# no join condition or just a column name
if (!ref $cond) {
- $class->ensure_class_loaded($f_class);
-
- my $pri = $f_class->result_source_instance->_single_pri_col_or_die;
my ($f_key, $guess);
if (defined $cond and length $cond) {
"No such column '$f_key' declared yet on ${class} ($guess)"
) unless $class->has_column($f_key);
+ $class->ensure_class_loaded($f_class);
+ my $f_rsrc = try {
+ $f_class->result_source_instance;
+ }
+ catch {
+ $class->throw_exception(
+ "Foreign class '$f_class' does not seem to be a Result class "
+ . "(or it simply did not load entirely due to a circular relation chain)"
+ );
+ };
+
+ my $pri = $f_rsrc->_single_pri_col_or_die;
+
$cond = { "foreign.${pri}" => "self.${f_key}" };
}