django 快速数据库操作,不用SQL语句

配置models文件

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models
# Create your models here.
class UserMessage(models.Model):
    #设置主键，必须加default属性
    object_id = models.CharField(default="", max_length=20, primary_key=True, verbose_name=u"主键")
    name = models.CharField(max_length=20, verbose_name=u"用户名")
    email = models.EmailField(verbose_name=u"邮箱")
    address = models.CharField(max_length=100, verbose_name="联系地址")
    message = models.CharField(max_length=500, verbose_name="留言信息")
    class Meta:
        verbose_name = u"用户留言信息"
        verbose_name_plural = verbose_name      #如果不指定这个，保存内容会自动加一个s
        # db_table = "user_message"   #设置数据表名称
        # ordering = "-object_id"     #默认排序

生成更改

可以在数据库看到生成的新表

数据库的查询操作

views文件修改

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.shortcuts import render
from models import UserMessage
# Create your views here.
def getform(request):
    #数据库查询
    all_messages = UserMessage.objects.all()    #查询所有
    for message in all_messages:
        print message.name, message.email,message.object_id,message.message,message.address
    return render(request,'message_form.html')

数据库添加测试内容



运行web后查看到调试信息，和上面数据库的一样

不对所有数据查询，也可以对某几种属性查询，使用如下语句查询，下面两个条件是与的关系

   all_messages = UserMessage.objects.filter(name = "神秘藏宝室",address="洛阳")

增加数据库操作

#增加数据库
    user_message = UserMessage()
    user_message.name = "神秘藏宝室2"
    user_message.email = "test@xx.com"
    user_message.object_id = "testid2"
    user_message.message = "helloworld2"
    user_message.address = "洛阳"
    user_message.save()

重新运行项目，刷新网页，在数据库能看到数据了

删除数据库很简单

    #数据库查询
    all_messages = UserMessage.objects.filter(name = "神秘藏宝室",address="洛阳")
    all_messages.delete()   #全部删除
    for message in all_messages:
        print message.name, message.email,message.object_id,message.message,message.address
        message.delete()    #单条删除