loofah | Ruby library for HTML/XML transformation and sanitization

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:

If one uses Rails::Html::PermitScrubber and doesn't specify a value for tags or attributes it defaults to using reasonable defaults from Loofah::HTML5::Scrub. However, as soon as you set tags or attributes it chooses a completely different code path that ignores those defaults.

I want to start with the default functionality provided by Rails::Html::PermitScrubber (i.e. when tags/attributes aren't specified) and just make a few small changes but looking at the class implementation it seems like I would need to basically copy and reimplement half the PermitScrubber methods just to access that default functionality. And the defaults provided by Loofah::HTML5::Scrub don't seem to be part of any existing Loofah::Scrubber class.

So how do I make minor changes to the default operation of Rails::Html::PermitScrubber without reimplementing half the class? Surely this is a very common use case!

I'm seeing the following error it only is appearing in cron jobs using the whenever gem. The application is working correctly otherwise. The scheduled job doesn't run. But I can run it manually and it does work.

I'm trying to scrub out mailto links while allowing others using Rails::HTML Scrubbers.

See: https://github.com/rails/rails-html-sanitizer

I have a Loofah fragment like this:

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:

Looked through past posts on SO but couldn't find the solution.

Environment:

1. Mac OS Big Sur
2. Rails 6.1.3.2
3. ruby 3.0.1p64

Github repo https://github.com/tenzan/ruby-bootcamp

Added Bootsrtap 5 according to https://blog.corsego.com/rails-6-install-bootstrap-with-webpacker-tldr

To push to heroku I ran git push heroku main

Output:

Im running ruby version 2.6.1 with docker. Rake gem is version 13.0.1.
Whenever I tried docker-compose up, it always fails and throws this error everytime:
This error did not exist before.

I'm trying to build a Rails application on Mac OS Big Sur with the following versions ...

I'm helping a friend with a project, but after helping him with the logic instead of merging my branch, for some reason he copied the code and added it himself. So my branch remained "behind". He kept working and now he asked me to help him with something else, but I had a bunch of conflicts to resolve before working on the new logic, I tried to resolve the conflicts manually but something must have slipped my check, because now I have a bunch of conflicts in the Gemfile.lock that I don't know how to fix. Can you guys give it a check? Thank you so much!