app-xiangsonghua/app-saas-src/script/dao/userMaxMessageIdDao.js
2024-12-26 17:00:06 +08:00

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var userMaxMessageIdDao = Object.create(baseDao);
userMaxMessageIdDao.db = "dianwutong";
userMaxMessageIdDao.table = "user_max_message_id";
userMaxMessageIdDao.selectAll = function(){
var sql = "select * from `" +this.table+ "`";
this.query(sql, function(ret,err){
console.log("userMaxMessageId的所有数据")
console.log(JSON.stringify(ret));
console.log(JSON.stringify(err));
})
}
userMaxMessageIdDao.deleteTable = function(){
var sql = "drop table `" +this.table+ "`";
this.exec(sql, function(ret,err){
console.log('删除表userMaxMessage');
})
}
//创建message表
userMaxMessageIdDao.initTable = function(callback) {
var sql = " CREATE TABLE IF NOT EXISTS `" + this.table + "` ( " +
" `msg_id` INT(11) NOT NULL, " +
" `user_id` INT(11) NOT NULL" +
" )";
this.exec(sql, function(ret, err){
if(callback){
callback(ret, err);
}
});
}
userMaxMessageIdDao.insert = function( userId, msgId, callback){
var sql = "insert into `" + this.table + "`(`user_id`, `msg_id`) values(" +userId+ "," +msgId+ ")";
this.exec(sql, function(ret, err) {
if(callback){
callback();
}
})
}
userMaxMessageIdDao.update = function( userId, msgId, callback ){
var sql = "update `" +this.table+ "` set `msg_id` = " + msgId +" where user_id = "+userId;
this.exec(sql, function(ret, err) {
if(callback){
callback();
}
})
}
userMaxMessageIdDao.updateUserMessageId = function(userId, msgId, callback){
//判断用户是否存在最大id 如果存在 则执行修改操作 否则执行插入操作
var _this = this;
_this.getMaxId(userId, function(maxId){
if(maxId){
_this.update(userId, msgId, function(){
if(callback){ callback() }
})
}else{
_this.insert(userId, msgId, function(){
if(callback){ callback() }
})
}
})
}
userMaxMessageIdDao.getMaxId = function(userId, callback) {
var sql = "select max(msg_id) as max from `" + this.table +"` where user_id = "+userId;
this.query(sql, function(ret,err){
var max = 0;
if(ret && ret.data &&ret.data[0] && ret.data[0].max){
max = ret.data[0].max;
}
if(callback){
callback(max);
}
})
}