+ my ( $self, $name, $updates, $object, $if_not_submitted ) = @_;
+
+ # this should never happen because we're checking the paramters passed to
+ # recursive_update, but just to be sure...
+ $object->throw_exception("No such relationship '$name'")
+ unless $object->has_relationship($name);
+
+ #warn "_update_relation $name: OBJ: " . ref($object) . "\n";
+
+ my $info = $object->result_source->relationship_info($name);
+
+ # get a related resultset without a condition
+ my $related_resultset =
+ $self->related_resultset($name)->result_source->resultset;
+ my $resolved;
+ if ( $self->result_source->can('_resolve_condition') ) {
+ $resolved =
+ $self->result_source->_resolve_condition( $info->{cond}, $name,
+ $object );
+ }
+ else {
+ $self->throw_exception(
+ "result_source must support _resolve_condition");
+ }
+
+ # warn "$name resolved: " . Dumper( $resolved ); use Data::Dumper;
+ $resolved = {}
+ if defined $DBIx::Class::ResultSource::UNRESOLVABLE_CONDITION
+ && $DBIx::Class::ResultSource::UNRESOLVABLE_CONDITION
+ == $resolved;
+
+ my @rel_cols = keys %{ $info->{cond} };
+ map {s/^foreign\.//} @rel_cols;
+
+ #warn "REL_COLS: " . Dumper(@rel_cols); use Data::Dumper;
+ my $rel_col_cnt = scalar @rel_cols;
+
+ # find out if all related columns are nullable
+ my $all_fks_nullable = 1;
+ for my $rel_col (@rel_cols) {
+ $all_fks_nullable = 0
+ unless $related_resultset->result_source->column_info($rel_col)
+ ->{is_nullable};
+ }
+
+ #warn "\tNULLABLE: $all_fks_nullable\n";
+ $if_not_submitted = $all_fks_nullable ? 'nullify' : 'delete'
+ unless defined $if_not_submitted;
+
+ # handle undef
+ #if (not defined $updates && $if_not_submitted eq 'delete') {
+ # warn "$name " . ref $object;
+ # $object->related_resultset($name)->delete;
+ # return;
+ #}
+
+ #warn "RELINFO for $name: " . Dumper($info); use Data::Dumper;
+
+ # the only valid datatype for a has_many rels is an arrayref
+ if ( $info->{attrs}{accessor} eq 'multi' ) {
+ $self->throw_exception(
+ "data for has_many relationship '$name' must be an arrayref")
+ unless ref $updates eq 'ARRAY';
+
+ my @updated_objs;
+
+ #warn "\tupdating has_many rel '$name' ($rel_col_cnt columns cols)\n";
+ for my $sub_updates ( @{$updates} ) {
+ my $sub_object = recursive_update(
+ resultset => $related_resultset,
+ updates => $sub_updates,
+ resolved => $resolved
+ );
+
+ push @updated_objs, $sub_object;
+ }
+
+ #warn "\tcreated and updated related rows\n";
+
+ my @cond;
+ my @related_pks = $related_resultset->result_source->primary_columns;
+ for my $obj (@updated_objs) {
+ my %cond_for_obj;
+ for my $col (@related_pks) {
+ $cond_for_obj{$col} = $obj->get_column($col);
+ }
+ push @cond, \%cond_for_obj;
+ }
+ my %cond = ( -not => [@cond] );
+
+ #warn "\tCOND: " . Dumper(\%cond);
+ my $rs_rel_delist = $object->$name->search_rs( \%cond );
+
+ #my $rel_delist_cnt = $rs_rel_delist->count;
+ my @foo = $rs_rel_delist->all;
+ if ( $if_not_submitted eq 'delete' ) {
+
+ #warn "\tdeleting related rows: $rel_delist_cnt\n";
+ $rs_rel_delist->delete;
+
+ # # only handles related result classes with single primary keys
+ # if ( 1 == $rel_col_cnt ) {
+ # $object->$name->search(
+ # { $rel_cols[0] =>
+ # { -not_in => [ map ( $_->id, @updated_objs ) ] }
+ # }
+ # )->delete;
+ # }
+ # else {
+ # warn "multi-column relationships aren't supported\n";
+ # }
+ }
+ elsif ( $if_not_submitted eq 'set_to_null' ) {
+
+ #warn "\tnullifying related rows: $rel_delist_cnt\n";
+ my %update = map { $_ => undef } @rel_cols;
+ $rs_rel_delist->update( \%update );
+
+ # # only handles related result classes with single primary keys
+ # if ( 1 == $rel_col_cnt ) {
+ # $object->$name->search(
+ # { $rel_cols[0] =>
+ # { -not_in => [ map ( $_->id, @updated_objs ) ] }
+ # }
+ # )->update( { $rel_cols[0] => undef } );
+ # }
+ # else {
+ # warn "multi-column relationships aren't supported\n";
+ # }