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

       Simon Cozens.

       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.

perl v5.34.0                                       2022-06-15                Jifty::DBI::Collection::Unique(3pm)

       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.

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

           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
           }