activestorage

For image uploads, I like immediate previews. With Active Storage, you can render the preview server-side once the blob is attached, and use Turbo Streams to update the preview area. The form submits to an endpoint that attaches the blob and returns a

Direct uploads are great because they keep file traffic away from your Rails dynos, but the default UX is opaque. I attach a Stimulus controller that listens for Active Storage’s direct-upload:* events and updates a progress bar. This keeps the markup

Active Storage makes uploads easy; production makes them dangerous. Validate content type and size at the model layer, and keep the error messages user-friendly. This prevents large or unexpected uploads from blowing up costs and processing queues.