$self->throw_exception( "No relationship to JOIN from ${from_class} to ${to_class}" )
unless $rel_obj;
my $join = $from_class->storage->sql_maker->_join_condition(
- $from_class->result_source_instance->_resolve_condition(
- $rel_obj->{cond}, $to, $from) );
+ scalar $from_class->result_source_instance->_resolve_condition(
+ $rel_obj->{cond}, $to, $from
+ )
+ );
return $join;
}