node-query/lib/adapters/pg.js

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'use strict';
let Adapter = require('../Adapter'),
getArgs = require('getargs');
module.exports = class pg extends Adapter {
/**
* Run the sql query as a prepared statement
*
* @param {String} sql - The sql with placeholders
* @param {Array} params - The values to insert into the query
* @param {Function} [callback] - Callback to run when a response is recieved
* @return {void|Promise} - Returns a promise if no callback is provided
*/
execute(/*sql, params, callback*/) {
let args = getArgs('sql:string, [params]:array, [callback]:function', arguments);
// Replace question marks with numbered placeholders, because this adapter is different...
let count = 0;
args.sql = args.sql.replace(/\?/g, () => {
count++;
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return `$${count}`;
});
if (! args.callback) {
return new Promise((resolve, reject) => {
this.instance.query(args.sql, args.params, (err, result) => {
if (err) {
return reject(err);
}
return resolve(result);
});
});
}
return this.instance.query(args.sql, args.params, args.callback);
}
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};