waitOn equivalent

[mathieutozer]

In iron-router I would have done something like this to ensure my subscriptions are ready before rendering.

this.route('event', {
    path: '/event/:_id',
    waitOn: function () {
        //Meteor.subscribe('event', this.params._id);
        Meteor.subscribe('countries');
        Meteor.subscribe('players', this.params._id);
        Meteor.subscribe('votes', this.params._id);
        Meteor.subscribe('results', this.params._id);
        return Meteor.subscribe('events');
    },
    data: function () {
        var anEvent = Events.findOne(this.params._id);
        return anEvent;  
    },
    action: function() {
        if (this.ready()) {
            this.render()  
        } else {
            this.render('loading');
        }
    }
});

I've dug a bit into the documentation and the example code, and even the source, but don't see how to do this. Is this possible yet?

[mystor]

It IS possible, but I haven't written a nice API for it yet.

If you look at gh-release-watch, I wait on the subscription object for the unsubscribe page: https://github.com/mystor/gh-release-watch/blob/master/routes.js#L44

Basically, by calling the subscription, and then immediately asking if it is ready, you can tell whether it is ready yet, and then instead of loading a normal page, load a loading page.

At some point, I will probably add a syntax for waitOn, but I haven't gotten there yet.

[mathieutozer]

Thanks that works!

[mystor]

I think I'll mark this as closed for now, until I come up with a good mechanism to enable people to write this type of code.

The current system isn't that bad, it could use some extra documentation though.