Meteor related subscriptions in React

help
1

getMeteorData() {
const recentGroupSubs = Meteor.subscribe(‘recentGroups’);

if (recentGroupSubs.ready()) {

  // get published groups ids
  const groupIds = _.pluck(Groups.find().fetch(), '_id');

 // subscribe for only found group messages
  
  Meteor.subscribe('messages', groupIds);

}
}

Obviously this will cause recursive loop. But what i mean by this is how can i solve this kind of (related subscription) problem.

2

Don’t pass groupIds to the server, just get them in your messages subscription. I’m not sure this would be reactive though, so think about using publish-composite.

3

@fvg thanks for your reply. I know publish-composite. This is a example code to demonstrate my question. In my real code my publication code is quite big. So i thought that i should split one big publication to 2 small ones. And I am just curious that is this possible to solve this kind of problem in react component.

1 Like
4

I was on the phone before and didn’t really have a look at your code. Without trying I don’t see any problems with it. What about something like this?

getMeteorData() {
  var groupsSub = Meteor.subscribe('recentGroups');

  var data = {
    groups: Groups.find().fetch(),
    groupsLoaded: groupsSub.ready(),
    messages: [],
    messagesLoaded: false
  };

  if (data.groupsLoaded) {

    // get published groups ids
    var groupIds = _.pluck(data.groups, '_id');

    // subscribe for only found group messages    
    var messagesSub = Meteor.subscribe('messages', groupIds);

    data.messages = Messages.find().fetch();
    data.messagesLoaded = messagesSub.ready();
  }

  return data;
}

(CoffeeScript user, so I removed all consts :wink:

5

@fvg thanks. It is working