title: Rails server tells me--- couldn't find file 'jquery-ui/datepicker' with type 'application/javascript'
body: <pre><code>couldn't find file 'jquery-ui/datepicker' with type 'application/javascript'
  Checked in these paths: 
    /Users/jsbae/Desktop/unisports/app/assets/config
    /Users/jsbae/Desktop/unisports/app/assets/images
    /Users/jsbae/Desktop/unisports/app/assets/javascripts
    /Users/jsbae/Desktop/unisports/app/assets/stylesheets
    /Users/jsbae/Desktop/unisports/vendor/assets/javascripts
    /Users/jsbae/Desktop/unisports/vendor/assets/stylesheets
  </code></pre>
  
  <p>This is what is happening when I try to run the rails server. I have checked my gem list and can see I have:</p>
  
  <pre><code>jquery-rails (4.2.2, 4.2.1)
  jquery-turbolinks (2.1.0)
  jquery-ui-rails (6.0.1, 5.0.5)
  jqueryui_rails (0.0.4)
  </code></pre>
  
  <p>I have seen a lot of posts on problems with the versions, so I also tried to downgrade jquery-rails and jquery-ui-rails, but when running the commands such as: </p>
  
  <pre><code>gem install 'jquery-rails','~&gt;2.3.0' OR gem install 'jquery-ui-rails', '~&gt; 4.2.1'
  </code></pre>
  
  <p>But they constantly send me errors like:</p>
  
  <pre><code>ERROR:  Could not find a valid gem 'jquery-rails-2.3.0' (&gt;= 0) in any repository
  ERROR:  Possible alternatives: jquery_rails3, jquery-rails, jquery-rails-cdn, jquery-rails_vho, jquery-rails-aristo
  </code></pre>
  
  <p>I have also tried editing the application.js and application.css files with<br>
  <code>*= require jquery-ui' &amp; '//= require jquery-ui</code></p>