sassc-rails | Integrate SassC-Ruby with Rails | Style Language library

So I have a file not found problem. I have an engine that works in development mode in the engines test/dummy app, the engine allows the editing of sass variables and stores them in a theme table, the variables are used by a sass partial such as _banner.scss containing variables used in the main stylesheet such as $banner_color which is then imported into the main stylesheet which in turn is precompiled using an initializer in the engine.rb file and inclusion in the app/config/engine_name_manifest.js.

The files are all available in development with the local dummy app but not in the eventual host app due to the assets being compiled.

I have a rake task that takes the data, updates the relevant partial e.g. _banner.scss with the data from the theme table but of course the partials are not not available in a host app as the engine has already compiled them. I'm looking for a solution that will allow me to edit the raw, uncompiled stylesheets then recompile them. Obviously my Capistrano deploy script will need to reapply the stylesheet changes every deployment but that is just a rake task call. What approach should I take? Should I find a way to copy the css files to the host app in an engine initializer? Should I use a different approach entirely, I have started looking at propshaft but that is a massive step to replace sass rails and I'm not sure how that would help

The engine

I have a Rails 7 project using TailwindCSS deployed to Heroku that is not building tailwind.css during rake asset:precompile and I don't know why. When I try to access the application, it crashes with this error:

I recently upgraded from Rails 6.1.4.6 to 7.0.2.2. With this upgrade I switched from webpacker to import maps with sprockets. My repo didn't include turbolinks or stimulus and I didn't feel like adding them now either. So I re-added UJS and most of my tests pass except the action cable feature tests. It seems I cannot get action cable to connect.

Any help would be appreciated!

Gemfile

I gen this error when I try to deploy:

I'm working on getting a new Rails 7 project deployed to production (trying on both Heroku and Render.com) and am getting the following error during build:

I'm very new to Rails and full-stack development in general. I've just finished Michael Hartl's Ruby on Rails Tutorial 6th edition and am walking through it again to build my first project (i.e. an app that's different from the sample app built in the book, but draws on a lot of the same lessons). Catch is that new project is using Rails 7.

It was going well until I ran into issues around Chapter 7; my app will not render a partial with error messages for bad submissions to the new user form. The code in the partial executes (as verified with debugger, and later with a puts statement to output on console), but the HTML doesn't output (i.e. it cannot be found when inspecting the page in Chrome). There is a CSS issue related to newer version of bootstrap, but I even tried downgrading to the bootstrap version from the book (3.4.1) with no luck. (the offending CSS segment is commented out below)

I've banged my head on this for a few hours. Hoping it's just something dumb I'm missing. If it's a broader issue with Bootstrap vs Importmaps or something I'd also appreciate references on good places to learn these. I am extremely grateful for any ideas!

Edit This definitely isn't an issue with passing local variables into the partial; see code snippet and comment added at the end of this post.

app/views/users/new.html.erb:

I am learning Hotwire-rails, following both the gorails.com and the Hotwire.dev examples. I am running Ruby 3.0.2 and Rails 6.1.4.1. The symptom is at the very start. After rails new xxx, I edit Gemfile to add gem 'hotwire-rails', then bundle install. At this point my app/javascript/packs/application.js is now:

I have a new rails 7 application which is using the importmap-rails gem to manage the javascript frontend libraries.

I am attempting to use the Semantic-UI library, but the dependency for jQuery is not being recognized by the Semantic-UI javascript.

I was unable to pin the Semantic-UI library via importmap, so I added this library to the importmap.rb manually. Here is a link the cdn for semantic.min.js I am using.

The following error message appears in the console on Chrome Web Tools and the collapsible accordions are not functioning that I have on the page to validate the javascript.

So after executing the following commands:

1. rails new sample_app
2. cd sample_app
3. rails db:create
4. rails generate scaffold User name:string email:string
5. rails db:migrate

and finaly when i run rails server i get: