package # hide from PAUSE
DBIx::Class::Relationship::Accessor;
use strict;
use warnings;
use Sub::Name;
use DBIx::Class::Carp;
use DBIx::Class::_Util 'fail_on_internal_wantarray';
use namespace::clean;
our %_pod_inherit_config =
(
class_map => { 'DBIx::Class::Relationship::Accessor' => 'DBIx::Class::Relationship' }
);
sub register_relationship {
my ($class, $rel, $info) = @_;
if (my $acc_type = $info->{attrs}{accessor}) {
$class->add_relationship_accessor($rel => $acc_type);
}
$class->next::method($rel => $info);
}
sub add_relationship_accessor {
my ($class, $rel, $acc_type) = @_;
my %meth;
if ($acc_type eq 'single') {
my $rel_info = $class->relationship_info($rel);
$meth{$rel} = sub {
my $self = shift;
if (@_) {
$self->set_from_related($rel, @_);
return $self->{_relationship_data}{$rel} = $_[0];
} elsif (exists $self->{_relationship_data}{$rel}) {
return $self->{_relationship_data}{$rel};
} else {
my $cond = $self->result_source->_resolve_condition(
$rel_info->{cond}, $rel, $self, $rel
);
if ($rel_info->{attrs}->{undef_on_null_fk}){
return undef unless ref($cond) eq 'HASH';
return undef if grep { not defined $_ } values %$cond;
}
my $val = $self->find_related($rel, {}, {});
return $val unless $val; # $val instead of undef so that null-objects can go through
return $self->{_relationship_data}{$rel} = $val;
}
};
} elsif ($acc_type eq 'filter') {
$class->throw_exception("No such column '$rel' to filter")
unless $class->has_column($rel);
my $f_class = $class->relationship_info($rel)->{class};
$class->inflate_column($rel,
{ inflate => sub {
my ($val, $self) = @_;
return $self->find_or_new_related($rel, {}, {});
},
deflate => sub {
my ($val, $self) = @_;
$self->throw_exception("'$val' isn't a $f_class") unless $val->isa($f_class);
# MASSIVE FIXME - this code assumes we pointed at the PK, but the belongs_to
# helper does not check any of this
# fixup the code a bit to make things saner, but ideally 'filter' needs to
# be deprecated ASAP and removed shortly after
# Not doing so before 0.08250 however, too many things in motion already
my ($pk_col, @rest) = $val->result_source->_pri_cols_or_die;
$self->throw_exception(
"Relationship '$rel' of type 'filter' can not work with a multicolumn primary key on source '$f_class'"
) if @rest;
my $pk_val = $val->get_column($pk_col);
carp_unique (
"Unable to deflate 'filter'-type relationship '$rel' (related object "
. "primary key not retrieved), assuming undef instead"
) if ( ! defined $pk_val and $val->in_storage );
return $pk_val;
}
}
);
} elsif ($acc_type eq 'multi') {
$meth{$rel} = sub {
DBIx::Class::_ENV_::ASSERT_NO_INTERNAL_WANTARRAY and wantarray and my $sog = fail_on_internal_wantarray($_[0]);
shift->search_related($rel, @_)
};
$meth{"${rel}_rs"} = sub { shift->search_related_rs($rel, @_) };
$meth{"add_to_${rel}"} = sub { shift->create_related($rel, @_); };
} else {
$class->throw_exception("No such relationship accessor type '$acc_type'");
}
{
no strict 'refs';
no warnings 'redefine';
foreach my $meth (keys %meth) {
my $name = join '::', $class, $meth;
*$name = subname($name, $meth{$meth});
}
}
}
1;