数查询

1. 适用环境

后台查询数据，如：

后台页面

2. 说明

如果不输入登录名，则只查询用户名，并且使用包含查询，适用但不仅限两个条件的查询

3. 核心代码

def query_admin(request):
    if request.method == 'GET':
        d = request.GET
        q = Q()
        for i in d:
            if d[i]:
                tmp = i + '__contains'
                q.add(Q(**{tmp: d[i]}), Q.AND)
        data = User.objects.filter(q).filter(is_admin=1)  # .values('id', 'login_name', 'user_name')
        return resp(data=[i.to_admin_dict() for i in data])

4. 多维使用

from app01.models import *
from django.db.models import Q



temp = Q()
temp.connector = 'OR'
temp.children.append(('server_name__icontains','mob'))
Server.objects.filter(temp)


temp = Q()
temp.add(('server_name__icontains','mob'),'AND')
temp.add(('id',2),'AND')
temp.add(('id',3),'OR')
Server.objects.filter(temp)



__author__ = 'zhaobin022'

from django.db.models import Q
conditions = {}
values = [ 'id','name']
con = Q()
for k,v in conditions.items():
    temp = Q()
    temp.connector = 'OR'
    for item in v:
        temp.children.append((k,item))
    con.add(temp,'AND')

result = Server.objects.filter(con).values(*values)


from django.db.models import Q
con = Q()

q1 = Q()
q1.connector = 'OR'
q1.children.append(('id', 1))
q1.children.append(('id', 10))
q1.children.append(('id', 9))

q2 = Q()
q2.connector = 'OR'
q2.children.append(('c1', 1))
q2.children.append(('c1', 10))
q2.children.append(('c1', 9))

con.add(q1, 'AND')
con.add(q2, 'AND')

 
n [24]: temp = Q()

In [25]: temp.add(('server_name__icontains','mob'),'AND')
Out[25]: ('server_name__icontains', 'mob')

In [26]: temp.add(('id',2),'AND')
Out[26]: ('id', 2)

In [27]: Server.objects.filter(temp)
Out[27]: []

In [28]:

In [28]: help(temp.add)


In [29]: temp = Q()

In [30]: temp.add(('server_name__icontains','mob'),'AND')
Out[30]: ('server_name__icontains', 'mob')

In [31]: temp.add(('id',2),'AND')
Out[31]: ('id', 2)

In [32]: temp.add(('id',3),'OR')
Out[32]: ('id', 3)

In [33]: Server.objects.filter(temp)
Out[33]: [, ]

5. 借鉴于

Django 动态多条件查询Q函数使用