sub belongs_to {
my ($class, $rel, $f_class, $cond, $attrs) = @_;
eval "require $f_class";
- my %f_primaries = eval { %{ $f_class->_primaries } };
+ if ($@) {
+ $class->throw($@) unless $@ =~ /Can't locate/;
+ }
+
+ my %f_primaries;
+ $f_primaries{$_} = 1 for eval { $f_class->primary_columns };
my $f_loaded = !$@;
+
# single key relationship
- if (not defined $cond) {
- $class->throw("Can't infer join condition for ${rel} on ${class}; unable to load ${f_class}") unless $f_loaded;
- my ($pri, $too_many) = keys %f_primaries;
- $class->throw("Can't infer join condition for ${rel} on ${class}; ${f_class} has multiple primary key") if $too_many;
- my $acc_type = ($class->_columns->{$rel}) ? 'filter' : 'single';
+ if (!ref $cond) {
+ my ($pri,$too_many);
+ if (!defined $cond) {
+ $class->throw("Can't infer join condition for ${rel} on ${class}; unable to load ${f_class}") unless $f_loaded;
+ ($pri, $too_many) = keys %f_primaries;
+ $class->throw("Can't infer join condition for ${rel} on ${class}; ${f_class} has no primary keys") unless defined $pri;
+ $class->throw("Can't infer join condition for ${rel} on ${class}; ${f_class} has multiple primary key") if $too_many;
+ }
+ else {
+ $pri = $cond;
+ }
+ my $acc_type = ($class->has_column($rel)) ? 'filter' : 'single';
$class->add_relationship($rel, $f_class,
{ "foreign.${pri}" => "self.${rel}" },
{ accessor => $acc_type, %{$attrs || {}} }
);
}
# multiple key relationship
- else {
+ elsif (ref $cond eq 'HASH') {
my $cond_rel;
for (keys %$cond) {
if (m/\./) { # Explicit join condition
{ accessor => 'single', %{$attrs || {}} }
);
}
+ else {
+ $class->throw('third argument for belongs_to must be undef, a column name, or a join condition');
+ }
return 1;
}