use strict;
+use Carp;
use English qw(-no_match_vars);
use Rose::DB::Object;
use List::MoreUtils qw(any);
return $result;
}
+sub load_cached {
+ my $class_or_self = shift;
+ my @ids = @_;
+ my $class = ref($class_or_self) || $class_or_self;
+ my $cache = $::request->cache("::SL::DB::Object::object_cache::${class}");
+
+ croak "Missing ID" unless @ids;
+
+ my @missing_ids = grep { !exists $cache->{$_} } @ids;
+
+ return $cache->{$ids[0]} if !@missing_ids;
+
+ croak "Caching can only be used with classes with exactly one primary key column" if 1 != scalar(@{ $class->meta->primary_key_columns });
+
+ my $primary_key = $class->meta->primary_key_columns->[0]->name;
+ my $objects = $class->_get_manager_class->get_all(where => [ $primary_key => \@missing_ids ]);
+
+ $cache->{$_->$primary_key} = $_ for @{ $objects};
+
+ return $cache->{$ids[0]};
+}
+
+sub invalidate_cached {
+ my ($class_or_self, @ids) = @_;
+ my $class = ref($class_or_self) || $class_or_self;
+
+ if (ref($class_or_self) && !@ids) {
+ croak "Caching can only be used with classes with exactly one primary key column" if 1 != scalar(@{ $class->meta->primary_key_columns });
+
+ my $primary_key = $class->meta->primary_key_columns->[0]->name;
+ @ids = ($class_or_self->$primary_key);
+ }
+
+ delete @{ $::request->cache("::SL::DB::Object::object_cache::${class}") }{ @ids };
+
+ return $class_or_self;
+}
+
1;
__END__
=pod
+=encoding utf8
+
=head1 NAME
SL::DB::Object: Base class for all of our model classes
be used to check whether or not an object's columns are unique before
saving or during validation.
+=item C<load_cached @ids>
+
+Loads objects from the database which haven't been cached before and
+caches them for the duration of the current request (see
+L<SL::Request/cache>).
+
+This method can be called both as an instance method and a class
+method. It loads objects for the corresponding class (e.g. both
+C<SL::DB::Part-E<gt>load_cached(…)> and
+C<$some_part-E<gt>load_cached(…)> will load parts).
+
+Currently only classes with a single primary key column are supported.
+
+Returns the cached object for the first ID.
+
+=item C<invalidate_cached @ids>
+
+Deletes all cached instances of this class (see L</load_cached>) for
+the given IDs.
+
+If called as an instance method without further arguments then the
+object's ID is used.
+
+Returns the object/class it was called on.
+
=back
=head1 AUTHOR