先跟大家拜个年!各位过年好。
然后
直接上代码吧
server.js
var resu;
var db = require("./dbs.js");
var http=require("http");
var data = [
'OrderNO',
'DATE_FORMAT( OrderDate , "%Y-%m-%d")OrderDate',
'c.CustomName',
'(select count(Quantity) from SalesInfo where OrderNo=s.OrderNO)Quantity',
'(select sum(Money) from SalesInfo where OrderNo=s.OrderNO)Money',
'OrderStatus',
'SalesInfo as s left join Customer as c on s.CustomID=c.CustomNo',
'1=1'
]
var server=http.createServer(function(req,res){
if(req.url!=="/favicon.ico"){
db.searchDb(data,function(error,resultData){
res.writeHead(200,{"Content-Type":"text/plain","Access-Control-Allow-Origin":"*"});
if(error){
//返回错误信息
res.write(error);
}else{
resu=JSON.stringify(resultData);
res.write(resu);
}
res.end();
});
}
});
server.listen(1338,"localhost",function(){
console.log("开始监听...");
});
dbs.js
exports.searchDb =function (sqldata,resultCallback){
var Mysql = require('node-mysql-promise');
var mysql = Mysql.createConnection({
host: 'qdm1.my3w.com',
user: 'qdm1',
password: '1qE',
database:'qdm11_db'
});
//SELECT * FROM table;
//mysql.table('SalesInfo').field('OrderNO,OrderDate,CustomID,Quantity,Money,OrderStatus').select().then(function (data)
mysql.query('SELECT DISTINCT %s,%s,%s,%s,%s,%s FROM %s WHERE %s',sqldata).then(function (data)
{
//return data;
console.log(data);
resultCallback(null,data);
}).catch(function (e) {
console.log(e);
resultCallback(e);
});
}
现在遇到的问题是:当地一次点击查询时是没有问题的 当再点一次查询按钮就会报错说sql句有问题。。mysql.query()这里报错
大神帮我看下是不是我callback写的有问题呢 跪谢!
补充下错误信息
c:\Users\lenovo\WebstormProjects\bootstrap>node myserver.js
开始监听...
[ RowDataPacket {
OrderNO: '20160127123450552',
OrderDate: '2016-01-27',
CustomName: '冯硕',
Quantity: 1,
Money: 1500,
OrderStatus: '1' },
RowDataPacket {
OrderNO: '20160205432183109',
OrderDate: '2016-02-05',
CustomName: '刘洋',
Quantity: 2,
Money: 3100,
OrderStatus: '1' } ]
{ [Error: ER_PARSE_ERROR: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT DISTINCT %s,%s,%s,%s,%s,%s FROM %s WHERE %s,OrderNO,DATE_FORMAT( OrderDat' at line 1]
code: 'ER_PARSE_ERROR',
errno: 1064,
sqlState: '42000',
index: 0 }
我在手机上粗略看了看,问题应该是出在try catch上,等回家再仔细看看