/usr/share/perl5/DBIx/Class/ResultClass/HashRefInflator.pm is in libdbix-class-perl 0.082840-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | package DBIx::Class::ResultClass::HashRefInflator;
use strict;
use warnings;
=head1 NAME
DBIx::Class::ResultClass::HashRefInflator - Get raw hashrefs from a resultset
=head1 SYNOPSIS
use DBIx::Class::ResultClass::HashRefInflator;
my $rs = $schema->resultset('CD');
$rs->result_class('DBIx::Class::ResultClass::HashRefInflator');
while (my $hashref = $rs->next) {
...
}
OR as an attribute:
my $rs = $schema->resultset('CD')->search({}, {
result_class => 'DBIx::Class::ResultClass::HashRefInflator',
});
while (my $hashref = $rs->next) {
...
}
=head1 DESCRIPTION
DBIx::Class is faster than older ORMs like Class::DBI but it still isn't
designed primarily for speed. Sometimes you need to quickly retrieve the data
from a massive resultset, while skipping the creation of fancy result objects.
Specifying this class as a C<result_class> for a resultset will change C<< $rs->next >>
to return a plain data hash-ref (or a list of such hash-refs if C<< $rs->all >> is used).
There are two ways of applying this class to a resultset:
=over
=item *
Specify C<< $rs->result_class >> on a specific resultset to affect only that
resultset (and any chained off of it); or
=item *
Specify C<< __PACKAGE__->result_class >> on your source object to force all
uses of that result source to be inflated to hash-refs - this approach is not
recommended.
=back
=cut
##############
# NOTE
#
# Generally people use this to gain as much speed as possible. If a new &mk_hash is
# implemented, it should be benchmarked using the maint/benchmark_hashrefinflator.pl
# script (in addition to passing all tests of course :)
# This coderef is a simple recursive function
# Arguments: ($me, $prefetch, $is_root) from inflate_result() below
my $mk_hash;
$mk_hash = sub {
my $hash = {
# the main hash could be an undef if we are processing a skipped-over join
$_[0] ? %{$_[0]} : (),
# the second arg is a hash of arrays for each prefetched relation
map { $_ => (
# null-branch or not
ref $_[1]->{$_} eq $DBIx::Class::ResultSource::RowParser::Util::null_branch_class
? ref $_[1]->{$_}[0] eq 'ARRAY' ? [] : undef
: ref $_[1]->{$_}[0] eq 'ARRAY'
? [ map { $mk_hash->( @$_ ) || () } @{$_[1]->{$_}} ]
: $mk_hash->( @{$_[1]->{$_}} )
) } ($_[1] ? keys %{$_[1]} : ())
};
($_[2] || keys %$hash) ? $hash : undef;
};
=head1 METHODS
=head2 inflate_result
Inflates the result and prefetched data into a hash-ref (invoked by L<DBIx::Class::ResultSet>)
=cut
##################################################################################
# inflate_result is invoked as:
# HRI->inflate_result ($resultsource_instance, $main_data_hashref, $prefetch_data_hashref)
sub inflate_result {
return $mk_hash->($_[2], $_[3], 'is_root');
}
1;
__END__
=head1 CAVEATS
=over
=item *
This will not work for relationships that have been prefetched. Consider the
following:
my $artist = $artitsts_rs->search({}, {prefetch => 'cds' })->first;
my $cds = $artist->cds;
$cds->result_class('DBIx::Class::ResultClass::HashRefInflator');
my $first = $cds->first;
C<$first> will B<not> be a hashref, it will be a normal CD row since
HashRefInflator only affects resultsets at inflation time, and prefetch causes
relations to be inflated when the master C<$artist> row is inflated.
=item *
Column value inflation, e.g., using modules like
L<DBIx::Class::InflateColumn::DateTime>, is not performed.
The returned hash contains the raw database values.
=back
=head1 FURTHER QUESTIONS?
Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
=head1 COPYRIGHT AND LICENSE
This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
redistribute it and/or modify it under the same terms as the
L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.
|