migrating thumbnail to paperclip

Signed-off-by: man13 <man13@inf.ufpr.br>

app/models/learning_object.rb

@@ -4,6 +4,8 @@ class LearningObject < ActiveRecord::Base
   include Sociable
   include Stateful
 
+  has_attached_file :thumbnail, styles: {medium: "530x300", small: "250x140"}
+
   has_and_belongs_to_many :topics
 
   has_many :collection_items, as: :collectionable

db/migrate/20160219132305_remove_string_thumbnail.rb

+class RemoveStringThumbnail < ActiveRecord::Migration
+  def change
+    remove_column :learning_objects, :thumbnail, :string
+  end
+end

db/migrate/20160219132533_add_paperclip_thumbnail.rb

+class AddPaperclipThumbnail < ActiveRecord::Migration
+  def up
+    add_attachment :learning_objects, :thumbnail
+  end
+
+  def down
+    remove_attachment :learning_objects, :thumbnail
+  end
+end