1 package DBIx::Class::Relationship::BelongsTo;
7 my ($class, $rel, $f_class, $cond, $attrs) = @_;
8 eval "require $f_class";
10 $class->throw($@) unless $@ =~ /Can't locate/;
14 $f_primaries{$_} = 1 for eval { $f_class->primary_columns };
17 # single key relationship
21 $class->throw("Can't infer join condition for ${rel} on ${class}; unable to load ${f_class}") unless $f_loaded;
22 ($pri, $too_many) = keys %f_primaries;
23 $class->throw("Can't infer join condition for ${rel} on ${class}; ${f_class} has no primary keys") unless defined $pri;
24 $class->throw("Can't infer join condition for ${rel} on ${class}; ${f_class} has multiple primary key") if $too_many;
29 my $acc_type = ($class->has_column($rel)) ? 'filter' : 'single';
30 $class->add_relationship($rel, $f_class,
31 { "foreign.${pri}" => "self.${rel}" },
32 { accessor => $acc_type, %{$attrs || {}} }
35 # multiple key relationship
36 elsif (ref $cond eq 'HASH') {
39 if (m/\./) { # Explicit join condition
43 $cond_rel->{"foreign.$_"} = "self.".$cond->{$_};
45 $class->add_relationship($rel, $f_class,
47 { accessor => 'single', %{$attrs || {}} }
51 $class->throw('third argument for belongs_to must be undef, a column name, or a join condition');
58 Alexander Hartmaier <Alexander.Hartmaier@t-systems.at>
60 Matt S. Trout <mst@shadowcatsystems.co.uk>