ActionCable broadcast_to not reaching user - ruby-on-rails

Question

I have a basic setup with rails + devise + actioncable.
I basically want to send notifications directly and privately to currently signed-in user. My code looks like follows:
connection.rb
module ApplicationCable
class Connection < ActionCable::Connection::Base
identified_by :current_user
def connect
self.current_user = find_verified_user
logger.add_tags 'ActionCable', current_user.email
end
private
def find_verified_user
if verified_user = env['warden'].user
verified_user
else
reject_unauthorized_connection
end
end
end
end
notifications_channel.rb
class NotificationsChannel < ApplicationCable::Channel
def subscribed
stream_from current_user
end
end
And it all works just fine. Client get's connected and i can see in the logs he is correctly logged in. Also, i can see a following input in the rails console:
[ActionCable] [admin#example.com] Registered connection (Z2lkOi8vcHJpc21vL1VzZXIvMQ)
[ActionCable] [admin#example.com] NotificationsChannel is transmitting the subscription confirmation
[ActionCable] [admin#example.com] NotificationsChannel is streaming from #<User:0x00007f87f4180b68>
However, when trying to send a notification to this user using a code below, it seems the event is not reaching the user (no errors present!):
2.5.1 :010 > NotificationsChannel.broadcast_to(User.first, test: 'foo')
[ActionCable] Broadcasting to notifications:Z2lkOi8vcHJpc21vL1VzZXIvMQ: {:test=>"pass"}
=> nil
And my javascript consumer logs nothing:
let cable = ActionCable.createConsumer(`ws://mydomain.com/cable`)
let actions = {
received(payload) {
console.log(payload) // <== this line logs nothing!
}
}
cable.subscriptions.create('NotificationsChannel', actions)
Have i done anything wrong in here?

Answer 1

It's likely because you are using stream_from instead of stream_for. When referencing an object (model) rather than a string in your channel, you should use stream_for. Try and do this in notifications_channel.rb:
class NotificationsChannel < ApplicationCable::Channel
def subscribed
stream_for current_user
end
end
Here is a reference to the documentation: https://api.rubyonrails.org/classes/ActionCable/Channel/Streams.html#method-i-stream_for