mastodon/db/migrate/20171010025614_change_accounts_nonnullable_in_account_moderation_notes.rb

class ChangeAccountsNonnullableInAccountModerationNotes < ActiveRecord::Migration[5.1]
  def change
    safety_assured do
      change_column_null :account_moderation_notes, :account_id, false
      change_column_null :account_moderation_notes, :target_account_id, false
    end
  end
end