1DBIx::Class::Helper::ReUssuelrtSCeotn:t:rOinbeuRtoewdD(B3PI)exr:l:CDloacsusm:e:nHtealtpieorn::ResultSet::OneRow(3)
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NAME

6       DBIx::Class::Helper::ResultSet::OneRow - The first you always wanted
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SYNOPSIS

9        # note that this is normally a component for a ResultSet
10        package MySchema::ResultSet::Person;
11
12        use strict;
13        use warnings;
14
15        use parent 'DBIx::Class::ResultSet';
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17        __PACKAGE__->load_components('Helper::ResultSet::OneRow');
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19        sub person_named {
20           $_[0]->search({ name => $_[1] })->one_row
21        }
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DESCRIPTION

24       This component codifies an alternate version of "first" in
25       DBIx::Class::ResultSet.  In practical use, "first" allows a user to do
26       something like the following:
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28        my $rs = $schema->resultset('Foo')->search({ name => 'bar' });
29        my $first = $rs->first;
30        my @rest;
31        while (my $row = $rs->next) {
32           push @rest, $row
33        }
34
35       Problematically, if you call "first" without the while loop afterwards
36       and you got back more than one row, you are leaving a cursor open.
37       Depending on your database this could increase memory usage or cause
38       errors with later queries.
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40       Fundamentally the difference is that when you use "one_row" you are
41       guaranteed to exhaust the underlying cursor.
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43       Generally speaking, unless you are doing something unusual, "one_row"
44       is a good default.
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METHODS

47   one_row
48       Limits the ResultSet to a single row, and then returns the matching
49       result object. In case no rows match, "undef" is returned as normal.
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THANKS

52       Thanks to Aran Clary Deltac (BLUEFEET) for initially writing this
53       module, and thanks to ZipRecruiter <https://www.ziprecruiter.com> for
54       sponsoring that initial developmentl
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AUTHOR

57       Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>
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60       This software is copyright (c) 2019 by Arthur Axel "fREW" Schmidt.
61
62       This is free software; you can redistribute it and/or modify it under
63       the same terms as the Perl 5 programming language system itself.
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67perl v5.30.1                      2020D-B0I1x-:2:9Class::Helper::ResultSet::OneRow(3)
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