👀 Views: 419 💬 Answers: 1 📅 Created: 2025-07-23

ruby rails activestorage image-processing

I'm converting an old project and I've been banging my head against this for hours. I'm relatively new to this, so bear with me... I'm working with an scenario while trying to process images uploaded through ActiveStorage in a Rails 6.1 application. I want to resize the images and apply a watermark after they are uploaded, but I'm running into unexpected behavior where the processed images do not seem to save correctly. I expected the images to be resized and watermarked, but they are being saved in their original size without any modifications. I implemented the following code in my `after_save` callback: ```ruby class Image < ApplicationRecord has_one_attached :photo after_save :resize_and_watermark private def resize_and_watermark return unless photo.attached? photo.analyze # Ensure analysis is done resize_image(photo) add_watermark(photo) end def resize_image(image) image.variant(resize: "300x300").processed end def add_watermark(image) # Assuming watermark is a method that handles the watermarking logic watermark(image) end end ``` I also noticed that the resized variant does not get saved back to the database. When I try to access the processed image using `photo.variant(resize: '300x300').url`, it returns the original image URL instead. I’ve confirmed that the `photo.attached?` condition is true, and I can see the original image being uploaded correctly. I’ve tried debugging by looking at the server logs but haven’t found any clues as to why the processing isn't taking effect. Has anyone else experienced this scenario with ActiveStorage? Any insights into what might be going wrong or how I could properly save the processed image? This issue appeared after updating to Ruby LTS. I'm working on a CLI tool that needs to handle this. How would you solve this?