node+sequelize实现单表多表操作
需要mysql和sequelize两个模块
1.单表增删改查
创建User.js,用于连接和初始化
var Sequelize = require('sequelize');
var mysql = require('mysql');
var config = {
database:'sheila',
username:'root',
password:'',
host:'localhost',
port:3306
};
var sequelize = new Sequelize(config.database, config.username, config.password, {
host:config.host,
dialect:'mysql',
pool: {
max: 5,
min: 0,
idle: 30000
}
});
var User = sequelize.define('userinfo', {
id : {type : Sequelize.INTEGER, autoIncrement : true, primaryKey : true},
user : {type : Sequelize.STRING, allowNull : false},
password : {type : Sequelize.STRING, allowNull : false},
},{
timestamps:false,
freezeTableName:true
});
module.exports = User;创建register.js,测试请求和返回
var express = require('express');
var router = express.Router();
var log4js = require('log4js');
var User = require("../models/User.js");
var bodyParser = require('body-parser');//使用Express接收form表单的submit(提交格式为www-form-urlencoded)需要 body-parse 插件支持
router.get('/', function(req, res, next) {
res.render('register', {errMsg:"in register page11"});
// res.redirect("http://www.example.com");//网址重定向
});
router.post('/', function(req, res, next) {
var username = req.body.username;
var password = req.body.password;
User.findAll({
where:{
user : username
}
}).then(function(data){
if(data.length > 0){
res.json({status:'已经有相同的名字了'});
}else{
User.create({
user : username,
password : password
}).then(function (p){
if(p){
res.json({status:1});
res.end();
}else{
res.json({status:0});
res.end();
}
}).catch(function (err){
console.log('err'+err);
});
}
}).catch(function(err){
console.log('err'+ err);
});
// res.end();
});
module.exports = router;创建register.html,发送请求页面
<html>
<head>
<title>注册title>
<link rel='stylesheet' href='/stylesheets/style.css' />
head>
<body>
<form action="/register" method="post">
<div class="form-group">
<div class="form-name left">
<label>用户名label>
div>
<input type="text" name="username" class="form-input left" value="test" />
div>
<div class="form-group">
<div class="form-name left">
<label>密码label>
div>
<input type="password" name="password" class="form-input left"/ value="123456">
div>
<div class="form-btn">
<input type="submit" value="注册" />
div>
<div class="form-btn">
<label class="warn"><%= errMsg %>label>
div>
form>
body>
html>2.两张表关联和查询
初始化用户表
/*
用户表 ct_user
*/
var Sequelize = require('sequelize');
var sequelize = require("../config/sql_config.js");
var User_relation = require('../models/User_relation');
var User = sequelize.define('ct_user', {
// id : {type : Sequelize.INTEGER, autoIncrement : true, primaryKey : true},
username : {type : Sequelize.STRING, allowNull : false},//用户名
password : {type : Sequelize.STRING, allowNull : false},//密码
details : {type : Sequelize.STRING, allowNull : true},//简介
head_thumb : {type : Sequelize.STRING, allowNull : true},//头像
gender : {type : Sequelize.STRING, allowNull : true},//性别
nickname : {type : Sequelize.STRING, allowNull : true},//昵称
userid : {type : Sequelize.INTEGER, autoIncrement : true, primaryKey : true}//用户userid
},{
timestamps:false,
freezeTableName:true
});
//指定User和User_relation的关系为1：1的关系，设定目标为frendid，即查询中 userid = frendid
User.belongsTo(User_relation,{foreignKey:'userid',targetKey: 'frendid'});
module.exports = User;
初始化用户朋友关系表
/*
用户ct_user对应的关系表 ct_user_relation
*/
var Sequelize = require('sequelize');
var sequelize = require("../config/sql_config.js");
var User_relation = sequelize.define('ct_user_relation', {
id : {type : Sequelize.INTEGER, autoIncrement : true, primaryKey : true},
userid : {type : Sequelize.STRING, allowNull : false},//用户id
frendid : {type : Sequelize.STRING, allowNull : false}//朋友id
},{
timestamps:false,
freezeTableName:true
});
module.exports = User_relation;查询用户有哪些朋友
var express = require('express');
var router = express.Router();
var User = require("../models/User.js");
var User_relation = require("../models/User_relation.js");
var Sequelize = require('sequelize');
router.post('/contact', function(req, res, next) {
var userid = req.body.userid;
console.log(userid);
User.findAll({
include:[{
model:User_relation,
'where':{
'userid':userid
}
}]
}).then(function(data){
console.log(data);
if(data.length){
res.json({list:data});
}else{
console.log("no frends");
}
res.end();
// console.log(JSON.stringify(data));
}).catch(function(err){
console.log('err'+ err);
});
// res.end();
});
module.exports = router;运行成功后查询结果
