Meteor Publish reactive to collection findOne

1

This code publishes some documents from ActiveTaskCol based on a given projection as shown.
I need to re-run this publish when ActiveTaskCol.insert(… takes place anywhere else in the project, since the value of currentAction will change.
I thought it will by reactive but I was wrong. How can this be achieved?
I tried to wrap the code in autorun function for no avail :frowning:
Thanks

Server.js

Meteor.publish('attributes', function () {
  var currentAction = ActiveTaskCol.findOne({}, {fields: {action:1}, sort: {createdAt: -1}, limit: 1}).action;
  return Attributes.find({action: currentAction});
});
2

Yeah that won’t work because you did a findOne, and therefore that value will never update. Use reywood:publish-composite.

Meteor.publishComposite('active', function () {
  return {
    find() {
      return ActiveTaskCol.find({}, {
        limit: 1,
        fields: { action: 1 },
        sort: { createdAt: -1 }
      });
    },
    children: [{
      find(active) {
        return Attributes.find({ action: active.action });
      }
    }]
  }
});
1 Like
3

works good. Thank you
Could you please write it in ecmaScript 5 since ecmaScript 6 is not fully supported by mobile browsers support table

4

you can use ecmascript package for this

5

Don’t worry. Meteor handles ES6 and compile it down to ES5.

6

How does it know when to do that, do I have control over this??

7

Basically, it always does.

8

Because ES6 is fully compatible with ES5, Meteor just compile all js codes in your project if you use package ecmascript.

1 Like