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Rails update from 5.2.4 to 5.2.5 breaks assets

Before a deployment, I ran bundle install and bundle update. Then my Rails version switched from 5.2.4 to 5.2.5, and several gems were upgraded too. Everything is still working perfectly in development environment.
But problems appeared after deploying to production environment. I have the following issue, which I think is related to assets. Any page I request, the following message ends up in the log file:
I, [2021-04-22T22:48:43.887632 #7620] INFO -- : Rendered users/index.html.erb within layouts/application (11.6ms)
I, [2021-04-22T22:48:44.149881 #7620] INFO -- : Completed 500 Internal Server Error in 294ms (ActiveRecord: 1.9ms)
F, [2021-04-22T22:48:44.150616 #7620] FATAL -- :
F, [2021-04-22T22:48:44.150738 #7620] FATAL -- : ActionView::Template::Error (application.css):
F, [2021-04-22T22:48:44.150992 #7620] FATAL -- :
9: <title><%= full_title(yield(:title)).html_safe %></title>
10:
11: <link href="/assets/oblique-4.1.1/styles/images/favicon.png" rel="shortcut icon">
12: <%= stylesheet_link_tag "application", media: "all", "data-turbolinks-track" => true %>
13: <%= javascript_include_tag "application", "data-turbolinks-track" => true %>
14: <%= csrf_meta_tags %>
15: <%= render "layouts/shim" %>
F, [2021-04-22T22:48:44.151084 #7620] FATAL -- :
F, [2021-04-22T22:48:44.151184 #7620] FATAL -- : app/views/layouts/application.html.erb:12:in `_app_views_layouts_application_html_erb__255798539_93007000'
app/controllers/users_controller.rb:22:in `block (2 levels) in index'
app/controllers/users_controller.rb:21:in `index'
This happens only in the production environment, of which configurationis given by the untouched production.rb file:
DataQualityManager::Application.configure do
# Settings specified here will take precedence over those in config/application.rb.
# Code is not reloaded between requests.
config.cache_classes = true
# Eager load code on boot. This eager loads most of Rails and
# your application in memory, allowing both thread web servers
# and those relying on copy on write to perform better.
# Rake tasks automatically ignore this option for performance.
config.eager_load = true
# Full error reports are disabled and caching is turned on.
config.consider_all_requests_local = false
config.action_controller.perform_caching = true
# Enable Rack::Cache to put a simple HTTP cache in front of your application
# Add `rack-cache` to your Gemfile before enabling this.
# For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
# config.action_dispatch.rack_cache = true
# Debug mode disables concatenation and preprocessing of assets.
# This option may cause significant delays in view rendering with a large
# number of complex assets.
# config.assets.debug = true
# Disable Rails's static asset server (Apache or nginx will already do this).
config.serve_static_assets = true
# Compress JavaScripts and CSS.
config.assets.js_compressor = Uglifier.new(harmony: true)
# config.assets.css_compressor = :sass --> automatically used due to sass-rails gem
# Do not fallback to assets pipeline if a precompiled asset is missed.
config.assets.compile = true
# Generate digests for assets URLs.
config.assets.digest = true
# Version of your assets, change this if you want to expire all your assets.
config.assets.version = '1.0'
# Specifies the header that your server uses for sending files.
# config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
# config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
# Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
config.force_ssl = false
# Set to :debug to see everything in the log.
config.log_level = :info
# Prepend all log lines with the following tags.
# config.log_tags = [ :subdomain, :uuid ]
# Use a different logger for distributed setups.
# config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
# Use a different cache store in production.
# config.cache_store = :mem_cache_store
# Enable serving of images, stylesheets, and JavaScripts from an asset server.
# config.action_controller.asset_host = "http://assets.example.com"
# Precompile additional assets.
# application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
config.assets.precompile += %w( search.js )
# Ignore bad email addresses and do not raise email delivery errors.
# Set this to true and configure the email server for immediate delivery to raise delivery errors.
# config.action_mailer.raise_delivery_errors = false
# Enable locale fallbacks for I18n (makes lookups for any locale fall back to
# the I18n.default_locale when a translation can not be found).
# config.i18n.fallbacks = true
# Send deprecation notices to registered listeners.
config.active_support.deprecation = :notify
# Disable automatic flushing of the log to improve performance.
# config.autoflush_log = false
# Use default logging formatter so that PID and timestamp are not suppressed.
config.log_formatter = ::Logger::Formatter.new
# Store uploaded files locally.
config.active_storage.service = :local
# Define connection to email services
config.action_mailer.default_url_options = { :host => 'l021000110029b.adr.admin.ch/' }
config.action_mailer.delivery_method = :smtp
config.action_mailer.perform_deliveries = true
config.action_mailer.raise_delivery_errors = false
config.action_mailer.default :charset => "utf-8"
end
The Gemfile contains:
source 'https://rubygems.org'
gem 'rails', '~> 5.2'
gem 'bootstrap-sass'
gem 'sassc-rails'
gem 'coffee-rails', '~> 5.0'
gem 'uglifier', '~> 4.0'
gem 'bcrypt', '~> 3.1'
gem 'jquery-rails'
gem 'turbolinks', '~> 5.2'
gem 'jbuilder', '~> 2.6'
gem 'will_paginate', '~> 3.1'
gem 'd3-rails'
gem 'js_cookie_rails'
gem 'httparty', '~> 0.14'
gem 'nested_form_fields'
gem 'pg'
gem 'deep_cloneable', '~> 3.0'
#gem 'acts-as-taggable-on', '~> 6.0'
gem 'tzinfo-data'
gem 'audited', '~> 4.9'
gem 'awesome_print' # Layout enhancement for Audited
# Generate SQL scripts via renderer
gem 'sql_query'
# Workflow support
gem 'workflow-activerecord', '>= 4.1', '< 6.0'
# Full-text search with Postgres
gem 'pg_search'
# Use Puma as the app server
gem 'puma', '~> 5.0'
# XLSX format support
gem 'write_xlsx'
gem 'write_xlsx_rails', git: 'https://github.com/fchampreux/write_xlsx_rails.git', branch: 'master'
gem 'roo'
# Authentication and Authorisations
gem 'devise'
gem 'devise-security'
gem 'email_address' # for email validation
gem 'cancancan', '~> 3.0'
# MarkDown parser
gem 'redcarpet', '~> 3.5'
# eMail notification support
gem 'mailgun-ruby', '~>1.1'
# gem for dev and test only
group :development, :test, :validation do
gem 'annotate', '~> 3.0'
gem 'byebug'
gem 'faker'
gem 'shoulda-matchers'
gem 'rails-controller-testing'
gem 'rspec-rails', '~> 4.0'
gem 'factory_bot_rails', '~> 6.0'
gem 'capybara', '~> 3.15'
gem 'database_cleaner-active_record'
gem 'selenium-webdriver', '~>3.140'
end
Can you help me understand what causes the failure after the upgrade?
Thanks a lot!

