Rails Hotwire + Admin Namespace - ruby-on-rails

Question

I have an app running rails 6.1.3.2. I'm starting to migrate to use hotwire instead of ujs. My app uses an admin namespace to allow a user to make edits, create items via this. Example route below -
resources :event_attachments
namespace :admin do
resources :event_attachments
end
When making an update via the admin view to an event_attachment, the turbo_stream is not processing the partial in the admin view, instead it's looking in EventAttachmentsController. I'm not sure why it's doing this - any suggestions would be appreciated.
Admin:EventAttachmentsController -
def update
if #event_attachment.update(event_attachment_params)
respond_to do |format|
format.turbo_stream do
render turbo_stream: [
turbo_stream.update("flash", partial: "shared/flash", locals: { notice: "Event image updated" }),
turbo_stream.replace(:event_attachments, partial: 'admin/pages/event_attachment', locals: { event_attachment: #event_attachment })
]
end
format.html do
redirect_to edit_admin_event_attachment_path(#event_attachment), notice: 'Event image updated'
end
end
else
render :edit, status: :unprocessable_entity
end
end
Here's a sample of my form in admin/event_attachments -
<%= form_for([:admin, event_attachment], :id => dom_id(event_attachment)) do |f| %>
<%= f.text_field :title, :placeholder => "Event image name *" %>
<% end %>
Rails Server Log (as a test, I created a partial in the main event_attachments view) -
Started PATCH "/event_attachments/25" for ::1 at 2022-01-03 22:18:53 -0500
Processing by EventAttachmentsController#update as TURBO_STREAM
Parameters: {"utf8"=>"✓", "authenticity_token"=>"[FILTERED]", "event_attachment"=>{"title"=>"Test Name", "summary"=>"caption"}, "commit"=>"Save Changes", "id"=>"25"}
EventAttachment Load (1.1ms) SELECT `event_attachments`.* FROM `event_attachments` WHERE `event_attachments`.`id` = 25 LIMIT 1
↳ app/controllers/event_attachments_controller.rb:51:in `set_event_attachment'
Rendered event_attachments/_event_attachment.html.erb (Duration: 0.1ms | Allocations: 22)
[ActionCable] Broadcasting to event_attachments: "<turbo-stream action=\"update\" target=\"event_attachment_25\"><template><li id=\"event_attachment_25\">\n hello\n</li>\n</template></turbo-stream>"
Redirected to http://localhost:3000/event_attachments/25
Completed 302 Found in 4ms (ActiveRecord: 1.1ms | Allocations: 1640)

Answer 1

It looks like the problem here is in the url that your form is sending the request to. If you look in the logs you will see it says processing by EventAttachmentsController#update this is because in your form the URL is wrong. My thoughts is you should change from using form_for and the [] to use form_with
<%= form_with(url: admin_event_attachments_path, :id => dom_id(event_attachment)) do |f| %>
<%= f.text_field :title, :placeholder => "Event image name *" %>
<% end %>