Collections 如何在RacerJs DerbyJs中将项目添加到集合中？

我想使用RacerJs/DerbyJs将一个项目添加到集合中，但它就是不起作用。我一定是忽略了什么

我试过的

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

这确实设置了一个新闻项目。但是，当我下次这样做时，它只会覆盖现有项，而不会添加新项。怎么做

model.push（'news'，{text:“someText”}）

也会因“对象不是数组”而失败

基本上，我只想要最基本版本的“发布更新并在‘墙’上显示”应用程序，不需要任何房间，也不需要使用阵列。只有一个系列，就这样

.push（）变量的堆栈跟踪：

Wed May 22 2013 09:35:24 GMT+0200 (W. Europe Daylight Time) (23168) d7564d2d-f23
8-4ce0-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)
2013年5月22日星期三09:35:24 GMT+0200（欧洲西部昼时）（23168）d7564d2d-f23
8-4ce0-a0a2-6e376e9b5cb1？版本：0-推送“新闻”{text:'adsf'}
C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\
Memory.js:185
抛出新类型错误（arr+'不是数组'）；
^
TypeError:[对象]不是数组
在Object.arraylookupper[as Arraylookupper]（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\Memory.js:185:11）
在Object.applyArrayMethod[作为_applyArrayMethod]（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\Memory.js:145:18）
在Object.push（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\Memory.js:118:15）
在applyTxn（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\transaction.js:114:32）
在Object.exports.applyTxnToDoc（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\transaction.js:126:3）
在Function.QueryInterface.publish（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\adapters\pubsub memory\channel interface query.js:25:24）
在PubSub.publish（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\PubSub\PubSub.js:63:10）
在Store.module.exports.proto.publish（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\pubSub\pubSub.Store.js:174:20）
发布时（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\txns\txns.Store.js:230:15）
下一步（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\middleware.js:7:26）
位于module.exports.events.middleware.txn（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\txns\txns.Store.js:220:11）
在Store.\u sendToDb.lockingDone（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\Store.js:294:12）
在mergeAll.setupRoutes（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\adapters\db memory\index.js:70:13）
在DbMemory.mergeAll.get（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\adapters\db memory\index.js:44:5）
在mergeAll.setupRoutes（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\adapters\db memory\index.js:62:16）
在DbMemory.mergeAll.get（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\adapters\db memory\index.js:44:5）
在mergeAll.setupRoutes（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\adapters\db memory\index.js:60:14）
下一步（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\Store.js:321:15）
在Store.\u sendToDb（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\Store.js:324:10）
在writeToDb（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\txns\txns.Store.js:216:15）
下一步（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\middleware.js:7:26）
在serialEmitPrep（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\txns\txns.Store.js:125:9）
下一步（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\middleware.js:7:26）
在服务器上（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\modes\lww.js:18:12）
下一步（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\middleware.js:7:26）
位于Object.module.exports.events.init.store.eachContext.context.guardWrite（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\accessControl\accessControl.store.js:54:51）
在accessController（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\txns\txns.Store.js:103:17）
下一步（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\middleware.js:7:26）
在Object.run（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\middleware.js:10:12）
位于Socket.module.exports.events.Socket（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\txns\txns.Store.js:267:26）
位于Socket.racer.log.sockets.sockets.on.Socket.on（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\lib\log.server.js:150:20）
在Socket.EventEmitter.emit[作为$emit]（events.js:91:17）
位于SocketNamespace.handlePacket（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\node\u modules\socket.io\lib\namespace.js:335:22）
位于Manager.onClientMessage（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\node\u modules\socket.io\lib\Manager.js:488:38）
在WebSocket.Transport.onMessage（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node\u modules\derby\node\u modules\racer\node\u modules\socket.io\lib\Transport.js:387:20）
在解析器处。（C:\xampp\htdocs\Derbyjs\KnowEdge\app1\node_modules\derby\node_modules\racer\node_modules\socket.io\lib\transports\websocket\hybi-16.js:39:10）
位于Parser.EventEmitter.emit（events.js:88:17）
在op
model.set('news.' + model.id(), {
  text: "something"
})

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