use warnings;
use Tie::IxHash;
-use base qw/Class::Data::Inheritable/;
+use base qw/DBIx::Class::Row/;
__PACKAGE__->mk_classdata('_primaries' => {});
=head1 DESCRIPTION
-This class represents methods handling primary keys
-and depending on them.
+This class contains methods for handling primary keys and methods
+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 %{$self->_primaries});
}
+=head2 set_primary_key(@cols)
+
+Defines one or more columns as primary key for this class. Should be
+called after C<columns>.
+
+=cut
+
sub set_primary_key {
my ($class, @cols) = @_;
+ # check if primary key columns are valid columns
+ for (@cols) {
+ $class->throw( "Column $_ can't be used as primary key because it isn't defined in $class" )
+ unless $class->has_column($_);
+ }
my %pri;
- tie %pri, 'Tie::IxHash';
- %pri = map { $_ => {} } @cols;
+ tie %pri, 'Tie::IxHash', map { $_ => {} } @cols;
$class->_primaries(\%pri);
}
+=head2 find(@colvalues), find(\%cols)
+
+Finds a row based on its primary key(s).
+
+=cut
+
sub find {
my ($class, @vals) = @_;
my $attrs = (@vals > 1 && ref $vals[$#vals] eq 'HASH' ? pop(@vals) : {});
$class->throw( "Can't find unless all primary keys are specified" )
unless (keys %$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)->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) : ());
+ return $class->search($query)->next;
+ #my @cols = $class->_select_columns;
+ #my @row = $class->storage->select_single($class->_table_name, \@cols, $query);
+ #return (@row ? $class->_row_to_object(\@cols, \@row) : ());
}
+=head2 discard_changes
+
+Re-selects the row from the database, losing any changes that had
+been made.
+
+=cut
+
sub discard_changes {
my ($self) = @_;
delete $self->{_dirty_columns};
return unless $self->in_storage; # Don't reload if we aren't real!
- my ($reload) = $self->find($self->id);
+ my ($reload) = $self->find(map { $self->$_ } $self->primary_columns);
unless ($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 $self;
}
+=head2 id
+
+Returns the primary key(s) for a row. Can't be called as
+a class method.
+
+=cut
+
sub id {
my ($self) = @_;
$self->throw( "Can't call id() as a class method" ) unless ref $self;
return (wantarray ? @pk : $pk[0]);
}
+=head2 primary_columns
+
+Read-only accessor which returns the list of primary keys for a class
+(in scalar context, only returns the first primary key).
+
+=cut
+
sub primary_columns {
return keys %{shift->_primaries};
}
-1;
+=head2 ID
+
+Returns a unique id string identifying a row object by primary key.
+Used by L<DBIx::Class::CDBICompat::LiveObjectIndex> and
+L<DBIx::Class::ObjectCache>.
+
+=cut
-=back
+sub ID {
+ my ($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) = @_;
+ return undef unless 0 == grep { !defined } values %vals;
+ $class = ref $class || $class;
+ return join '|', $class, map { $_ . '=' . $vals{$_} } sort keys %vals;
+}
+
+sub ident_condition {
+ my ($self) = @_;
+ my %cond;
+ $cond{$_} = $self->get_column($_) for $self->primary_columns;
+ return \%cond;
+}
+
+1;
=head1 AUTHORS