Hi, every boday, I am newer to DBIx::Class I am readding the CookeBook but there is a issue in that example:
SELECT DISTINCT with multiple columns<http://search.cpan.org/%7Eash/DBIx-Class-0.08010/lib/DBIx/Class/Manual/Cookbook.pod#___top> my $rs = $schema->resultset('Foo')->search( {}, { select => [ { distinct => [ $source->columns ] } ], as => [ $source->columns ] # remember 'as' is not the same as SQL AS :-) } ); my $count = $rs->next->get_column('count'); so , here. that variable $source, what's mean about the $source? and where's we defined it? who can help me explain that variable? thanks very much Mike.G
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