我要检查我的数据的id如果存在于mysql更新它并且如果没有创建它,但是在select结果它不起作用并且去esle部分并且大多数时候创建动作并且得到Duplicate条目错误。最后我通过无限循环运行此文件。 我应该告诉我,当我在redis中有大量数据时会出现这个问题。
如果能帮助我,我会很高兴,谢谢你。)
这是我的代码:
var
mysql = require('mysql'),
redis = require('redis'),
infiniteLoop = require('infinite-loop'),
client = redis.createClient(),
lop = new infiniteLoop,
config = require( __dirname + '/app/Config').config,
con = function() {
return mysql.createConnection({
host : config.db_host,
user : config.db_user,
password : config.db_pass,
database : config.db_name
});
},
insertDB = function( data ) {
var connection = con();
connection.connect( function( err ) {
connection.query( 'SELECT * FROM real_user WHERE id =' + data.id, function( err, res ) {
if ( err ) {
data = JSON.stringify(data);
client.lpush('aipi', data, function(err,reply) {
if ( err ) throw err;
});
}
console.log( "out", data.id, res.length, res );
if ( typeof res != 'undefined' && res.length > 0 ) {
console.log( "update", data.id );
connection.query( 'UPDATE real_user SET ? WHERE id =' + res[0].id, { request_count: data.request_count, updated_at: data.created_at },
function( err, res ) {
if ( err ) throw err;
});
} else {
console.log( "create", data.id );
connection.query( 'INSERT INTO real_user SET ?', data, function( err, res ) {
if ( err ) throw err;
});
}
connection.end();
});
});
},
run = function() {
var data;
client.brpop('aipi', 0, function(err, reply) {
if ( reply[1] ) {
data = JSON.parse(reply[1]);
insertDB(data);
}
});
};
lop.add(run, []).run();
答案 0 :(得分:0)
修正了:
ON DUPLICATE KEY UPDATE
connection.connect( function( err ) {
connection.query( "INSERT INTO real_user SET ? ON DUPLICATE KEY UPDATE updated_at = '" + data.created_at
+ "', request_count = '" + data.request_count + "'",
data, function( err, res ) {
connection.end();
});
});