internetee-registry/db/migrate/20191004105732_add_blocked_domains_name_uniq_constraint.rb

class AddBlockedDomainsNameUniqConstraint < ActiveRecord::Migration[6.0]
  def up
    execute <<-SQL
      ALTER TABLE blocked_domains ADD CONSTRAINT uniq_blocked_domains_name UNIQUE (name);
    SQL
  end

  def down
    execute <<-SQL
      ALTER TABLE blocked_domains DROP CONSTRAINT uniq_blocked_domains_name;
    SQL
  end
end