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Ensure non-nil items in lists

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This commit is contained in:
Wojciech Tyczyński 2022-01-14 10:14:17 +01:00
parent 1e0b9c6e20
commit 8c1e8355f8
3 changed files with 5 additions and 46 deletions
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6
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/patch.go
View File

@ -236,12 +236,6 @@ func PatchResource(r rest.Patcher, scope *RequestScope, admit admission.Interfac
}
trace.Step("Object stored in database")
if err := setObjectSelfLink(ctx, result, req, scope.Namer); err != nil {
scope.err(err, w, req)
return
}
trace.Step("Self-link added")
status := http.StatusOK
if wasCreated {
status = http.StatusCreated

2
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/response.go
View File

@ -59,7 +59,7 @@ func doTransformObject(ctx context.Context, obj runtime.Object, opts interface{}
if _, ok := obj.(*metav1.Status); ok {
return obj, nil
}
if err := setObjectSelfLink(ctx, obj, req, scope.Namer); err != nil {
if err := ensureNonNilItems(obj); err != nil {
return nil, err
}

43
staging/src/k8s.io/apiserver/pkg/endpoints/handlers/rest.go
View File

@ -356,49 +356,14 @@ func dedupOwnerReferencesAndAddWarning(obj runtime.Object, requestContext contex
}
}
// setObjectSelfLink sets the self link of an object as needed.
// TODO: remove the need for the namer LinkSetters by requiring objects implement either Object or List
// interfaces
func setObjectSelfLink(ctx context.Context, obj runtime.Object, req *http.Request, namer ScopeNamer) error {
if utilfeature.DefaultFeatureGate.Enabled(features.RemoveSelfLink) {
// Ensure that for empty lists we don't return <nil> items.
if meta.IsListType(obj) && meta.LenList(obj) == 0 {
if err := meta.SetList(obj, []runtime.Object{}); err != nil {
return err
}
}
return nil
}
// We only generate list links on objects that implement ListInterface - historically we duck typed this
// check via reflection, but as we move away from reflection we require that you not only carry Items but
// ListMeta into order to be identified as a list.
if !meta.IsListType(obj) {
_, ok := request.RequestInfoFrom(ctx)
if !ok {
return fmt.Errorf("missing requestInfo")
}
return nil
}
_, ok := request.RequestInfoFrom(ctx)
if !ok {
return fmt.Errorf("missing requestInfo")
}
count := 0
err := meta.EachListItem(obj, func(obj runtime.Object) error {
count++
return nil
})
if count == 0 {
// ensureNonNilItems ensures that for empty lists we don't return <nil> items.
func ensureNonNilItems(obj runtime.Object) error {
if meta.IsListType(obj) && meta.LenList(obj) == 0 {
if err := meta.SetList(obj, []runtime.Object{}); err != nil {
return err
}
}
return err
return nil
}
func summarizeData(data []byte, maxLength int) string {