+ if ($params{save_validity}) {
+ my $valid_index = "$params{name_prefix}cvar_$config->{name}$params{name_postfix}_valid";
+ my $new_valid = $params{variables}{$valid_index} || $params{always_valid} ? 1 : 0;
+ my $old_valid = $self->get_custom_variables_validity(trans_id => $params{trans_id}, config_id => $config->{id});
+
+ $self->save_custom_variables_validity(trans_id => $params{trans_id},
+ config_id => $config->{id},
+ validity => $new_valid,
+ );
+
+ if (!$new_valid || !$old_valid) {
+ # When activating a cvar (old_valid == 0 && new_valid == 1)
+ # the input to hold the variable's value wasn't actually
+ # rendered, meaning saving the value now would only save an
+ # empty value/the value 0. This means that the next time the
+ # form is rendered, an existing value is found and used
+ # instead of the variable's default value from the
+ # configuration. Therefore don't save the values in such
+ # cases.
+ next;
+ }
+ }
+