1DBIx::Class::Helper::ReUssuelrtSCeotn:t:rOinbeuRtoewdD(B3PI)exr:l:CDloacsusm:e:nHtealtpieorn::ResultSet::OneRow(3)
2
3
4

NAME

6       DBIx::Class::Helper::ResultSet::OneRow - The first you always wanted
7

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';
16
17        __PACKAGE__->load_components('Helper::ResultSet::OneRow');
18
19        sub person_named {
20           $_[0]->search({ name => $_[1] })->one_row
21        }
22

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:
27
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.
39
40       Fundamentally the difference is that when you use "one_row" you are
41       guaranteed to exhaust the underlying cursor.
42
43       Generally speaking, unless you are doing something unusual, "one_row"
44       is a good default.
45

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.
50

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
55

AUTHOR

57       Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>
58
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.
64
65
66
67perl v5.30.1                      2020D-B0I1x-:2:9Class::Helper::ResultSet::OneRow(3)
Impressum