bootstrapが正しく表示されません

Question

bootstrap4をcloud9に導入したのですが、
ちゃんと読み込めていないのか、表示が正常ではありません。
例えば、以下画像のリンク箇所（Edit）が、添付画像のような表示になっています。
原因に心当たりがある方は教えていただけませんでしょうか。

↓マウスホバー前↓

↓マウスホバー時↓

各種設定ファイルは以下のようになっています。

【application.scss】
/*
 * This is a manifest file that'll be compiled into application.css, which will include all the files
 * listed below.
 *
 * Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
 * or any plugin's vendor/assets/stylesheets directory can be referenced here using a relative path.
 *
 * You're free to add application-wide styles to this file and they'll appear at the bottom of the
 * compiled file so the styles you add here take precedence over styles defined in any other CSS/SCSS
 * files in this directory. Styles in this file should be added after the last require_* statement.
 * It is generally better to create a new file per style scope.
 *
 *= require_tree .
 *= require_self
 */
// Custom bootstrap variables must be set or imported *before* bootstrap.
@import "bootstrap";

【application.js】
// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file. JavaScript code in this file should be added after the last require_* statement.
//
// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require jquery_ujs
//= require bootstrap
//= require turbolinks
//= require_tree .

【gemfile】
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# 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', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
gem 'bootstrap', '~> 4.1.1'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platform: :mri
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console'
  gem 'listen', '~> 3.0.5'
  # 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

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

お手数ですが、どうぞよろしくお願いいたします。

Comments

[m.ts10806]

SCSSをそのまま表示するhtmlに読み込ませているのでしょうか

[awa]

application.scssにbootstrapを記載することで、
全てのファイルにbootstrapを読み込ませようとしている認識です。
bootstrap以外のscssファイルも、application.scssに記述しようかと思っています。
すみません、これで回答になっていますでしょうか。

Answer 1

単にbootstrap gem をbundle installしただけでは使えないと思います。sprockets-railsのバージョンが2.3.2以上であることを
$bundle show |fgrep sprockets-rails などで確認してから
SCSSファイルのrequire系の記述を削除、application.jsに
//= require jquery3
//= require popper
//= require bootstrap-sprockets
を追加で動くかどうか確かめてみてください。

Bootstrap Ruby Gem のGithub ここを参考にしてみてください。

Comments

[awa]

ありがとうございます！
解決できました！