use strict;
use warnings;
+use Tie::IxHash;
-use base qw/Class::Data::Inheritable DBIx::Class::SQL/;
+use base qw/Class::Data::Inheritable/;
__PACKAGE__->mk_classdata('_primaries' => {});
+=head1 NAME
+
+DBIx::Class::PK - Primary Key class
+
+=head1 SYNOPSIS
+
+=head1 DESCRIPTION
+
+This class represents methods handling primary keys
+and depending on them.
+
+=head1 METHODS
+
+=over 4
+
+=cut
+
+
sub _ident_cond {
my ($class) = @_;
return join(" AND ", map { "$_ = ?" } keys %{$class->_primaries});
sub set_primary_key {
my ($class, @cols) = @_;
my %pri;
- $pri{$_} = {} for @cols;
+ tie %pri, 'Tie::IxHash';
+ %pri = map { $_ => {} } @cols;
$class->_primaries(\%pri);
}
-sub retrieve {
+sub find {
my ($class, @vals) = @_;
+ my $attrs = (@vals > 1 && ref $vals[$#vals] eq 'HASH' ? pop(@vals) : {});
my @pk = keys %{$class->_primaries};
- die "Can't retrieve unless primary columns are defined" unless @pk;
+ $class->throw( "Can't find unless primary columns are defined" )
+ unless @pk;
my $query;
if (ref $vals[0] eq 'HASH') {
$query = $vals[0];
} elsif (@pk == @vals) {
- my $ret = ($class->retrieve_from_sql($class->_ident_cond, @vals))[0];
+ my $ret = ($class->search_literal($class->_ident_cond, @vals, $attrs))[0];
#warn "$class: ".join(', ', %{$ret->{_column_data}});
return $ret;
} else {
$query = {@vals};
}
- die "Can't retrieve unless all primary keys are specified"
+ $class->throw( "Can't find unless all primary keys are specified" )
unless (keys %$query >= @pk); # If we check 'em we run afoul of uc/lc
# column names etc. Not sure what to do yet
my $ret = ($class->search($query))[0];
sub discard_changes {
my ($self) = @_;
delete $self->{_dirty_columns};
- $_[0] = $self->retrieve($self->id);
+ return unless $self->in_storage; # Don't reload if we aren't real!
+ my ($reload) = $self->find($self->id);
+ unless ($reload) { # If we got deleted in the mean-time
+ $self->in_storage(0);
+ return $self;
+ }
+ delete @{$self}{keys %$self};
+ @{$self}{keys %$reload} = values %$reload;
+ #$self->store_column($_ => $reload->get_column($_))
+ # foreach keys %{$self->_columns};
+ return $self;
+}
+
+sub id {
+ my ($self) = @_;
+ $self->throw( "Can't call id() as a class method" ) unless ref $self;
+ my @pk = $self->_ident_values;
+ return (wantarray ? @pk : $pk[0]);
+}
+
+sub primary_columns {
+ return keys %{shift->_primaries};
}
1;
+
+=back
+
+=head1 AUTHORS
+
+Matt S. Trout <mst@shadowcatsystems.co.uk>
+
+=head1 LICENSE
+
+You may distribute this code under the same terms as Perl itself.
+
+=cut
+