Hi! Thanks for submitting your question. It does in fact look like there is a mistake in that code! The correct case
statement should read like this:
case Presence.get_by_key("user_activity", product.name) do
[] ->
Presence.track(
pid,
"user_activity",
product.name, %{users: [%{email: user.email}]}
)
%{metas: [%{users: active_users_for_product}]} ->
Presence.update(pid, "user_activity", product.name, %{
users: [active_users_for_product | %{email: user.email}]
})
end
You’ll find that updated in the next Beta release. In the meantime, you can copy in the correction from this comment.