modm/lib/convert.js

A MongoDB Object Document Mapper (ODM)

var ObjectId = require("mongodb").ObjectID;
var moment = require("moment");

function convert(options, value) {

    var type = options.type;

    if (typeof value === "string") {

        // convert to number
        if (type === "number") {
            if (value.indexOf(".") > -1) {
                value = parseFloat(value, 10);
            } else {
                value = parseInt(value, 10);
            }

            return isNaN(value) ? new Error("Number conversion failed.") : value;
        }

        // convert to boolean
        if (type === "boolean") {

            if (value === "false" || value === "0") {
                return false;
            }

            if (value === "true" || value === "1") {
                return true;
            }

            return new Error("Boolean conversion failed.");
        }

        // convert to objectid
        if (type === "objectid") {
            try {
                value = ObjectId(value);
            } catch (err) {
                value = new Error("ObjectId conversion failed: " + value);
            }

            return value;
        }
    }

    if (value && value.constructor.name !== "Date" && type === "date") {

        if (options.parse) {
            value = moment(value, options.parse).toDate();
        } else {
            value = new Date(value);
        }

        if (isNaN(value.valueOf())) {
            return new Error("Date conversion failed: " + value);
        }

        return value;
    }

    return value;
}

module.exports = convert;