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Realtime browser updates with Cable Ready Discussion

Great episode.

Just as a note to anybody watching this who might be wondering, cable_ready pairs perfectly well with Stimulus Reflex as well. You can simply include the cable_ready call in your *_reflex.rb file and it will cause the reflex change to be broadcast out to every connected client at the same time as the reflex (technically right before, but close enough).

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This is so much easier to implement compared to using a front end framework like React. I wish I knew about these concepts earlier!

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Is there a way to create a channel that only broadcasts to a specific signed in user? For example just send the broadcast to the user who created the card instead of everyone currently connected to the application?

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Sure, this can be done in my different ways. You could include a "data-user-id='#{current_user.id}'" in your template and set the selector option in your cable_ready call to be "[data-user-id='#{current_user.id}']".

This would work, but if your use case is to only update to the current user, Stimulus Reflex does that out of the box.

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Thanks Michael.

It also looks like I can do this by including the user id in the stream name as well and it will only send the update to any connections that user has.

class UserChannel < ApplicationCable::Channel
def subscribed
stream_for "user_channel_#{current_user.id}"
end
end

cable_ready["user:user_channel_#{user_id}"].inner_html(
selector: "#update_div",
html: html
)
cable_ready.broadcast

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Hi! Is there anyone can help me?
I was trying implement the cable_ready by following this tutorial. But unfortunately, the cable_ready didn't work well. It just broadcast the data, but the client didn't receive that data. I also tried cloning the repo from this tutorial to my local machine, it also didn't work. Idk why, I'm still figuring it out.

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facing a similar issue.. its broadcasting the data, but not updating the views. wondering if I'm doing something wrong related to action cable. were you able to fix yours?

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had to change my cable.yml file to the below and its working fine.

development:
  adapter: redis
  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>

test:
  adapter: async

production:
  adapter: redis
  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
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I have an application using ActionCable broadcasting to about 100 TV screens when a new event happens.
This works great on local machine but on server (centOS, NGINX) I see a lot of Broken Pipe messages and many screens don't receive the updates.
Would this be a better solution or have the same problem since it's using the same technology under the hood? Please advice

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Hi Peter, I'd be happy to discuss the probems that you're seeing and make some suggestions about how best to proceed.

CableReady is based ActionCable, which should be able to scale to ~4000 concurrent connections. There are other solutions beyond that stage.

Just jump on the #cableready channel on the StimulusReflex Discord: https://discord.gg/XveN625

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