[编辑]更新到地面DB V2,由代码更易读流星阵营:GroundDB突然空
我想在我的项目中使用GroundDB,所以我的流星反应的科尔多瓦应用程序也可以离线运行。在主容器中,我有以下代码:
let fullyLoaded = new ReactiveVar(false);
let subscribed = false;
let subscribedOnce = false;
let checking = false;
export default createContainer(() => {
if(Meteor.status().connected && !subscribedOnce && !subscribed){
subscribed = true;
console.log("subscribing");
Meteor.subscribe("localization",
()=> {
localizationGrounded.keep(Localization.findNonGrounded());
console.log("everything has been loaded once.");
console.log("Localization count after subscription: " + Localization.find().fetch().length);
fullyLoaded.set(true);
subscribed = false;
subscribedOnce = true;
}
);
}
if(fullyLoaded.get()){
console.log("Localization Count: " + Localization.find().fetch().length)
}
return {
isLoggedIn: !!Meteor.userId(),
isLoading: !fullyLoaded.get() || subscribed,
};
}, Main);
此代码应该订阅“本地化”,如果它尚未加载已经。本地化收集的实现如下,查找()和findOne()方法已被覆盖调用find()方法用于接地DB:
export const Localization = new Mongo.Collection('localization');
if(Meteor.isClient){
export let localizationGrounded = new Ground.Collection('localization', {
cleanupLocalData: false
});
//rename find() to findNonGrounded
Localization.findNonGrounded = Localization.find;
localizationGrounded.observeSource(Localization.findNonGrounded());
Localization.find = function(...args){
console.log("finding from ground db");
return localizationGrounded.find(...args);
};
Localization.findOne = function(...args){
console.log("finding one from ground db");
return localizationGrounded.findOne(...args);
}
}
然而,这将产生以下输出:
subscribing
everything has been loaded once
finding from ground db
Localization count after subscription: 28
finding from ground db
Localization count: 28
看起来很好,对吧?不幸的是,createContainer()函数在此之后立即被调用,导致
...
Localization count: 28
//Lots of "finding one from ground db" indicating the page is being localized correctly
finding from ground db
Localization Count: 0
//more "finding one from ground db", this time returning undefined
请帮我解决这个问题。 在此先感谢
Taxel