use base qw/DBIx::Class::Row/;
-=head1 NAME
+=head1 NAME
DBIx::Class::PK - Primary Key class
=head1 DESCRIPTION
-This class contains methods for handling primary keys and methods
+This class contains methods for handling primary keys and methods
depending on them.
=head1 METHODS
=cut
-sub _ident_cond {
- my ($class) = @_;
- return join(" AND ", map { "$_ = ?" } $class->primary_columns);
-}
-
-sub _ident_values {
- my ($self) = @_;
- return (map { $self->{_column_data}{$_} } $self->primary_columns);
-}
-
-=head2 discard_changes
-
-Re-selects the row from the database, losing any changes that had
-been made.
-
-=cut
-
-sub discard_changes {
- my ($self) = @_;
- delete $self->{_dirty_columns};
- return unless $self->in_storage; # Don't reload if we aren't real!
- my ($reload) = $self->result_source->resultset->find(map { $self->$_ } $self->primary_columns);
- unless ($reload) { # If we got deleted in the mean-time
- $self->in_storage(0);
- return $self;
- }
- delete @{$self}{keys %$self};
- @{$self}{keys %$reload} = values %$reload;
- return $self;
-}
-
=head2 id
Returns the primary key(s) for a row. Can't be called as
sub id {
my ($self) = @_;
- $self->throw_exception( "Can't call id() as a class method" ) unless ref $self;
+ $self->throw_exception( "Can't call id() as a class method" )
+ unless ref $self;
my @pk = $self->_ident_values;
return (wantarray ? @pk : $pk[0]);
}
+sub _ident_values {
+ my ($self) = @_;
+ return (map { $self->{_column_data}{$_} } $self->primary_columns);
+}
+
=head2 ID
Returns a unique id string identifying a row object by primary key.
-Used by L<DBIx::Class::CDBICompat::LiveObjectIndex> and
+Used by L<DBIx::Class::CDBICompat::LiveObjectIndex> and
L<DBIx::Class::ObjectCache>.
+=over
+
+=item WARNING
+
+The default C<_create_ID> method used by this function orders the returned
+values by the alphabetical order of the primary column names, B<unlike>
+the L</id> method, which follows the same order in which columns were fed
+to L<DBIx::Class::ResultSource/set_primary_key>.
+
+=back
+
=cut
sub ID {
my ($self) = @_;
- $self->throw_exception( "Can't call ID() as a class method" ) unless ref $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);
+ 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;
+ 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;
+ my $prefix = defined $alias ? $alias.'.' : '';
+ $cond{$prefix.$_} = $self->get_column($_) for $self->primary_columns;
return \%cond;
}