mysql.js
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const config = global.yoho.config.mysql;
const logger = global.yoho.logger;
const mysql = require('mysql');
const _ = require('lodash');
let sqlHelper = {
database: config.database,
_createPool(database) {
database = database || 'mysql';
this.pool = mysql.createPool(Object.assign(config.connect, {
database
}));
},
getConnection() {
return new Promise((resolve, reject) => {
this.pool.getConnection((connErr, connection) => {
if (connErr) {
logger.error(connErr);
reject(connErr);
} else {
resolve(connection);
}
});
});
},
baseConenction(sql) {
return new Promise((resolve, reject) => {
this.getConnection().then(connection => {
connection.query(sql, (queryErr, result) => {
connection.release();
if (queryErr) {
logger.error(queryErr);
reject(queryErr);
} else {
resolve(result);
}
});
});
});
},
query(sql) {
return this.baseConenction(sql);
},
delete(sql) {
return this.baseConenction(sql).then(result => {
return result.affectedRows;
});
},
update(sql) {
return this.baseConenction(sql).then(result => {
return result.changedRows;
});
},
insert(sql) {
return this.baseConenction(sql).then(result => {
return result.insertId;
});
},
execute(sql) {
return this.baseConenction(sql);
},
transaction(sqls) {
return new Promise((resolve, reject) => {
this.getConnection().then(connection => {
let promises = _.map(sqls, sql => {
return new Promise((res, rej) => {
connection.query(sql, (queryErr, result) => {
if (queryErr) {
connection.rollback();
logger.error(queryErr);
rej(queryErr);
} else {
res(result);
}
});
});
});
Promise.all(promises).then(results => {
connection.commit(err => {
if (err) {
connection.rollback(() => {
connection.release();
});
reject();
} else {
connection.release();
resolve(results);
}
});
}, () => {
reject();
});
});
});
},
changeDatabase(database) {
return new Promise(resolve => {
this.pool.end(() => {
this._createPool(database);
resolve();
});
});
},
close() {
this.pool.end(() => {
logger.log('end');
});
}
};
sqlHelper._createPool();
module.exports = sqlHelper;