Use the standard helper function for displaying custom values

app/models/dmsf_file.rb

@@ -500,11 +500,7 @@ class DmsfFile < ActiveRecord::Base
   def custom_value(custom_field)
     last_revision.custom_field_values.each do |cv|
       if cv.custom_field == custom_field
-        if cv.value.is_a? Array
-          return cv.value.reject{ |x| x.empty? }.join(',')
-        else
-          return cv.value
-        end
+        return cv
       end
     end
     nil
@@ -584,7 +580,7 @@ class DmsfFile < ActiveRecord::Base
     end
     # Custom fields
     CustomField.where(type: 'DmsfFileRevisionCustomField').order(:position).each do |c|
-      csv << custom_value(c) if columns.include?(c.name)
+      csv << custom_value(c).value if columns.include?(c.name)
     end
     csv
   end

app/models/dmsf_folder.rb

@@ -348,7 +348,9 @@ class DmsfFolder < ActiveRecord::Base
 
   def custom_value(custom_field)
     custom_field_values.each do |cv|
-      return cv.value if cv.custom_field == custom_field
+      if cv.custom_field == custom_field
+        return cv
+      end
     end
     nil
   end
@@ -475,7 +477,7 @@ class DmsfFolder < ActiveRecord::Base
     csv << '' if columns.include?(l(:label_last_revision_id))
     # Custom fields
     CustomField.where(type: 'DmsfFileRevisionCustomField').order(:position).each do |c|
-      csv << custom_value(c) if columns.include?(c.name)
+      csv << custom_value(c).value if columns.include?(c.name)
     end
     csv
   end

app/views/dmsf/_dir.html.erb

@@ -75,7 +75,7 @@
 <% CustomField.where(type: 'DmsfFileRevisionCustomField').order(:position).each do |c| %>
     <% if DmsfFolder.is_column_on?(c.name) %>
         <td class="dmsf_cf">
-          <%= subfolder.custom_value(c) if subfolder %>
+          <%= show_value(subfolder.custom_value(c)) if subfolder %>
         </td>
     <% end %>
 <% end %>

app/views/dmsf/_dir_trash.html.erb

@@ -59,7 +59,7 @@
 <% CustomField.where(type: 'DmsfFileRevisionCustomField').order(:position).each do |c| %>
     <% if DmsfFolder.is_column_on?(c.name) %>
         <td class="dmsf_cf">
-          <%= subfolder.custom_value(c) if subfolder %>
+          <%= show_value(subfolder.custom_value(c)) if subfolder %>
         </td>
     <% end %>
 <% end %>

app/views/dmsf/_file.html.erb

@@ -79,7 +79,7 @@
 <% CustomField.where(type: 'DmsfFileRevisionCustomField').order(:position).each do |c| %>
     <% if DmsfFolder.is_column_on?(c.name) %>
         <td class="dmsf_cf">
-          <%= file.custom_value(c) %>
+          <%= show_value file.custom_value(c) %>
         </td>
     <% end %>
 <% end %>

app/views/dmsf/_file_trash.html.erb

@@ -59,7 +59,7 @@
 <% CustomField.where(type: 'DmsfFileRevisionCustomField').order(:position).each do |c| %>
     <% if DmsfFolder.is_column_on?(c.name) %>
         <td class="dmsf_cf">
-          <%= file.custom_value(c) %>
+          <%= show_value file.custom_value(c) %>
         </td>
     <% end %>
 <% end %>