我正在开发流星应用程序。我想在数据库变量更改后重新加载客户端的内容。我正在使用pub-sub。如果状态变量已更改,我想加载内容。
Meteor.publish('activities', function(loggedInUserToken) {
var authObj = AuthenticationToken.findOne({ authToken: loggedInUserToken });
if (authObj) {
var userObj = Users.findOne({ _id: authObj.user_id });
var activities = Activities.find({}, { sort: { createdAt: -1 } });
return activities;
}
return this.ready();
});
Template.masterSku.onCreated(function() {
var instance = this;
instance.autorun(function() {
var loggedInUserToken = "xxxxxxxxxxxxxxxx"
statusSuscription = instance.subscribe("activities", loggedInUserToken);
var activitiesObj = Activities.findOne({}, { sort: { createdAt: -1 } })
if (activitiesObj && activitiesObj.status == "true") {
console.log("Status Changed load Content accordingly")
}
})
答案 0 :(得分:0)
autorun
不会重新计算,除非反应性数据已更改并且在计算中请求此更改。虽然订阅是被动来源,但您还需要检查订阅是否就绪,从而导致新的计算周期:
instance.autorun(function() {
var loggedInUserToken = "xxxxxxxxxxxxxxxx"
var statusSuscription = instance.subscribe("activities", loggedInUserToken);
if (statusSuscription.ready()) { // causes a new compuation by the Tracker
var activitiesObj = Activities.findOne({}, { sort: { createdAt: -1 } })
if (activitiesObj && activitiesObj.status == "true") {
console.log("Status Changed load Content accordingly")
// here you can insert data into a ReactiveVar or ReactiveDict and use
// result in a Template helper, which itself will cause your Template to re-render
}
}
}
答案 1 :(得分:0)
您可以在onCreated函数中使用Tracker,也可以尝试通过帮助器填充数据。
import { Tracker } from 'meteor/tracker';
Tracker.autorun(() => {
var loggedInUserToken = "xxxxxxxxxxxxxxxx"
statusSuscription = instance.subscribe("activities", loggedInUserToken);
var activitiesObj = Activities.findOne({}, { sort: { createdAt: -1 } })
if (activitiesObj && activitiesObj.status == "true") {
console.log("Status Changed load Content accordingly")
}
});