the migrations to the changes in schema.rb.

db/migrate/20160630154310_add_submission_to_request_for_comments.rb

@@ -0,0 +1,5 @@
+class AddSubmissionToRequestForComments < ActiveRecord::Migration
+  def change
+    add_reference :request_for_comments, :submission
+  end
+end

db/migrate/20160701092140_remove_requested_at_from_request_for_comments.rb

@@ -0,0 +1,5 @@
+class RemoveRequestedAtFromRequestForComments < ActiveRecord::Migration
+  def change
+    remove_column :request_for_comments, :requested_at
+  end
+end