If the values passed or any of the column values set on the object
contain scalar references, e.g.:
- $row->last_modified(\'NOW()');
+ $row->last_modified(\'NOW()')->update();
# OR
$row->update({ last_modified => \'NOW()' });
=back
Throws an exception if the column name given doesn't exist according
-to L</has_column>.
+to L<has_column|DBIx::Class::ResultSource/has_column>.
Returns a raw column value from the row object, if it has already
been fetched from the database or set by an accessor.
foreach my $pre (keys %{$prefetch||{}}) {
- my $pre_source = $source->related_source($pre)
- or $class->throw_exception("Can't prefetch non-existent relationship ${pre}");
-
- my $accessor = $source->relationship_info($pre)->{attrs}{accessor}
- or $class->throw_exception("No accessor for prefetched $pre");
-
my @pre_vals;
- if (ref $prefetch->{$pre}[0] eq 'ARRAY') {
- @pre_vals = @{$prefetch->{$pre}};
+ if (! @{$prefetch->{$pre}}) {
+ # nothing, empty @pre_vals is put in the caches
}
- elsif ($accessor eq 'multi') {
- $class->throw_exception("Implicit prefetch (via select/columns) not supported with accessor 'multi'");
+ elsif (ref $prefetch->{$pre}[0] eq 'ARRAY') {
+ @pre_vals = @{$prefetch->{$pre}};
}
else {
@pre_vals = $prefetch->{$pre};
}
+ my $pre_source = $source->related_source($pre);
+
+ my $accessor = $source->relationship_info($pre)->{attrs}{accessor}
+ or $class->throw_exception("No accessor type declared for prefetched relationship '$pre'");
+
my @pre_objects;
for my $me_pref (@pre_vals) {
- # FIXME - this should not be necessary
- # the collapser currently *could* return bogus elements with all
- # columns set to undef
- my $has_def;
- for (values %{$me_pref->[0]}) {
- if (defined $_) {
- $has_def++;
- last;
- }
- }
- next unless $has_def;
+ # FIXME SUBOPTIMAL - the new row parsers can very well optimize
+ # this away entirely, and *never* return such empty rows.
+ # For now we maintain inflate_result API backcompat
+ next unless first { defined $_ } values %{$me_pref->[0]};
- push @pre_objects, $pre_source->result_class->inflate_result(
- $pre_source, @$me_pref
- );
+ push @pre_objects, $pre_source->result_class->inflate_result(
+ $pre_source, @$me_pref
+ );
}
if ($accessor eq 'single') {
}
}
-
=head2 throw_exception
See L<DBIx::Class::Schema/throw_exception>.