node-query/lib/adapters/Mysql/mysql2.js

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2014-10-23 10:53:16 -04:00
'use strict';
const Adapter = require('../../Adapter');
const Result = require('../../Result');
const Helpers = require('../../Helpers');
const mysql2 = require('mysql2/promise');
class Mysql extends Adapter {
constructor (config) {
const instance = mysql2.createConnection(config);
super(instance);
}
/**
* Transform the adapter's result into a standard format
*
* @param {*} result - original driver result object
* @return {Result} - standard result object
*/
transformResult (result) {
// For insert and update queries, the result object
// works differently. Just apply the properties of
// this special result to the standard result object.
if (Helpers.type(result) === 'object') {
let r = new Result();
Object.keys(result).forEach(key => {
r[key] = result[key];
});
return r;
}
return new Result(result);
}
/**
* Run the sql query as a prepared statement
*
* @param {String} sql - The sql with placeholders
* @param {Array|undefined} params - The values to insert into the query
* @return {Promise} Result of query
*/
execute (sql, params) {
return this.instance
.then(conn => conn.execute(sql, params))
.then(result => this.transformResult(result));
}
}
module.exports = Mysql;