use Modern::Perl;

return {
    bug_number => "22690",
    description => "Add contraints to the linktracker table",
    up => sub {
        my ($args) = @_;
        my ($dbh, $out) = @$args{qw(dbh out)};

        unless( foreign_key_exists( 'linktracker', 'linktracker_biblio_ibfk' ) ) {
            $dbh->do(q{ UPDATE linktracker SET biblionumber = NULL WHERE biblionumber NOT IN (SELECT biblionumber FROM biblio) });
            $dbh->do(q{ ALTER TABLE linktracker ADD CONSTRAINT `linktracker_biblio_ibfk` FOREIGN KEY (`biblionumber`) REFERENCES `biblio` (`biblionumber`) ON DELETE SET NULL ON UPDATE SET NULL });
        }

        unless( foreign_key_exists( 'linktracker', 'linktracker_item_ibfk' ) ) {
            $dbh->do(q{ UPDATE linktracker SET itemnumber = NULL WHERE itemnumber NOT IN (SELECT itemnumber FROM items) });
            $dbh->do(q{ ALTER TABLE linktracker ADD CONSTRAINT `linktracker_item_ibfk` FOREIGN KEY (`itemnumber`) REFERENCES `items` (`itemnumber`) ON DELETE SET NULL ON UPDATE SET NULL });
        }

        unless( foreign_key_exists( 'linktracker', 'linktracker_borrower_ibfk' ) ) {
            $dbh->do(q{ UPDATE linktracker SET borrowernumber = NULL WHERE borrowernumber NOT IN (SELECT borrowernumber FROM borrowers) });
            $dbh->do(q{ ALTER TABLE linktracker ADD CONSTRAINT `linktracker_borrower_ibfk` FOREIGN KEY (`borrowernumber`) REFERENCES `borrowers` (`borrowernumber`) ON DELETE SET NULL ON UPDATE SET NULL });
        }
    },
}