__PACKAGE__->ensure_class_loaded('DBIx::Class::Storage::DBI::MariaDB');

##</code><code>##

__PACKAGE__->add_unique_constraint(
  "PRIMARY", ["id"]
);

##</code><code>##

Error:  {UNKNOWN}: DBIx::Class::ResultSource::_pri_cols_or_die(): Operation requires a primary key to be declared on 'MyApp::Schema::XYZ' via set_primary_key ...

##</code><code>##

# when I am using DBI:mysql ...
__PACKAGE__->add_columns(
  "id", {
      "is_auto_increment" => "1",
      "data_type" => "mediumint",
      ...
   }
);
__PACKAGE__->set_primary_key("id");