=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 {
return (map { $self->{_column_data}{$_} } keys %{$self->_primaries});
}
-=item set_primary_key <@cols>
+=head2 set_primary_key(@cols)
-define one or more columns as primary key for this class
+Defines one or more columns as primary key for this class. Should be
+called after C<columns>.
=cut
$class->_primaries(\%pri);
}
-=item find
+=head2 find(@colvalues), find(\%cols)
-Finds columns based on the primary key(s).
+Finds a row based on its primary key(s).
=cut
$class->throw( "Can't find unless all primary keys are specified" )
unless (keys %$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 ? $class->_row_to_object(\@cols, \@row) : ());
}
-=item discard_changes
+=head2 discard_changes
-Roll back changes that hasn't been comitted to the database.
+Re-selects the row from the database, losing any changes that had
+been made.
=cut
my ($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;
return $self;
}
-=item id
+=head2 id
-returns the primary key(s) for the current row. Can't be called as
+Returns the primary key(s) for a row. Can't be called as
a class method.
=cut
return (wantarray ? @pk : $pk[0]);
}
-=item primary_columns
+=head2 primary_columns
-read-only accessor which returns a list of primary keys.
+Read-only accessor which returns the list of primary keys for a class
+(in scalar context, only returns the first primary key).
=cut
return keys %{shift->_primaries};
}
+=head2 ID
+
+Returns a unique id string identifying a row object by primary key.
+Used by L<DBIx::Class::CDBICompat::LiveObjectIndex> and
+L<DBIx::Class::ObjectCache>.
+
+=cut
+
sub ID {
my ($self) = @_;
$self->throw( "Can't call ID() as a class method" ) unless ref $self;
1;
-=back
-
=head1 AUTHORS
Matt S. Trout <mst@shadowcatsystems.co.uk>