package SQL::Translator::Schema::Constraint;
# ----------------------------------------------------------------------
-# $Id: Constraint.pm,v 1.7 2003-06-27 16:47:40 kycl4rk Exp $
+# $Id: Constraint.pm,v 1.9 2003-09-25 01:31:28 allenday Exp $
# ----------------------------------------------------------------------
# Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>
#
use base 'Class::Base';
use vars qw($VERSION $TABLE_COUNT $VIEW_COUNT);
-$VERSION = sprintf "%d.%02d", q$Revision: 1.7 $ =~ /(\d+)\.(\d+)/;
+$VERSION = sprintf "%d.%02d", q$Revision: 1.9 $ =~ /(\d+)\.(\d+)/;
my %VALID_CONSTRAINT_TYPE = (
PRIMARY_KEY, 1,
type => 'foreign_key', # type of table constraint
name => 'fk_phone_id', # name of the constraint
fields => 'phone_id', # field in the referring table
- reference_fields => 'phone_id', # referenced table
- reference_table => 'phone', # referenced fields
+ reference_fields => 'phone_id', # referenced field
+ reference_table => 'phone', # referenced table
match_type => 'full', # how to match
on_delete_do => 'cascade', # what to do on deletes
on_update_do => '', # what to do on updates
my ( $self, $config ) = @_;
my @fields = qw[
table name type fields reference_fields reference_table
- match_type on_delete on_update
+ match_type on_delete on_update expression
];
for my $arg ( @fields ) {
next unless $config->{ $arg };
+ next if ref $config->{ $arg } eq 'ARRAY' && ! @{ $config->{ $arg } };
defined $self->$arg( $config->{ $arg } ) or return;
}
$self->{'fields'} = \@unique;
}
- return wantarray ? @{ $self->{'fields'} || [] } : $self->{'fields'};
+ if ( @{ $self->{'fields'} || [] } ) {
+ return wantarray ? @{ $self->{'fields'} } : $self->{'fields'};
+ }
+ else {
+ return wantarray ? () : undef;
+ }
}
# ----------------------------------------------------------------------