Dropdown menu does not work

I am using Ruby 1.9.3 and Rails 3.2.16.

My bootstrape dropdown menu not working. I have no idea why?

Gemfile contain:

ruby "1.9.3" gem 'rails', '3.2.16' gem 'bootstrap-sass', '2.1' gem "watu_table_builder", :require => "table_builder", :git => "git://github.com/watu/table_builder.git" gem 'bcrypt-ruby', '3.0.1'

group :development, :test do   gem 'sqlite3', '1.3.5' end

group :assets do    gem 'sass-rails', '3.2.5'    gem 'coffee-rails', '3.2.2'    gem 'uglifier', '1.2.3'    gem 'jquery-ui-rails' end

gem 'jquery-rails' gem 'jquery_datepicker', '~> 0.4'

group :production do   gem 'pg', '0.12.2' end

Code of application.js:

//= require jquery-ui //= require jquery_ujs //= require bootstrap-dropdown //= require bootstrap //= require jquery //= require_tree .

I have taken reference of [this]ruby on rails - twitter bootstrap drop down suddenly not working - Stack Overflow link. But this problem does not solve.

Could you help me on this?

Kind regards.

Does the javascript console ( F12 ) show any errors ?

Sampath Weerasinghe wrote in post #1153678:

Does the javascript console ( F12 ) show any errors ?

When I used code in application.js as per javascript load order like as

follow:

//= require jquery //= require jquery_ujs //= require jquery-ui //= require bootstrap //= require_tree .

I got error in javascript console like:

" Uncaught Error: jquery-ujs has already been loaded! ".

I have solved this issue.

I add following code in users.js.coffee:

jQuery -> $('.dropdown-toggle').dropdown()

Hello there, I have gone through your query which is very commonly found nowadays so I have created a path for you which I hope might get worked in your case.

As Ruby 1.9.3 and Rails 3.2.16 are quite old now so you should consider upgrading to more recent versions to benefit from security updates and improved compatibility. If this doesn’t help too you can take reference from GitHub - roberrttt/ruby-on-rails

Thanks Zach Tyson