# insert a line of code at the start of the initializer,
# clearing the param if it's undefined.
- if (defined $key_name) {
- my $tolerant_code =
- qq# delete \$params->{'$key_name'} unless # .
+ if (defined $key_name)
+ {
+ # leave the value unscathed if the attribute's type constraint can
+ # handle undef (or doesn't have one, which implicitly means it can)
+ my $type_constraint = $self->_attributes->[$_[0]]->type_constraint;
+ if ($type_constraint and not $type_constraint->check(undef))
+ {
+ my $tolerant_code =
+ qq# delete \$params->{'$key_name'} unless # .
qq# exists \$params->{'$key_name'} && defined \$params->{'$key_name'};\n#;
return $tolerant_code . $self->$orig(@_);
+ }
}
- else {
- return $self->$orig(@_);
- }
- });
-}
+
+ return $self->$orig(@_);
+});
no Moose::Role;