/usr/share/perl5/DBIx/Class/CDBICompat/Relationships.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.
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DBIx::Class::CDBICompat::Relationships;
use strict;
use warnings;
use base 'Class::Data::Inheritable';
use Clone;
use DBIx::Class::CDBICompat::Relationship;
use DBIx::Class::_Util qw(quote_sub perlstring);
__PACKAGE__->mk_classdata('__meta_info' => {});
=head1 NAME
DBIx::Class::CDBICompat::Relationships - Emulate has_a(), has_many(), might_have() and meta_info()
=head1 DESCRIPTION
Emulate C<has_a>, C<has_many>, C<might_have> and C<meta_info>.
=cut
sub has_a {
my($self, $col, @rest) = @_;
$self->_declare_has_a($col, @rest);
$self->_mk_inflated_column_accessor($col);
return 1;
}
sub _declare_has_a {
my ($self, $col, $f_class, %args) = @_;
$self->throw_exception( "No such column ${col}" )
unless $self->has_column($col);
$self->ensure_class_loaded($f_class);
my $rel_info;
# Class::DBI allows Non database has_a with implicit deflate and inflate
# Hopefully the following will catch Non-database tables.
if( !$f_class->isa('DBIx::Class::Row') and !$f_class->isa('Class::DBI::Row') ) {
$args{'inflate'} ||= sub { $f_class->new(shift) }; # implicit inflate by calling new
$args{'deflate'} ||= sub { shift() . '' }; # implicit deflate by stringification
}
if ($args{'inflate'} || $args{'deflate'}) { # Non-database has_a
if (!ref $args{'inflate'}) {
my $meth = $args{'inflate'};
$args{'inflate'} = sub { $f_class->$meth(shift); };
}
if (!ref $args{'deflate'}) {
my $meth = $args{'deflate'};
$args{'deflate'} = sub { shift->$meth; };
}
$self->inflate_column($col, \%args);
$rel_info = {
class => $f_class
};
}
else {
$self->belongs_to($col, $f_class);
$rel_info = $self->result_source_instance->relationship_info($col);
}
$rel_info->{args} = \%args;
$self->_extend_meta(
has_a => $col,
$rel_info
);
return 1;
}
sub _mk_inflated_column_accessor {
my($class, $col) = @_;
return $class->mk_group_accessors('inflated_column' => $col);
}
sub has_many {
my ($class, $rel, $f_class, $f_key, $args) = @_;
my @f_method;
if (ref $f_class eq 'ARRAY') {
($f_class, @f_method) = @$f_class;
}
if (ref $f_key eq 'HASH' && !$args) { $args = $f_key; undef $f_key; };
$args ||= {};
my $cascade = delete $args->{cascade} || '';
if (delete $args->{no_cascade_delete} || $cascade eq 'None') {
$args->{cascade_delete} = 0;
}
elsif( $cascade eq 'Delete' ) {
$args->{cascade_delete} = 1;
}
elsif( length $cascade ) {
warn "Unemulated cascade option '$cascade' in $class->has_many($rel => $f_class)";
}
if( !$f_key and !@f_method ) {
$class->ensure_class_loaded($f_class);
my $f_source = $f_class->result_source_instance;
($f_key) = grep { $f_source->relationship_info($_)->{class} eq $class }
$f_source->relationships;
}
$class->next::method($rel, $f_class, $f_key, $args);
my $rel_info = $class->result_source_instance->relationship_info($rel);
$args->{mapping} = \@f_method;
$args->{foreign_key} = $f_key;
$rel_info->{args} = $args;
$class->_extend_meta(
has_many => $rel,
$rel_info
);
if (@f_method) {
quote_sub "${class}::${rel}", sprintf( <<'EOC', perlstring $rel), { '$rf' => \sub { my $o = shift; $o = $o->$_ for @f_method; $o } };
my $rs = shift->search_related( %s => @_);
$rs->{attrs}{record_filter} = $rf;
return (wantarray ? $rs->all : $rs);
EOC
return 1;
}
}
sub might_have {
my ($class, $rel, $f_class, @columns) = @_;
my $ret;
if (ref $columns[0] || !defined $columns[0]) {
$ret = $class->next::method($rel, $f_class, @columns);
} else {
$ret = $class->next::method($rel, $f_class, undef,
{ proxy => \@columns });
}
my $rel_info = $class->result_source_instance->relationship_info($rel);
$rel_info->{args}{import} = \@columns;
$class->_extend_meta(
might_have => $rel,
$rel_info
);
return $ret;
}
sub _extend_meta {
my ($class, $type, $rel, $val) = @_;
my %hash = %{ Clone::clone($class->__meta_info || {}) };
$val->{self_class} = $class;
$val->{type} = $type;
$val->{accessor} = $rel;
$hash{$type}{$rel} = DBIx::Class::CDBICompat::Relationship->new($val);
$class->__meta_info(\%hash);
}
sub meta_info {
my ($class, $type, $rel) = @_;
my $meta = $class->__meta_info;
return $meta unless $type;
my $type_meta = $meta->{$type};
return $type_meta unless $rel;
return $type_meta->{$rel};
}
sub search {
my $self = shift;
my $attrs = {};
if (@_ > 1 && ref $_[$#_] eq 'HASH') {
$attrs = { %{ pop(@_) } };
}
my $where = (@_ ? ((@_ == 1) ? ((ref $_[0] eq "HASH") ? { %{+shift} } : shift)
: {@_})
: undef());
if (ref $where eq 'HASH') {
foreach my $key (keys %$where) { # has_a deflation hack
$where->{$key} = ''.$where->{$key}
if eval { $where->{$key}->isa('DBIx::Class') };
}
}
$self->next::method($where, $attrs);
}
sub new_related {
return shift->search_related(shift)->new_result(shift);
}
=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>.
=cut
1;
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