desktop-app/node_modules/db.js

var Datastore = require('nedb');
var path = require('path');
var Evt = require('evt');

// 数据库初始化
// var dbPath = require('nw.gui').App.dataPath + '/nedb';
// var dbPath = Evt.getBasePath() + '/Users/life/Library/Application Support/Leanote' + '/nedb';
// nedb2 为了port
var dbPath = Evt.getBasePath() + '/nedb55';
// console.error(dbPath);

// test
if(dbPath.length < 6) {
	var dbPath = '/Users/life/Library/Application Support/Leanote' + '/nedb2';
}

// 加载DB, 为noteHistories
Datastore.prototype.loadDB = function(callback) {
    var me = this;
    if (this.__loaded) {
        callback();
    } else {
        this.loadDatabase(function (err) {
            me.__loaded = true;
            callback(err);
        });
    }
};

// console.log(dbPath);
// g, 表全局环境
var db = {
    init: function () {
        var dbNames = ['users', 'notebooks', 'notes', 'tags', 'images', 'attachs', 'noteHistories', 'g'];
        this._init(dbNames);
    },

    initForLogin: function () {
        // var dbNames = ['users'];
        var dbNames = ['users', 'notebooks', 'notes', 'tags', 'noteHistories'];
        this._init(dbNames);
    },

    _init: function (dbNames) {
        var me = this;
        for(var i in dbNames) {
            var name = dbNames[i];
            var p = path.join(dbPath, name + '.db');
            (function (name) {
                // 这部分非常慢!, 会卡界面
                me[name] = new Datastore({ filename: p, autoload: name != 'noteHistories' , onload: function () {
                    console.log(name + ' is loaded');
                }});
            })(name);
        }
        console.log('db inited');
    }
};

module.exports = db;