Added migration to warn on existing files attached to projects and versions

db/migrate/20130807141542_remove_files_attached_to_projects_and_versions.rb

@@ -0,0 +1,17 @@
+class RemoveFilesAttachedToProjectsAndVersions < ActiveRecord::Migration
+  def up
+    if  Attachment.where(:container_type => ['Version','Project']).any?
+      raise "There are still attachments attached to Versions or Projects, please remove them."
+    end
+    #undocument this code if you want do delete all existing files attached to projects and versions
+    #path = Rails.root.to_s + '/files/'
+    #Attachment.where(:container_type => ['Version','Project']).each do |attachment|
+    #  file = path + attachment.disk_filename
+    #  File.delete(file) if File.exists?(file)
+    #end
+    #Attachment.where(:container_type => ['Version','Project']).delete_all
+  end
+
+  def down
+  end
+end