django之创建第8-3个项目-数据库数据提取之高级操作

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1、配置test2.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body><li>获取单个数据</li>
<li>ID:{{student.id}}---name:{{student.name}}---sex:{{student.sex}}</li></body>
</html>

2、配置student_list。html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body><li>遍历数据库student中的数据</li>
{% for student in studentList %}
<li>{{student}}</li> 
{% endfor %}<br>
<li>数据过滤</li>
{% for student in studentList %}
<li>{{student.name}},{{student.age}}</li>
{% endfor %}<li>获取单个数据</li>
<li>{{student}}</li></body>
</html>

3、配置urls文件

# -*- coding: UTF-8 -*-
from django.conf.urls import patterns, include, urlurlpatterns = patterns('blog.views',
url(r'^index/$', 'index'),
url(r'^time/$', 'time'),
url(r'^shengfen/$', 'shengfen'),
#url(r'^foo/(\d{4})/$', 'foo'), #表示接收4个数字,#\w+接收至少一个字母
url(r'^foo/(\d{4})/(\w+)/$',"foo"),
url(r'^bar/(?P<id>\d{4})/(?P<name>\w+)/$','bar'),#强制规定bar(request,id,name)处的参数必须为id和name
url(r'^student_list/$','student_list'),
url(r'^test2/$','test2'),
)

4、配置views文件

# Create your views here.
#coding:utf-8
from django.http import HttpResponse
import datetime
#导入templates文件所需导入库
from django.template import loader,Context
#引入Student等模块
from blog.models import *def student_list(request):
t=loader.get_template("student_list.html") #第1种方法：输出数据库中student表中的数据
#studentList = Student.objects.all() # 等价于 select * from student #第2种方法：根据age字段做排序处理并输出结果 .order_by("age")
#studentList = Student.objects.all().order_by("age") #第3种方法：根据age字段做降序处理并输出结果 .order_by("-age")
#studentList = Student.objects.all().order_by("-age") # 第4种方法：支持多个字段排序
#studentList = Student.objects.all().order_by("age","name") # 第5种方法：支持过滤
#studentList = Student.objects.filter( age= 16 ) # 第6种方法：过滤大于16的数据
#age__gt=16等价于age > 16，注意age和__gt之间是没有空格的
studentList = Student.objects.filter(age__gte = 16) c = Context({"studentList": studentList})
return HttpResponse(t.render(c))def test2(request):
t=loader.get_template("test2.html") #第7种方法：获取单个数据
student = Student.objects.get(id=1) #第8种方法：修改数据库数据并保存
student.name='xiaodeng'
student.age=28
student.intime = '1987-08-22'
student.save() #第9种方法：批量更新数据
studentList=Student.objects.filter(age__lt=17).update(name = 'FengMei') #新增语句,刷新多少次就会增加多少条记录
newData=Student(name='python',age=1000,intime='1999-09-09',sex=0)
newData.save() #删除数据,二次操作会报错，因为索引7已经删除了，不存在了，再次删除索引7当然会出错。
#student = Student.objects.get(id=7)
#student.delete() # 删除所有数据
#Student.objects.all().delete()
#student={} student = Student.objects.get(id=1)
c = Context({"student": student})
return HttpResponse(t.render(c))class Person():
def __init__(self,name,age,sex):
self.age=age
self.sex=sex
self.name=name def myMethod(self):
return "get it"def time(request):
t = loader.get_template("time.html")
myId = request.GET.get("id")
myName = request.GET.get("name")#获取传递的name的value值
user = {"today": datetime.datetime.now(),"id":myId,"name":myName}
c = Context(user)
return HttpResponse(t.render(c))def foo(request,myID,myName):
t = loader.get_template("foo.html")
user = {"today": datetime.datetime.now(),"id":myID,"name":myName}
c = Context(user)
return HttpResponse(t.render(c))def bar(request,id,name):
t = loader.get_template("bar.html")
user = {"today": datetime.datetime.now(),"id":id,"name":name}
c = Context(user)
return HttpResponse(t.render(c))def shengfen(request):
t = loader.get_template("shengfen.html")
user = {"shengfen":"湖北省恩施市"}
c = Context(user)
return HttpResponse(t.render(c))def index(request):
#第二个项目
#return HttpResponse("hello,Django") #加载器，加载模板
t=loader.get_template("index.html") # django之创建第4-1个项目-Dict形式
user = {"name": "xiaodeng", "sex": "male", "age": 28,"today":datetime.datetime.now()}
c = Context({"test": user}) # 在这里test位变量，user为变量的值
return HttpResponse(t.render(c))