How do I make a JavaScript function available globally in Rails 6 with Webpack?

As a beginner on Rails 6. Whenever, i click on the Roar Link then it gives me the following error. The following files are attached below. I just want to add custom file(demo.js) into my code so that i can test the behavior of JavaScript in my following code. Java Script behavior on Rails 5 is different from the Rails 6.
Kindly give me the better solution so that i can solve my problem. I tried all of answers on stack overflow.
Application.html.erb (views/layouts/application.html.erb)
<!DOCTYPE html>
<html>
<head>
<title>SimpleCms</title>
<%= csrf_meta_tags %>
<%= csp_meta_tag %>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= javascript_pack_tag 'application', 'data-turbolinks-track': 'reload' %>
</head>
<body>
<%= yield %>
</body>
</html>
demo.js (app/javascript/packs/demo.js)
function jsRoar(name) {
alert('I am ' + name + '. Hear me roar!');
}
application.js (app/javascript/packs/application.js)
require("#rails/ujs").start()
require("turbolinks").start()
require("#rails/activestorage").start()
require("channels")
require("packs/demo")
index.html.erb (views/demo/index.html.erb)
<h1>This is the index Page</h1>
<br/>
<%= link_to('All Subjects',subjects_path) %>
<%= link_to('Roar', '#', :onclick => "jsRoar('JavaScript'); return true;") %>
demo_controller.rb
class DemoController < ApplicationController
layout 'application'
def index
render ('index')
end
def hello
render ('hello')
end
end
GEM File
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '2.6.6'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.3', '>= 6.0.3.2'
# Use mysql as the database for Active Record
gem 'mysql2', '>= 0.4.4'
# Use Puma as the app server
gem 'puma', '~> 4.1'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more:
https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Active Storage variant
# gem 'image_processing', '~> 1.2'
# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
# Access an interactive console on exception pages or by calling 'console' anywhere in the code.
gem 'web-console', '>= 3.3.0'
end
group :test do
# Adds support for Capybara system testing and selenium driver
gem 'capybara', '>= 2.15'
gem 'selenium-webdriver'
# Easy installation and use of web drivers to run system tests with browsers
gem 'webdrivers'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

