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我想在流星集合中找到()。fetch(),但是當我在回調中調用此代碼(或直接在控制檯中,它返回[ ])。流星收集findOne回調undefined時調用回調
MyClass = class MyClass {
constructor() {
this.worker = null;
this._init();
console.log(Site.MyCollection.find().fetch()); //Logs the array of documents
}
_init() {
this.worker = new Worker('my-web-worker.js');
this.worker.addEventListener('message', this._onMessage, false);
this.worker.postMessage({ cmd: 'start', data: Site.MyCollection.find().fetch() }); //Works fine, the Web Worker receives the array of documents as expected
}
_onMessage(e) {
console.log(Site.MyCollection.find().fetch()); //Logs []
}
}
沒有任何地方,我從集合中移除任何文件,所以我不能確定這是否是一個安全功能,或者以某種方式集合創建後擦拭。
要創建(虛擬)集合,我這樣做(在客戶端和服務器上)
Site.MyCollection = new Mongo.Collection("my-collection");
Site.MyCollection.remove();
let docs = [
{name:"One", data : ["a", "b", "c"}},
{name:"Two", data : ["e", "f", "g"}},
{name:"Three", data : ["h", "i", "j"}},
{name:"Four", data : ["k", "l", "m"}}
];
_.each(docs, function(doc){
Site.MyCollection.insert(doc);
});