tim2CF
Phoenix pubsub asterisk symbol support?
Let’s say we have a code
iex(1)> Phoenix.PubSub.subscribe Foo.PubSub, "user:*"
:ok
iex(2)> :erlang.process_info(self, :messages)
{:messages, []}
iex(3)> Phoenix.PubSub.broadcast Foo.PubSub, "user:1", :foo
:ok
iex(4)> :erlang.process_info(self, :messages)
{:messages, []}
Looks like phoenix_pubsub does not support asterisk symbol - "user:*" or "user.*" not worked for me. Is there any fundamental reason why it don’t support this functionality? Will be very useful for models/topics with big amount of fields (where amount of possible permutations is huge) like "user.*.currency.BTC.country.*"
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benwilson512
easco
I believe the ability to use the * wildcard is a feature of Phoenix Channels, and not built into the PubSub system itself. When creating a channel you can tell Phoenix that you want a particular Channel module to handle all the broadcast messages matching a particular pattern, but I don’t think you can subscribe to a PubSub with wildcards.
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