Also takes an options hashref of C<< column_name => value> pairs >> to update
first. But be aware that this hashref might be edited in place, so dont rely on
-it being the same after a call to C<update>.
+it being the same after a call to C<update>. If you need to preserve the hashref,
+it is sufficient to pass a shallow copy to C<update>, e.g. ( { %{ $href } } )
=cut
sub throw_exception {
my $self=shift;
- if (ref $self && ref $self->result_source) {
+ if (ref $self && ref $self->result_source && $self->result_source->schema) {
$self->result_source->schema->throw_exception(@_);
} else {
croak(@_);