L<might_have|DBIx::Class::Relationship/might_have>)
relationship accessors of L<DBIx::Class::Row> objects.
+=head1 NOTE
+
+All "Row objects" derived from a Schema-attached L<DBIx::Class::ResultSet>
+object (such as a typical C<< L<search|DBIx::Class::ResultSet/search
+>->L<next|DBIx::Class::ResultSet/next> >> call) are actually Result
+instances, based on your application's
+L<Result class|DBIx::Class::Manual::Glossary/Result_class>.
+
+L<DBIx::Class::Row> implements most of the row-based communication with the
+underlying storage, but a Result class B<should not inherit from it directly>.
+Usually, Result classes inherit from L<DBIx::Class::Core>, which in turn
+combines the methods from several classes, one of them being
+L<DBIx::Class::Row>. Therefore, while many of the methods available to a
+L<DBIx::Class::Core>-derived Result class are described in the following
+documentation, it does not detail all of the methods available to Result
+objects. Refer to L<DBIx::Class::Core> for more info.
+
=head1 METHODS
=head2 new
=item Arguments: \%attrs or \%colsandvalues
-=item Returns: A Row object
+=item Returns: A DBIx::Class::Row object
=back
return $new;
}
+=head2 $column_accessor
+
+ # Each pair does the same thing
+
+ # (un-inflated, regular column)
+ my $val = $row->get_column('first_name');
+ my $val = $row->first_name;
+
+ $row->set_column('first_name' => $val);
+ $row->first_name($val);
+
+ # (inflated column via DBIx::Class::InflateColumn::DateTime)
+ my $val = $row->get_inflated_column('last_modified');
+ my $val = $row->last_modified;
+
+ $row->set_inflated_column('last_modified' => $val);
+ $row->last_modified($val);
+
+=over
+
+=item Arguments: $value?
+
+=item Returns: $value
+
+=back
+
+A column accessor method is created for each column, which is used for
+getting/setting the value for that column.
+
+The actual method name is based on the L<accessor|DBIx::Class::ResultSource/accessor>
+name given in the table definition. Like L</set_column>, this will
+not store the data until L</insert> or L</update> is called on the row.
+
=head2 insert
$row->insert;
If passed an object or reference as a value, this method will happily
attempt to store it, and a later L</insert> or L</update> will try and
stringify/numify as appropriate. To set an object to be deflated
-instead, see L</set_inflated_columns>.
+instead, see L</set_inflated_columns>, or better yet, use L</$column_accessor>.
=cut
foreach my $pre (keys %{$prefetch||{}}) {
- my @pre_vals;
- if (! @{$prefetch->{$pre}}) {
- # nothing, empty @pre_vals is put in the caches
- }
- elsif (ref $prefetch->{$pre}[0] eq 'ARRAY') {
+ my (@pre_vals, $is_multi);
+ if (ref $prefetch->{$pre}[0] eq 'ARRAY') {
+ $is_multi = 1;
@pre_vals = @{$prefetch->{$pre}};
}
else {
@pre_vals = $prefetch->{$pre};
}
- my $pre_source = $source->related_source($pre);
+ my $pre_source = try {
+ $source->related_source($pre)
+ }
+ catch {
+ $class->throw_exception(sprintf
+
+ "Can't inflate manual prefetch into non-existent relationship '%s' from '%s', "
+ . "check the inflation specification (columns/as) ending in '%s.%s'.",
+
+ $pre,
+ $source->source_name,
+ $pre,
+ (keys %{$pre_vals[0][0]})[0] || 'something.something...',
+ );
+ };
my $accessor = $source->relationship_info($pre)->{attrs}{accessor}
- or $class->throw_exception("No accessor type declared for prefetched relationship '$pre'");
+ or $class->throw_exception("No accessor type declared for prefetched $pre");
+
+ if (! $is_multi and $accessor eq 'multi') {
+ $class->throw_exception("Manual prefetch (via select/columns) not supported with accessor 'multi'");
+ }
my @pre_objects;
for my $me_pref (@pre_vals) {
- # 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]};
+ # 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;
- 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') {
return $resultset->find($self->_storage_ident_condition);
}
-=head2 discard_changes ($attrs?)
+=head2 discard_changes
$row->discard_changes
Returns the primary key(s) for a row. Can't be called as a class method.
Actually implemented in L<DBIx::Class::PK>
-=head1 AUTHORS
+=head1 AUTHOR AND CONTRIBUTORS
-Matt S. Trout <mst@shadowcatsystems.co.uk>
+See L<AUTHOR|DBIx::Class/AUTHOR> and L<CONTRIBUTORS|DBIx::Class/CONTRIBUTORS> in DBIx::Class
=head1 LICENSE
projects / dbsrgits/DBIx-Class.git / blobdiff