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

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


add_record

Overrides add_record to ensure uniqueness.


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.

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