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package schema
import (
// Reference validates the ID of a linked resource.
type Reference struct {
Path string
validator FieldValidator
// Compile validates v.Path against rc and stores the a FieldValidator for later use by v.Validate.
func (r *Reference) Compile(rc ReferenceChecker) error {
if rc == nil {
return fmt.Errorf("rc can not be nil")
if v := rc.ReferenceChecker(r.Path); v != nil {
r.validator = v
return nil
return fmt.Errorf("can't find resource '%s'", r.Path)
// Validate validates and sanitizes IDs against the reference path.
func (r Reference) Validate(value interface{}) (interface{}, error) {
if r.validator == nil {
return nil, errors.New("not successfully compiled")
return r.validator.Validate(value)