Neurosync —— JavaScript 本地离线 ORM 库

Neurosync 是一个 JavaScript ORM 库，支持离线和实时操作。没错，是 ORM，但并没有疯狂到直接连接到后台数据库。对 Neurosync 来说，数据库就是后端的 REST API，而 Neurosync 就是这个 API 的一个门面。

Neurosync 的生命周期非常简单：

• 保存数据变更到本地存储

• 发起 REST 请求

• 如果请求成功则删除本地存储中的变更数据，标识为已保存，并发布到实时 API

• 如果请求失败，因为应用本身是离线的，将等待应用在线并继续处理数据更改流程

• 如果有待决的操作但是应用重启了，数据将会被恢复

一个简单的 TODO 应用示例代码：

var Todo = Neuro({    name: 'todo',    api: '/api/1.0/todo/',    fields: ['name', 'finished_at'],    timestamps: true,    comparator: ['-finished_at', '-created_at'], // finished go to bottom, most recently created are at the top    methods: {      finish: function(finished) {        this.$save('finished_at', finished ? Date.now() null);      }    },    dynamic: {      done: function() {        return !this.finished_at;      }    }  });    var t0 = Todo.create({name: 'Download Neurosync'});  t0.$isSaved(); // true  t0.finish( true );  t0.done; // true  t0.$remove();    var t1 = new Todo({name: 'Use Neurosync'});  t1.$isSaved(); // false  t1.id; // UUID  t1.$save();    var t2 = Todo.boot({id: 34, name: 'Profit'}); // Todo data that already exists remotely  t2.$isSaved(); // true  t2.name = '???';  t2.$hasChanges(); // true    var t3 = Todo.fetch(45); // REST call if doesn't exist locally    Todo.all(); // [t1, t2, t3]    Todo.collect(t1, t2); // creates a collection of todos    var allRemote = Todo.fetchAll(function(all) {}); // call REST API    var f0 = Todo.find('name', 'Download Neurosync'); // first match  var f1 = Todo.find({done: true});    var w0 = Todo.where('done', true); // all done todos  var w1 = Todo.where({finished_at: null});    var g0 = Todo.get(34); // get cached version    var g1 = Todo.grab(34); // get cached version, otherwise call REST API  var a0 = Todo.grabAll(function(all) {}); // get all cached, if none cached call REST API    Todo.ready(function() {}); // when it has been initialized locally and/or remotely (depends on options).    Todo.refresh(); // re-fetch from REST API    var search0 = Todo.search({done: true}); // sends a search to the REST API (POST by default)    var searchPaged0 = Todo.searchPaged({done: true, page_offset: 0, page_size: 20});  searchPaged0.$next();