collections - 如何将项目添加到 RacerJs DerbyJs 中的集合？

Question

我想使用 RacerJs/DerbyJs 将项目添加到集合中，但它不起作用。我一定是真的忽略了一些东西......

我尝试过的

model.set('news', [
    { text: "something" }
]);

那确实设置了一个新闻项目。然而，当我另一次这样做时，它只会覆盖现有项目，不会添加新项目。怎么做？

model.push('news', {text:"someText"}) 也因“对象不是数组”而失败。

基本上，我只想要“发布更新并在‘wall’应用程序上显示”的最基本版本，没有任何房间，也没有使用数组。只有一个集合，仅此而已。

.push() 变体的堆栈跟踪:

Wed May 22 2013 09:35:24 GMT+0200 (W. Europe Daylight Time) (23168) d7564d2d-f238-4ce0-a0a2-6e376e9b5cb1 ? ver: 0 - push 'news', { text: 'adsf' }C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\Memory.js:185    throw new TypeError(arr + ' is not an Array');          ^TypeError: [object Object] is not an Array    at Object.arrayLookupSet [as _arrayLookupSet] (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\Memory.js:185:11)    at Object.applyArrayMethod [as _applyArrayMethod] (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\Memory.js:145:18)    at Object.push (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\Memory.js:118:15)    at applyTxn (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\transaction.js:114:32)    at Object.exports.applyTxnToDoc (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\transaction.js:126:3)    at Function.QueryInterface.publish (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\adapters\pubsub-memory\channel-interface-query.js:25:24)    at PubSub.publish (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\pubSub\PubSub.js:63:10)    at Store.module.exports.proto.publish (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\pubSub\pubSub.Store.js:174:20)    at publish (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\txns\txns.Store.js:230:15)    at next (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\middleware.js:7:26)    at module.exports.events.middleware.txn (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\txns\txns.Store.js:220:11)    at Store._sendToDb.lockingDone (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\Store.js:294:12)    at mergeAll.setupRoutes (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\adapters\db-memory\index.js:70:13)    at DbMemory.mergeAll.get (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\adapters\db-memory\index.js:44:5)    at mergeAll.setupRoutes (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\adapters\db-memory\index.js:62:16)    at DbMemory.mergeAll.get (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\adapters\db-memory\index.js:44:5)    at mergeAll.setupRoutes (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\adapters\db-memory\index.js:60:14)    at next (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\Store.js:321:15)    at Store._sendToDb (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\Store.js:324:10)    at writeToDb (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\txns\txns.Store.js:216:15)    at next (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\middleware.js:7:26)    at serialEmitPrep (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\txns\txns.Store.js:125:9)    at next (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\middleware.js:7:26)    at incrVer (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\modes\lww.js:18:12)    at next (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\middleware.js:7:26)    at Object.module.exports.events.init.store.eachContext.context.guardWrite (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\accessControl\accessControl.Store.js:54:51)    at accessController (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\txns\txns.Store.js:103:17)    at next (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\middleware.js:7:26)    at Object.run (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\middleware.js:10:12)    at Socket.module.exports.events.socket (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\txns\txns.Store.js:267:26)    at Socket.racer.log.sockets.sockets.on.socket.on (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\lib\log.server.js:150:20)    at Socket.EventEmitter.emit [as $emit] (events.js:91:17)    at SocketNamespace.handlePacket (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\namespace.js:335:22)    at Manager.onClientMessage (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\manager.js:488:38)    at WebSocket.Transport.onMessage (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transport.js:387:20)    at Parser. (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:39:10)    at Parser.EventEmitter.emit (events.js:88:17)    at opcodeHandlers.1.finish (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:288:16)    at Parser.opcodeHandlers.1.expectData [as expectHandler] (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:299:15)    at Parser.add (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:466:24)    at Parser.expect (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:499:10)    at Parser.opcodeHandlers.1.expectData (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:298:18)    at Parser.add (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:466:24)    at Parser.expect (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:499:10)    at opcodeHandlers.1.expectData (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:296:16)    at opcodeHandlers.1 (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:313:9)    at Parser.processPacket (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:533:8)    at Parser.add (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:466:24)    at Socket.WebSocket.onSocketConnect (C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:141:17)    at Socket.EventEmitter.emit (events.js:88:17)    at TCP.onread (net.js:396:14)

Answer 1

如果您尝试将文档添加到集合中，您也可以调用 model.add

model.add('news', {
  text: "Something" 
})

这将向新闻 集合添加一个新文档并为您生成 id。更多文档可以在 http://derbyjs.com/#getters_and_setters 下找到