python django 原生sql 获取数据的例子

            
node2:/django/mysite/blog#cat views.py
1,
 
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
# from django.shortcuts import render, render_to_response
from .models import *
# Create your views here.
from django.http import HttpResponse
from django.template import loader
import MySQLdb
 
def query():
  conn= MySQLdb.connect(
    host='localhost',
    port = 3306,
    user='root',
    passwd='1234567',
    db ='tlcb',
    )
  cur = conn.cursor()
  a=cur.execute("select title,body, DATE_FORMAT(timestamp,'%Y~%m~%d %k.%i.%s') A from blog_blogpost")
  info = cur.fetchall()
  return info
  cur.close()
  conn.close()
 
def archive(req):
 print 'aaaaaaaaaaaaaaaaaaaaaaaaaaa'
 print req
 print type(req)
 print req.GET
 print '#############################'
 print req.GET['aa']
 print req.GET['cc']
 print '#############################'
 print 'aaaaaaaaaaaaaaaaaaaaaaaaaaa'
# get all blogpost objects
 posts =query() 
 print posts
 print type(posts)
 #print blog_list
 template = loader.get_template('archive.html')
 context = {
 'posts':posts
 }
 print '------------------------------------------'
 print HttpResponse(template.render(context, req))
 print '------------------------------------------'
 return HttpResponse(template.render(context, req))
node2:/django/mysite/blog#
 
 
node2:/django/mysite/blog/templates#vi archive.html
node2:/django/mysite/blog/templates#
node2:/django/mysite/blog/templates#
node2:/django/mysite/blog/templates#
node2:/django/mysite/blog/templates#cat archive.html
{% extends "base.html" %} 
{% block content %}
   {% for post in posts %}
   
            

              {{ post.0 }}
            
            

              {{ post.1 | date:"1,F jS"}}
            
            

              {{ post.2 }}
            
            
   {% endfor %}
 {% endblock %}
 
 
 
(('dd', 'ddd', '2017~11~24 8.31.42'), ('66666666', '66666', '2017~11~24 8.35.25'), ('777777777', '77777777777', '2017~11~27 1.46.15'))

            
              
 
 
 
 
 
 
 在自定义 model 方法和模块级方法里,你可以自由的执行自定义SQL语句. 对象 django.db.connection 表示当前的数据库连接. 调用connection.cursor() 得到一个游标对象. 然后调用 cursor.execute(sql, [params])``以执行 SQL 语句, 使用 ``cursor.fetchone() 或cursor.fetchall() 得到结果集. 下面是一个例子:
def my_custom_sql(self): 
  from django.db import connection 
  cursor = connection.cursor() 
  cursor.execute("SELECT foo FROM bar WHERE baz = %s", [self.baz]) 
  row = cursor.fetchone() 
  return row 
 
    如果你的SQL语句改变了数据库中的数据 -- 比如你使用了 DELETE 或 UPDATE 语句. 你需要调用 connection.commit() 来使你的修改生效.
例子:
def my_custom_sql2(self): 
  from django.db import connection 
  cursor = connection.cursor() 
  cursor.execute("DELETE FROM bar WHERE baz = %s", [self.baz]) 
  connection.commit()