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});
return (map { $self->{_column_data}{$_} } keys %{$self->_primaries});
}
-sub set_primary {
+sub set_primary_key {
my ($class, @cols) = @_;
my %pri;
- $pri{$_} = {} for @cols;
+ tie %pri, 'Tie::IxHash', 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 = $vals[0];
- } elsif (@pk == 1 && @vals == 1) {
- return ($class->retrieve_from_sql($class->_ident_cond, $vals[0]))[0];
+ } elsif (@pk == @vals) {
+ $query = {};
+ @{$query}{@pk} = @vals;
+ #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
- return ($class->search($query))[0];
+ #return $class->search($query)->next;
+ my @cols = $class->_select_columns;
+ my @row = $class->storage->select_single($class->_table_name, \@cols, $query);
+ return (@row ? $class->_row_to_object(\@cols, \@row) : ());
+}
+
+sub discard_changes {
+ my ($self) = @_;
+ delete $self->{_dirty_columns};
+ 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 : $pk[0]);
+}
+
+sub primary_columns {
+ return keys %{shift->_primaries};
+}
+
+sub ID {
+ my ($self) = @_;
+ $self->throw( "Can't call ID() as a class method" ) unless ref $self;
+ return undef unless $self->in_storage;
+ return $self->_create_ID(map { $_ => $self->{_column_data}{$_} } keys %{$self->_primaries});
+}
+
+sub _create_ID {
+ my ($class,%vals) = @_;
+ $class = ref $class || $class;
+ return join '|', $class, map { $_ . '=' . $vals{$_} } sort keys %vals;
}
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
+