mysql.js
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const mysql = require('mysql');
const _ = require('lodash');
class SqlHelper {
constructor(database) {
this.config = global.yoho.config.mysql;
this.logger = global.yoho.logger;
database = database || 'mysql';
this.createPool(database);
}
createPool(database) {
this.pool = mysql.createPool(Object.assign(this.config.connect, {
database,
queryFormat: function(query, values) {
if (!values) {
return query;
}
return query.replace(/\:(\w+)/g, function(txt, key) {
if (values.hasOwnProperty(key)) {
return this.escape(values[key]);
}
return txt;
}.bind(this));
},
connectTimeout: 2000
}));
}
getConnection() {
return new Promise((resolve, reject) => {
this.pool.getConnection((connErr, connection) => {
if (connErr) {
this.logger.error(connErr);
reject(connErr);
} else {
resolve(connection);
}
});
});
}
query(sql, params) {
return this.execute(sql, params);
}
delete(sql, params) {
return this.execute(sql, params).then(result => {
return result.affectedRows;
});
}
update(sql, params) {
return this.execute(sql, params).then(result => {
return result.changedRows;
});
}
insert(sql, params) {
return this.execute(sql, params).then(result => {
return result.insertId;
});
}
execute(sql, params) {
return new Promise((resolve, reject) => {
this.getConnection().then(connection => {
connection.query(sql, params, (queryErr, result) => {
connection.release();
if (queryErr) {
this.logger.error(queryErr);
reject(queryErr);
} else {
resolve(result);
}
});
});
});
}
transaction(sqls, cb) {
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();
this.logger.error(queryErr);
rej(queryErr);
} else {
cb && cb(sql); // eslint-disable-line
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(() => {
this.logger.log('end');
});
}
}
module.exports = SqlHelper;