Ooookay... that's a lot of very helpful answers. Many thanks for all the suggestions, I guess I will go with the helper or with count().
Thanks, Ekki 2015-02-13 11:32 GMT+01:00 Will Crawford <billcrawford1...@gmail.com>: > On 11 February 2015 at 21:58, Ekki Plicht (DF4OR) <e...@plicht.de> wrote: >> Hi, >> I need to check a list of values if they exist in a database. The >> value is a unique key of that table. A stupid 'find' works of course, >> but returns the whole row data, where I only need a simple binary >> yes/no information if a row was found or not. > > Presuming you mean that you need to get a list of them all, there's a > few answers, depending on your needs. A couple of the answers already > given are pretty useful and I'll be filing the "exists" rs method away > for future use. > > Something like > > my %found = map +( $_ => 1 ), > $rs->search_rs( { key => { -in => [ ... ] } } > )->get_column('key')->all; > > might do the trick (not tested for typos). > > _______________________________________________ > List: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/dbix-class > IRC: irc.perl.org#dbix-class > SVN: http://dev.catalyst.perl.org/repos/bast/DBIx-Class/ > Searchable Archive: http://www.grokbase.com/group/dbix-class@lists.scsys.co.uk _______________________________________________ List: http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/dbix-class IRC: irc.perl.org#dbix-class SVN: http://dev.catalyst.perl.org/repos/bast/DBIx-Class/ Searchable Archive: http://www.grokbase.com/group/dbix-class@lists.scsys.co.uk