mysql.js
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const mysql = require('mysql');
const _ = require('lodash');
class MysqlAdapter {
constructor(connect, database) {
this.connect = connect;
this.database = database;
this.createPool();
}
createPool() {
this.pool = mysql.createPool(Object.assign(this.connect, {
database: this.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) {
reject(connErr);
} else {
resolve(connection);
}
});
});
}
query(sql, params, options) {
return this.execute(sql, params, options);
}
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;
});
}
async execute(sql, params, options = {}) {
return new Promise((resolve, reject) => {
this.getConnection().then(connection => {
connection.query(sql, params, (queryErr, result) => {
connection.release();
if (queryErr) {
reject(queryErr);
} else {
resolve(result);
}
});
}).catch(e => {
reject(e);
});
});
}
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();
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();
}
}
module.exports = MysqlAdapter;