Add rake task to migrate investment's internal comments to thread

lib/tasks/investments.rake

@@ -0,0 +1,12 @@
+namespace :investments do
+  namespace :internal_comments do
+    desc "Migrate internal_comments textarea to a first comment on internal thread"
+    task migrate_to_thread: :environment do
+      comments_author_id = Administrator.first.user.id
+      Budget::Investment.where.not(internal_comments: [nil, '']).find_each do |investment|
+        Comment.create(commentable: investment, user_id: comments_author_id,
+                       body: investment.internal_comments, valuation: true)
+      end
+    end
+  end
+end