elixir phoenix pubsub wildcard topic

Question

when using phoenix pubs directly is there a way for subscribing to a topic with partial match, e.g. something like "user:*"?

just for illustration sake, the following code:

Phoenix.PubSub.subscribe("my_pubsub", "user:*")

should match all the following events:

Phoenix.PubSub.broadcast("my_pubsub", "user:123", "banana")
Phoenix.PubSub.broadcast("my_pubsub", "user:911", "apple")
Phoenix.PubSub.broadcast("my_pubsub", "user:", "orange")

user_126741 · Answer

Phoenix.PubSub.subscribe does not support wildcard topics. As noted in the Phoenix Docs, and by this answer by Chris McCord, channels and topics can have wildcards in the strings, but subscriptions cannot.

elixir phoenix pubsub wildcard topic

1 Answers