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ruby-on-railsrubyruby-on-rails-8

Turbo Stream broadcast error in Rails 8.0.1

I have a new Rails 8.0.1 app

In an index.html.erb page I code:

<%= turbo_stream_from "test" %>
<div id="message">
  <p>hello</p>
</div>

In server output everything seams ok:

08:58:49 web.1  | Started GET "/cable" for 127.0.0.1 at 2025-01-14 08:58:49 +0000
08:58:49 web.1  | Started GET "/cable" [WebSocket] for 127.0.0.1 at 2025-01-14 08:58:49 +0000
08:58:49 web.1  | Successfully upgraded to WebSocket (REQUEST_METHOD: GET, HTTP_CONNECTION: Upgrade, HTTP_UPGRADE: websocket)
08:58:49 web.1  | Turbo::StreamsChannel is transmitting the subscription confirmation
08:58:49 web.1  | Turbo::StreamsChannel is streaming from test

Now I open a console and write:

Turbo::StreamsChannel.broadcast_replace_to(
  "test",
  target: "message",
  html: "<p>bye</p>"
)

output:

[ActionCable] Broadcasting to test: "<turbo-stream action=\"replace\" target=\"message\"><template><p>bye</p></template></turbo-stream>"

Nothing happen in the browser. I checked in devtools network the websocket connection "cable":

Request URL: ws://localhost:3000/cable
Request Method: GET
Status Code: 101 Switching Protocols

and in messages, the three first, and after that the pings:

{"type":"welcome"}
{"command":"subscribe","identifier":"{\"channel\":\"Turbo::StreamsChannel\",\"signed_stream_name\":\"InRlc3Qi--b4e0cf48724894bdbc04aecdb38b58f60f628af8d3e16fc2d7c552cfe0e98d5c\"}"}
{"identifier":"{\"channel\":\"Turbo::StreamsChannel\",\"signed_stream_name\":\"InRlc3Qi--b4e0cf48724894bdbc04aecdb38b58f60f628af8d3e16fc2d7c552cfe0e98d5c\"}","type":"confirm_subscription"}

but nothing happen in the server.

Thanks in advance

Solution

  • The default Async adapter does not support broadcasting. To enable broadcasting, I need to configure a persistent adapter like Redis for Action Cable.