[Rails5] Fix ActionCable '/cable' mountpoint conflictblackst0ne-rails5-found-new-routes-that-could-cause-conflicts-with-existing-namespaced-routes

Since Rails 5.0 the new framework has been added. It's called ActionCable.
It brings WebSockets support to rails applications.
By default the mountpoint of WebSocket requests is `/cable` [1].

GitLab allows using top level names as namespaces or usernames.
For example, `gitlab.com/cable` at this moment leads to a user with the
nickname `cable`.

This commit changes ActionCable's mountpoint to a reserved top level
word `-`.
This is just a stub and should not be be used in real work.

Please set correct mountpoints for each environments when configuring
ActionCable for real using.

[1]: https://github.com/rails/rails/blob/5-0-stable/actioncable/lib/action_cable.rb#L38

1 files changed, 5 insertions, 0 deletions

diff --git a/changelogs/unreleased/blackst0ne-rails5-found-new-routes-that-could-cause-conflicts-with-existing-namespaced-routes.yml b/changelogs/unreleased/blackst0ne-rails5-found-new-routes-that-could-cause-conflicts-with-existing-namespaced-routes.yml
new file mode 100644
index 00000000000..c8d916af824
--- /dev/null
+++ b/changelogs/unreleased/blackst0ne-rails5-found-new-routes-that-could-cause-conflicts-with-existing-namespaced-routes.yml
@@ -0,0 +1,5 @@
+---
+title: "[Rails5] Fix ActionCable '/cable' mountpoint conflict"
+merge_request: 20015
+author: "@blackst0ne"
+type: fixed