documentation/adapters_Sqlite_dblite.js.html from timw4mail/node-query

documentation/adapters_Sqlite_dblite.js.html
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    <h1 class="page-title">Source: adapters/Sqlite/dblite.js</h1>

    



    
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            <pre class="prettyprint source linenums"><code>const Adapter = require('../../Adapter');
const Result = require('../../Result');
const Helpers = require('../../Helpers');
const dbliteAdapter = require('dblite');

class SqliteDblite extends Adapter {
    constructor (config) {
        const file = (Helpers.isString(config)) ? config : config.file;

        const instance = new Promise((resolve, reject) => {
            const conn = dbliteAdapter(file);

            // Stop the stupid 'bye bye' message being output
            conn.on('close', () => {});

            conn.on('error', err => {
                reject(err);
            });

            // Make sure to actually pass on the connection!
            return resolve(conn);
        });

        super(instance);
    }

    /**
     * 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
     * @return {Promise} - Returns a promise if no callback is provided
     */
    execute (sql, params) {
        return this.instance.then(conn => new Promise((resolve, reject) => {
            return conn.query(sql, params, (err, rows) => {
                if (err) {
                    return reject(err);
                }
                return resolve(this.transformResult(rows));
            });
        }));
    }

    /**
     * Transform the adapter's result into a standard format
     *
     * @param {*} originalResult - the original result object from the driver
     * @return {Result} - the new result object
     */
    transformResult (originalResult) {
        return new Result(originalResult);
    }

    /**
     * Close the current database connection
     *
     * @return {void}
     */
    close () {
        this.instance.then(conn => conn.close());
    }
}

module.exports = SqliteDblite;
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