use strict;
use warnings;
-use base qw/Class::Data::Inheritable DBIx::Class::SQL/;
+use base qw/DBIx::Class::Row/;
-__PACKAGE__->mk_classdata('_primaries' => {});
+=head1 NAME
+
+DBIx::Class::PK - Primary Key class
+
+=head1 SYNOPSIS
+
+=head1 DESCRIPTION
+
+This class contains methods for handling primary keys and methods
+depending on them.
+
+=head1 METHODS
+
+=cut
sub _ident_cond {
my ($class) = @_;
- return join(" AND ", map { "$_ = ?" } keys %{$class->_primaries});
+ return join(" AND ", map { "$_ = ?" } $class->primary_columns);
}
sub _ident_values {
my ($self) = @_;
- return (map { $self->{_column_data}{$_} } keys %{$self->_primaries});
+ return (map { $self->{_column_data}{$_} } $self->primary_columns);
}
-sub set_primary {
- my ($class, @cols) = @_;
- my %pri;
- $pri{$_} = {} for @cols;
- $class->_primaries(\%pri);
-}
+=head2 discard_changes
+
+Re-selects the row from the database, losing any changes that had
+been made.
-sub retrieve {
- my ($class, @vals) = @_;
- my @pk = keys %{$class->_primaries};
- die "Can't retrieve 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];
- } else {
- $query = {@vals};
+=cut
+
+sub discard_changes {
+ my ($self) = @_;
+ delete $self->{_dirty_columns};
+ return unless $self->in_storage; # Don't reload if we aren't real!
+ my ($reload) = $self->result_source->resultset->find
+ (map { $self->$_ } $self->primary_columns);
+ unless ($reload) { # If we got deleted in the mean-time
+ $self->in_storage(0);
+ return $self;
}
- die "Can't retrieve unless all primary keys are specified"
- unless (keys %$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];
+ delete @{$self}{keys %$self};
+ @{$self}{keys %$reload} = values %$reload;
+ return $self;
+}
+
+=head2 id
+
+Returns the primary key(s) for a row. Can't be called as
+a class method.
+
+=cut
+
+sub id {
+ my ($self) = @_;
+ $self->throw_exception( "Can't call id() as a class method" )
+ unless ref $self;
+ my @pk = $self->_ident_values;
+ return (wantarray ? @pk : $pk[0]);
+}
+
+=head2 ID
+
+Returns a unique id string identifying a row object by primary key.
+Used by L<DBIx::Class::CDBICompat::LiveObjectIndex> and
+L<DBIx::Class::ObjectCache>.
+
+=cut
+
+sub ID {
+ my ($self) = @_;
+ $self->throw_exception( "Can't call ID() as a class method" )
+ unless ref $self;
+ return undef unless $self->in_storage;
+ return $self->_create_ID(map { $_ => $self->{_column_data}{$_} }
+ $self->primary_columns);
+}
+
+sub _create_ID {
+ my ($self,%vals) = @_;
+ return undef unless 0 == grep { !defined } values %vals;
+ return join '|', ref $self || $self, $self->result_source->name,
+ map { $_ . '=' . $vals{$_} } sort keys %vals;
+}
+
+=head2 ident_condition
+
+ my $cond = $result_source->ident_condition();
+
+ my $cond = $result_source->ident_condition('alias');
+
+Produces a condition hash to locate a row based on the primary key(s).
+
+=cut
+
+sub ident_condition {
+ my ($self, $alias) = @_;
+ my %cond;
+ $cond{(defined $alias ? "${alias}.$_" : $_)} = $self->get_column($_)
+ for $self->primary_columns;
+ return \%cond;
}
1;
+
+=head1 AUTHORS
+
+Matt S. Trout <mst@shadowcatsystems.co.uk>
+
+=head1 LICENSE
+
+You may distribute this code under the same terms as Perl itself.
+
+=cut
+