You're thinking of the old way of doing it. I've explained it here:
https://stackoverflow.com/a/56549843/1238868
Here's a more modern way of doing what you're trying.
<%= link_to('Roar', '#', data: {roar: 'JavaScript'}) %>
In demo.js:
document.addEventListener("turbolinks:load", function() {
document.querySelectorAll('[data-roar]').forEach(function(roaring_link) {
roaring_link.addEventListener('click', function(event) {
let name = roaring_link.dataset['roar']
alert('I am ' + name + '. Hear me roar!');
event.preventDefault();
event.stopPropagation();
return false;
});
});
});
Note that the code in demo.js is self-contained and simply looks at the document and attaches the desired functionality to the links. You specify what links those are by adding a data attribute with the data that you wish to pass to your javascript function.
This might seem complicated but after you get the hang of it you'll find your javascript is really clean and easy to maintain.

Rails 6 App links not working until refresh

I tried to follow this tutorial by GoRails to add EasyAutoComplete to my Rails app:
https://www.youtube.com/watch?v=ibxlNN73UTY
Although the search bar functions as the GoRails guy demonstrates, I keep seeing this page whenever I click on any link:
If I refresh this page, then it takes me to the user sign in page that I originally clicked on. I don't notice anything out of the ordinary in my Rails server console throughout this process.
I added the css files and the js files for EasyAutoComplete to my Assets pipeline, because I was having a hard time using webpacker correctly.
For jquery, I followed this article to install it: https://www.botreetechnologies.com/blog/introducing-jquery-in-rails-6-using-webpacker
and I used this video as reference as well:
https://www.youtube.com/watch?v=bn9arlhfaXc
My Gemfile looks like:
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '2.6.2'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.0.rc2'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Active Storage variant
# gem 'image_processing', '~> 1.2'
# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
# Access an interactive console on exception pages or by calling 'console' anywhere in the code.
gem 'web-console', '>= 3.3.0'
gem 'listen', '>= 3.0.5', '< 3.2'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
gem 'spring-watcher-listen', '~> 2.0.0'
end
group :test do
# Adds support for Capybara system testing and selenium driver
gem 'capybara', '>= 2.15'
gem 'selenium-webdriver'
# Easy installation and use of web drivers to run system tests with browsers
gem 'webdrivers'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
gem 'redis'
gem 'braintree'
gem 'bcrypt'
gem 'foreman'
gem 'rails-controller-testing'
gem 'faker'
gem 'pagy'
gem 'figaro'
gem 'gon'
gem 'modernizr-rails'
gem 'stripe-rails'
# thirdparty authentications
gem 'omniauth-google-oauth2'
gem 'omniauth-facebook'
gem 'omniauth-twitter'
gem 'activerecord-session_store'
# for front end
gem 'react-rails'
gem 'bootstrap'
gem 'sprockets-rails'
gem 'jquery-rails'
# catches test emails
gem 'mailcatcher'
gem 'devise'
# admin panel
gem 'rails_admin'
# active storage variant
gem 'mini_magick', '~> 4.8'
gem 'rack', '~> 2.0.8'
gem 'ransack'
My search.js looks like:
document.addEventListener('turbolinks:load', function () {
$input = $("[data-behavior='autocomplete']")
var options = {
getValue: 'name',
url: function (phrase) {
return '/search.json?q=' + phrase
},
categories: [
{
listLocation: 'products',
header: '<strong>Products</strong>'
}
],
list: {
onChooseEvent: function () {
var url = $input.getSelectedItemData().url
$input.val('')
Turbolinks.visit(url)
}
}
}
$input.easyAutocomplete(options)
})
My application.js in app/javascript/packs looks like:
require('#rails/ujs').start()
require('turbolinks').start()
require('#rails/activestorage').start()
require('channels')
require('jquery')
//= require jquery
//= require popper
//= require bootstrap-sprockets
//= require jquery.easy-autocomplete
Any help would be greatly appreciated!
Edit:
When I remove the "require('turbolinks').start()" in my application.js the problem goes away but my search bar stops working.
When I click on a link with my developer console up I see this:
I also created a sample app that also has the same problem in this repository:
https://github.com/zx1301/sampleAppTurbolinksError
I'm using ruby 2.6.2 and rails 6.0.2. In its current state I commented out the lines linking the css and js files to easyAutocomplete and the problem persists unless I disable turbolinks by commenting out turbolinks in application.js.

