I can't Integrate Bootstrap in my Ruby on Rails App

Question

I have tried every tutorial and every guide but I am not able to integrate bootstrap in my rails app I have tried bootstrap-sass gem, bootstrap CDN, bootstrap gem

Ruby on Rails version 5.2.0 Ruby version 2.2.6

EXACTLY FOLLOWED THESE TUTORIALS AND HAVE ACHIEVED 0 RESULTS:

for bootstrap sass https://github.com/twbs/bootstrap-sass

for bootstrap https://github.com/twbs/bootstrap

tried using bootstrap CDN https://www.bootstrapcdn.com/

I have been stuck on this for weeks, tried solving it on my own, followed many blog posts and StackOverflow answers and tried everything. Is it a problem with rails 5.2 version? or my operating system windows 10 is there a gem missing in my gem file?

EDIT: I can run bundle install successfully, adding CDN in my head tag in application.html.erb does not solve my problem The problem I am facing is that I cant use bootstrap no matter what method I try

GEM FILE :

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.2.6'


gem 'rails', '~> 5.2.0'


gem 'sqlite3'


gem 'puma', '~> 3.11'


gem 'coffee-script-source', '1.8.0'


gem 'bootstrap-sass', '~> 3.3.7'


gem 'sass-rails', '~> 5.0'


gem 'jquery-rails'


gem 'uglifier', '>= 1.3.0'


gem 'duktape'


gem 'coffee-rails', '~> 4.2'


gem 'turbolinks', '~> 5'


gem 'jbuilder', '~> 2.5'


gem 'bootsnap', '>= 1.1.0', require: false

Answer 1

Maybe try this one:

1) Gemfile

# Add these gems. Rails is not including jQuery by default.
# You need to include it to use all bootstrap options.
gem 'bootstrap'
gem 'jquery-rails'

2) app/assets/javascripts/application.js

jquery3, popper, and bootstrap are the ones for bootstrap

//= require jquery3
//= require popper
//= require bootstrap

//= require rails-ujs
//= require turbolinks
//= require_tree .

3) app/assets/stylesheets/application.scss

@import 'bootstrap'; // assuming you changed to SCSS from CSS

4) Run bundle and restart your server

This is a working repo with Rails 5.2 and Bootstrap 4 https://github.com/HoracioChavez/bootstrap-sample
Tested on macOS