// objectMetaAndKind retrieves kind and ObjectMeta from a runtime object, or returns an error.
func objectMetaAndKind(typer runtime.ObjectTyper, obj runtime.Object) (*api.ObjectMeta, unversioned.GroupVersionKind, error) {
objectMeta, err := api.ObjectMetaFor(obj)
if err != nil {
return nil, unversioned.GroupVersionKind{}, errors.NewInternalError(err)
}
kind, err := typer.ObjectKind(obj)
if err != nil {
return nil, unversioned.GroupVersionKind{}, errors.NewInternalError(err)
}
return objectMeta, kind, nil
}
// BeforeUpdate ensures that common operations for all resources are performed on update. It only returns
// errors that can be converted to api.Status. It will invoke update validation with the provided existing
// and updated objects.
func BeforeUpdate(strategy RESTUpdateStrategy, ctx api.Context, obj, old runtime.Object) error {
objectMeta, kind, kerr := objectMetaAndKind(strategy, obj)
if kerr != nil {
return kerr
}
if strategy.NamespaceScoped() {
if !api.ValidNamespace(ctx, objectMeta) {
return errors.NewBadRequest("the namespace of the provided object does not match the namespace sent on the request")
}
} else {
objectMeta.Namespace = api.NamespaceNone
}
strategy.PrepareForUpdate(obj, old)
// Ensure some common fields, like UID, are validated for all resources.
errs, err := validateCommonFields(obj, old)
if err != nil {
return errors.NewInternalError(err)
}
errs = append(errs, strategy.ValidateUpdate(ctx, obj, old)...)
if len(errs) > 0 {
return errors.NewInvalid(kind.GroupKind(), objectMeta.Name, errs)
}
strategy.Canonicalize(obj)
return nil
}