Going by where the links in the repo you linked navigate to (nowhere #), this is a known issue with turbolinks.
You can add data-turbolinks="false" to the link tags to prevent this type of behavior.

javascript / ajax runs on localhost - not on heroku

I use javascript to update a partial on my website.
I am telling the controller to respond to js format:
def statistic
#game = Game.find(params[:game_id])
#tickers = #game.tickers
respond_to do |format|
format.html
format.js
format.json { render json: #game }
end
end
and I have a statistic.js.erb file in my view folder like this:
$("#main").html("<%= escape_javascript render(:file => 'home/statistic.html.erb', :handlers => [:erb]) %>");
It works on my localhost. That means the statistic page opens in the main-frame. But when I deploy on heroku it opens a new page.
Here is the log of my localhost:
... Processing by HomeController#statistic as JS ...
This ist the heroku log:
... Processing by HomeController#statistic as HTML ...
I guess the problem is that javascript isn't installed or implemented on my heroku account? This is my gemfile. Perhaps that helps:
source 'https://rubygems.org'
gem 'rails', '3.2.1'
gem 'simple_form'
group :development do
gem 'sqlite3', '1.3.5'
end
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
group :production do
gem 'pg', '0.12.2'
end
Do you know what to do? Thanks for help.

I found the answer:
bundle exec rake assets:precompile
before pushing to heroku helped me

Why is the show.js.coffee file never reached?

Also posted here: https://gist.github.com/1100596. (This problem does not pertain to the CoffeeBeans gem alone, I don't think.)
# Controller
class RestaurantsController < ApplicationController
def show
#restaurant = Restaurant.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.js # show.js.coffee
end
end
end
# restaurants/show.html.erb
<%= link_to "Breakfast", #restaurant, :remote => true, :id => "breakfast_filter" %>
# restaurants/show.js.coffee
alert("here we are");
Why is the show.js.coffee file never reached? In fact, even if it were show.js.erb, it wouldn't be reached...
The whole point is so I can reload part of the show.html.erb page with AJAX.
Background: I'm using Rails 3.1rc4, and my Gemfile is as follows:
source 'http://rubygems.org'
# Using ruby 1.9.2p180
gem 'rails', '3.1.0.rc4' # :git => 'git://github.com/rails/rails.git', :branch => '3-1-stable'
gem 'sprockets', '2.0.0.beta.10' # :git => 'git://github.com/sstephenson/sprockets.git'
#gem 'mysql2' # No longer MySQL
gem 'pg', '0.11.0' # For PostgreSQL db
gem 'authlogic', '3.0.3' # smart user authentication
gem 'cancan', '1.6.5' # manage abilities across types of users
gem 'dynamic_form', '1.1.4' # easy error messages for forms
# Asset template engines
gem 'sass-rails', '~> 3.1.0.rc'
gem 'coffee-script', '~> 2.2.0'
gem 'uglifier', '~> 1.0.0' # compresses JS code for production
# We use jQuery, the default
gem 'jquery-rails', '>= 1.0.12'
# Temporary - 3.1 SHOULD require >=0.9.2, but there are still bugs
gem 'rake', '0.8.7'
# This makes AJAX and CoffeeScript play nicely together
gem 'coffeebeans'
group :production do
gem 'therubyracer', '~> 0.9.3.beta1'
end
gem 'factory_girl_rails' # seeds.rb needs this
#gem 'forgery'
group :test, :development do
# helpers
gem 'database_cleaner'
# core testing frameworks
gem 'rspec-rails', '>= 2.6.1'
gem 'cucumber-rails', '>= 1.0.0'
gem 'capybara', '>= 1.0.0'
# Pretty printed test output
gem 'turn', :require => false
end
# Use unicorn as the web server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'
Help appreciated.