NAME

       Jifty::DBI::Collection::Unique - Ensure uniqueness of records in a collection

SYNOPSIS

           package Foo::Collection;
           use base 'Jifty::DBI::Collection';

           use Jifty::DBI::Collection::Unique; # mixin

           my $collection = Foo::Collection->New();
           $collection->SetupComplicatedJoins;
           $collection->OrderByMagic;

           while (my $thing = $collection->Next) {
               # $thing is going to be distinct
           }

DESCRIPTION

       Currently, Jifty::DBI makes exceptions for databases which cannot handle both "SELECT
       DISTINCT" and ordering in the same statement; it drops the "DISTINCT" requirement. This,
       of course, means that you can get the same row twice, which you might not want. If that's
       the case, use this module as a mix-in, and it will provide you with an "AddRecord" method
       which ensures that a record will not appear twice in the same search.

AUTHOR

       Simon Cozens.

COPYRIGHT

       Copyright 2005 Best Practical Solutions, LLC

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.