{"record":{"id":"54066d3b7c85297d","repo":"derailed/k9s","slug":"no-describer-for-q-54066d","errorCode":null,"errorMessage":"no describer for %q","messagePattern":"no describer for %q","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/model/tree.go","lineNumber":144,"sourceCode":"func (t *Tree) Empty() bool {\n\treturn t.root.IsLeaf()\n}\n\n// Peek returns model data.\nfunc (t *Tree) Peek() *xray.TreeNode {\n\treturn t.root\n}\n\n// Describe describes a given resource.\nfunc (t *Tree) Describe(ctx context.Context, gvr *client.GVR, path string) (string, error) {\n\tmeta, err := t.getMeta(ctx, gvr)\n\tif err != nil {\n\t\treturn \"\", err\n\t}\n\n\tdesc, ok := meta.DAO.(dao.Describer)\n\tif !ok {\n\t\treturn \"\", fmt.Errorf(\"no describer for %q\", meta.DAO.GVR())\n\t}\n\n\treturn desc.Describe(path)\n}\n\n// ToYAML returns a resource yaml.\nfunc (t *Tree) ToYAML(ctx context.Context, gvr *client.GVR, path string) (string, error) {\n\tmeta, err := t.getMeta(ctx, gvr)\n\tif err != nil {\n\t\treturn \"\", err\n\t}\n\n\tdesc, ok := meta.DAO.(dao.Describer)\n\tif !ok {\n\t\treturn \"\", fmt.Errorf(\"no describer for %q\", meta.DAO.GVR())\n\t}\n\n\treturn desc.ToYAML(path, false)","sourceCodeStart":126,"sourceCodeEnd":162,"githubUrl":"https://github.com/derailed/k9s/blob/2d3ccc6ba2ce98c3781bfc441bb3e884f072774f/internal/model/tree.go#L126-L162","documentation":"Tree.Describe looks up the meta/DAO for a GVR and requires dao.Describer to serve describe text from a tree browser. If the accessor lacks the interface, the tree describe action fails with the offending GVR.","triggerScenarios":"Triggering describe on a tree node whose GVR resolves to an accessor without Describe — custom resources mapped to bare accessors, or tree views configured for resources without describe support.","commonSituations":"Browsing resource graphs/trees (references between objects) and describing a node for an exotic or custom resource; plugins registering DAOs without describe.","solutions":["Describe the same resource from its flat list view, which may route to a different accessor","Ensure the accessor for that GVR implements dao.Describer (embed dao.Resource)","Use kubectl describe <gvr> <name> as an external fallback"],"exampleFix":null,"handlingStrategy":"type-guard","validationCode":null,"typeGuard":"func describerFor(accessor dao.Accessor) (dao.Describer, bool) {\n    d, ok := accessor.(dao.Describer)\n    return d, ok\n}","tryCatchPattern":"out, err := t.Describe(ctx, gvr, path)\nif err != nil && strings.Contains(err.Error(), \"no describer for\") {\n    out, err = kubectlDescribeFallback(gvr, path) // shell out or refuse with a hint\n}\nif err != nil { return \"\", err }","preventionTips":["Validate tree node GVRs against registered accessors when building custom tree views","Keep a capability matrix (GVR -> interfaces) asserted in tests"],"tags":["kubernetes","tree","describer","interface","k9s"],"backgroundTag":null,"analyzedSha":"2d3ccc6ba2ce98c3781bfc441bb3e884f072774f","analyzedAt":"2026-08-15T16:09:14.432Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}