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一、数据调用下拉菜单内容
viwes.py
from django.shortcuts import render,HttpResponse,render_to_response from django import forms from app01 import models class IndexForm(forms.Form): # c = [ # (1,‘CEO‘), # (2,‘COO‘) # ] c = models.UserType.objects.all().values_list(‘id‘,‘caption‘) user_type_id = forms.IntegerField(widget=forms.Select(choices=c)) def __init__(self,*args, **kwargs): #这段目的添加完用户类型，网页立即显示 # 父类构造方法：1、获取所有静态字段 2、fields = [] super(IndexForm, self).__init__(*args, **kwargs) # print(self.fields[‘user_type_id‘].widget.choices) self.fields[‘user_type_id‘].widget.choices = models.UserType.objects.all().values_list(‘id‘,‘caption‘) def index(request): # for i in range(10): #添加表数据 # models.UserType.objects.create(caption=‘CE‘+str(i)) # c = models.UserType.objects.all().count() # print(c) form = IndexForm() return render(request, ‘index.html‘, {‘form‘: form}) def add_user_type(request): #get http://127.0.0.1:8000/add_user_type?q=CVO 方式可以添加用户类型CVO q = request.GET.get(‘q‘, None) if q: models.UserType.objects.create(caption=q) return HttpResponse(q)
model.py
from django.db import models # Create your models here. class UserType(models.Model): caption = models.CharField(max_length=16)
显示效果
二、
model操作 F/Q
F:
temp = salary+500
models.UserInfo.objects.filter().update(salary=temp)
update userinfo set salary=salary+500
from django.db.models import F
models.UserInfo.objects.filter().update(salary=F(‘salary‘)+500)
Q:
构造搜索条件
1、传参
models.UserInfo.objects.filter(id=123,name=‘alex‘)
2、传字典
d = {‘id‘: 123, ‘name‘:‘alex‘}
models.UserInfo.objects.filter(**d)
<input name=‘id‘ />
<input name=‘name‘ />
获取用户输入，并构造成字典：
models.UserInfo.objects.filter(**c)
3、传Q对象
models.UserInfo.objects.filter(Q对象)
viwes.py
def index(request): form = IndexForm() from django.db.models import Q """ q1 = Q() q1.connector = ‘OR‘ q1.children.append((‘id‘, 1)) q1.children.append((‘id‘, 2)) q1.children.append((‘id‘, 3)) # 1 CE0 # 2 CE1 # 3 CE2 obj = models.UserType.objects.filter(q1) for item in obj: print(item.id,item.caption) """ con = Q() q1 = Q() q1.connector = ‘OR‘ q1.children.append((‘id‘, 1)) q1.children.append((‘id‘, 2)) q1.children.append((‘id‘, 3)) q2 = Q() q2.connector = ‘OR‘ q2.children.append((‘caption‘, ‘CE1‘)) q2.children.append((‘caption‘, ‘CE2‘)) con.add(q1, ‘AND‘) con.add(q2, ‘AND‘) obj = models.UserType.objects.filter(con) for item in obj: print(item.id,item.caption) return render(request, ‘index.html‘, {‘form‘: form})
# 2 CE1
# 3 CE2
三、中间件
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原文地址：http://www.cnblogs.com/wudalang/p/5880768.html
