Javascript Rails看不见。工具提示方法，即使包含jquery

我正在做一个新的rails项目，并尝试集成一个主题。但是，主题在其.js文件中使用了.tooltip，Rails给了我以下错误：

未捕获类型错误：$..工具提示不是函数

这是我的app/assets/javascripts/application.js文件：

这看起来和我之前的rails应用程序非常相似

以下是文件：

---

任何帮助都将不胜感激。

您没有在项目中加载jquery ui。 在inspina.js之前加载jquery ui

//= require jquery
//= require jquery_ujs
//= require jquery-ui 
//= require dataTables/jquery.dataTables
//= require activestorage
//= require theme/inspinia.js
//= require theme/metisMenu.js

---

谢谢我最终包括引导链轮，这解决了这个问题。我没试过你的解决办法，但我投了赞成票。再次感谢！

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

ruby '2.5.1'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.2.2'
gem 'bootstrap-sass', '~> 3.3.7'
gem 'font-awesome-rails'
# Use sqlite3 as the database for Active Record
gem 'sqlite3', '~> 1.3.6'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'mini_racer', platforms: :ruby

# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# 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', '~> 4.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use ActiveStorage variant
# gem 'mini_magick', '~> 4.8'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.1.0', 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 chromedriver to run system tests with Chrome
  gem 'chromedriver-helper'
end

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

# Jquery
gem 'jquery-rails'
gem 'jquery-ui-rails'

# Used for server-side processing of datatables.
gem 'jquery-datatables-rails'
gem 'ajax-datatables-rails'

$('.tooltip-demo').tooltip({
    selector: "[data-toggle=tooltip]",
    container: "body"
});

//= require jquery
//= require jquery_ujs
//= require jquery-ui 
//= require dataTables/jquery.dataTables
//= require activestorage
//= require theme/inspinia.js
//= require theme/metisMenu.js