我是nodejs的新手。我有“出售”，“购买”和“ liveorderbook”表。我将数据插入到买卖表中之后，买卖表中匹配的数据将转到liveorderbook表中。将数据插入到买卖表后，如果买卖表数据匹配，则显示“待处理状态”，我需要在liveorderbook表中设置“成功状态”，以及如何在买卖表中将“待处理状态”设置为不匹配的数据。这是我的代码
var express = require('express');
var bodyParser = require('body-parser');
var ejs = require('ejs');
var app = express();
var port = 3000;
var mysql = require('mysql');
const http = require('http');
var router = express.Router();
var orders = require('./routes/orders');
var connection = require('express-myconnection');
app.set('view engine','ejs');
app.use(bodyParser.urlencoded({extended:true}));
app.use(bodyParser.json());
var connection = mysql.createConnection({
host: "localhost",
user: "root",
password: "root",
database: "orderbook"
});
app.get('/',function(req,res){
res.render('index');
});
app.get('/orders',function(req,res){
var sql = "SELECT volume , price ,total FROM sell ";
connection.query(sql, function (err, result , fields) {
if (err) {
console.log("error", err)
} else {
res.render('orders', {data:result})
}
});
});
app.get('/buy',function(req,res){
var sql = "SELECT volume , price ,total FROM buy ";
connection.query(sql, function (err, result , fields) {
// console.log('chandu',err,result,fields);
if (err) {
console.log("error", err)
} else {
res.render('buy', {data:result})
}
});
});
app.get('/liveorderbook',function(req,res){
var Query = 'select b.volume, b.price, b.total from buy as b, sell as s where b.price = s.price and s.volume = b.volume';
connection.query(Query, function(err,responce){
console.log('chandu',err,responce)
// res.render('liveorderbook',{data:responce});
if(responce&&responce.length>0){
for (var i = 0; i < responce.length; i++) {
var v=responce[i].volume;
var p=responce[i].price;
var t=responce[i].total;
var sql='INSERT INTO liveorderbook (volume,price,total) SELECT * FROM (SELECT "'+v+'","'+p+'","'+t+'") AS tmp WHERE NOT EXISTS (SELECT volume,price,total FROM liveorderbook WHERE volume ="'+v+'",price= "'+p+'",total="'+t+'")';
connection.query(sql,(err1,res1)=>{
if (err1){
console.log(typeof(err1));
console.log('data not inserted');
}else{
console.log(typeof(res1));
console.log('data inserted');
}
})
}
}
res.render('liveorderbook',{data:responce});
});
//res.render('liveorderbook',{data:res});
});
app.post('/sell',function(req,res){
//Check this log in console, it should print all the values properly, if not issue is at clinet side
console.log('Input:: name='+req.body.box4+' email='+ req.body.box5 +' password='+ req.body.box6, req.body);
var Query = 'INSERT INTO sell (volume,price,total) VALUES ("'+req.body.box4+'","'+req.body.box5+'","'+req.body.box6+'" )';
connection.query(Query, function(err,res){
if(err) {
console.error('Error in sql query:' + Query + ' Err', err);
throw err;
}
});
res.redirect('/');
});
app.post('/buy',function(req,res){
//Check this log in console, it should print all the values properly, if not issue is at clinet side
console.log('Input:: name='+req.body.box1+' email='+ req.body.box2 +' password='+ req.body.box3, req.body);
var Query = 'INSERT INTO buy (volume,price,total) VALUES ("'+req.body.box1+'","'+req.body.box2+'","'+req.body.box3+'" )';
connection.query(Query, function(err,res){
if(err) {
console.error('Error in sql query:' + Query + ' Err', err);
throw err;
}
});
res.redirect('/');
});
app.listen(port, () => {
console.log("Server listening on port " + port);
});
下面给出了出售表图片：enter image description here
