add source to submissions

db/migrate/20230805124454_add_source_to_submissions.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class AddSourceToSubmissions < ActiveRecord::Migration[7.0]
+  class MigrationSubmission < ApplicationRecord
+    self.table_name = 'submissions'
+  end
+
+  def up
+    add_column :submissions, :source, :text
+
+    MigrationSubmission.where(source: nil).update_all(source: :invite)
+
+    change_column_null :submissions, :source, false
+  end
+
+  def down
+    drop_column :submissions, :source
+  end
+end