add new dropdown for lang

Author: Theresa

app/models/description.rb

@@ -1,5 +1,6 @@
 class Description < ActiveRecord::Base
   belongs_to :exercise
 
+  LANGUAGES= ['en', 'de','fr', 'es', 'ja', 'cn']
 
 end

app/models/exercise.rb

@@ -62,7 +62,7 @@ def add_descriptions(description_array)
         description = Description.find(id)
         destroy ? description.destroy : description.update(text: array[:text], language: array[:language])
       else
-        descriptions << Description.create(text: array[:text], language: language) unless destroy
+        descriptions << Description.create(text: array[:text], language: array[:language]) unless destroy
       end
     end
   end

app/views/exercises/_form.html.erb

@@ -30,7 +30,10 @@
         <div class="controls" style="margin-top: 10px; margin-bottom: 10px">
           <%= description.text_area :text, class:'form-control' %>
           <%= description.remove_nested_fields_link 'Remove Description', class:'btn btn-danger btn-xs' %>
-          <%= render 'language_dropdown_form', f: f, description: description %>
+          <div class="field">
+            <%= f.label :language %><br>
+            <%= description.collection_select :language, Description::LANGUAGES, :to_s, :to_s, include_blank: false %>
+          </div>
         </div>
     <% end %>
     <%= f.add_nested_fields_link :descriptions, 'Add Description', class:'btn btn-success' %>

app/views/exercises/_language_dropdown_form.html.erb

@@ -7,8 +7,10 @@
 <dl class="dl-horizontal">
   <dt><%= 'Title' %>:</dt>
   <dd><%= @exercise.title %></dd>
-  <dt><%= 'Description' %>:</dt>
-  <dd><%= @exercise.description %></dd>
+  <% @exercise.descriptions.each do |description|%>
+      <dt><%= 'Description in' %> <%= description.language %>:</dt>
+      <dd><%= description.text %></dd>
+  <% end %>
   <dt><%= 'Visibility' %>:</dt>
   <dd><%= @exercise.public ? 'public' : 'private' %></dd>
   <dt><%= 'Created by' %>:</dt>