sub _has_one {
my ($class, $join_type, $rel, $f_class, $cond, $attrs) = @_;
eval "require $f_class";
+ if ($@) {
+ $class->throw($@) unless $@ =~ /Can't locate/;
+ }
+
unless (ref $cond) {
my ($pri, $too_many) = $class->primary_columns;
$class->throw( "might_have/has_one can only infer join for a single primary key; ${class} has more" )