modm/lib/model.js

A MongoDB Object Document Mapper (ODM)

var Events = require("events").EventEmitter;
var interFace = require("./apis/mongodb");

function extend(object, inherit) {

    var Model = function(properties) {

        for (var property in properties) {

            if (properties.hasOwnProperty(property)) {
                this[property] = properties[property];
            }
        }
    };

    Model.prototype = inherit || {};
    object = new Model(object);

    return object;
}

function ensureIndexes() {

    var self = this;

    // get index informations
    this.indexInformation(function(err, indexInfo) {

        if (err) {
            return self.emit("modmError", err);
        }

        for (var i in self._schema.indexes) {

            // create the index, if it not exists
            if (!indexInfo[self._schema.indexes[i][1].name]) {

                // create indexes
                self.createIndex(self._schema.indexes[i][0], self._schema.indexes[i][1], function(err, result) {

                    if (err) {
                        return self.emit("modmError", err);
                    }

                    self.emit("modmIndexCreated", result);
                });
            }
        }
    });
}

function Model(db, collectionName, schema) {

    var model = extend(interFace, new Events());
    model.db = db;
    model.collection = collectionName;
    model._schema = schema;

    // create indexes in the background
    if (model.db.options.autoIndex && model._schema.indexes) {
        ensureIndexes.call(model);
    }

    return model;
}

module.exports = Model;