[LRUG] Turbo - form render on error, redirect on success

[Andrew Stewart]

Thanks for the reply, Simon.  That issue was one of the many I had read, along with countless posts on the Hotwire forum.

The Turbo handbook's Drive page covers Form Submissions[1] and Redirecting After a Form Submission[2].  It says it'll do the right thing if you repond to an invalid form submission with 422 and a valid one with 303.  But that's on the Drive page, not the Frames page.  Furthermore the Drive page goes on to talk about Streaming After a Form Submission[3], not frames.

Perhaps in this case it's better to use a stream than a frame.

I went with a frame initially so I could easily lazy-load it when the modal was opened.  Later I decided instead to populate the modal with the form at page load – so I'm not getting any real benefit from the frame.

So now I have ditched the frame and changed my controller action to:

    def create
      thing = Thing.new thing_params
      respond_to do |format|
        if thing.save
          format.html { redirect_to things_path, status: :see_other }
        else
          format.turbo_stream {
            render turbo_stream: turbo_stream.replace(thing, partial: 'new', locals: {thing: thing})
          }
        end
      end
    end

And that works the way I want.  It's still a bit clunky but it's ok for now.  Hopefully one of the various solutions proposed on GitHub will be incorporated into Turbo before too long.

Yours,
Andy

[1] https://turbo.hotwired.dev/handbook/drive#form-submissions <https://turbo.hotwired.dev/handbook/drive#form-submissions>
[2] https://turbo.hotwired.dev/handbook/drive#redirecting-after-a-form-submission <https://turbo.hotwired.dev/handbook/drive#redirecting-after-a-form-submission>
[3] https://turbo.hotwired.dev/handbook/drive#streaming-after-a-form-submission

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