Ash FrameworkAF
Ash Framework8mo ago
5 replies
pikdum

'fanning out' pub sub broadcasts?

I'm looking for a clean approach for 'fanning out' pub sub broadcasts based on relationships.

For example, if I have:
* teams
* team_members - team_id, user_id
* users
* subscriptions - team_id

If a subscription changes, maybe I'd want to broadcast to all users in that team, with a topic like subscriptions:#{user_id}.

But I'd need to get user_ids from subscription.team.team_members.user_id, not a direct attribute on subscriptions.

Any ideas?
Solution
I don't think there is any great way to do this declaratively right now. You can add a custom notifier that gets each notification (its just a module that implements the notify option) and broadcast it yourself
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