{"record":{"id":"d42e90e74444e347","repo":"cayleygraph/cayley","slug":"expected-subject-to-be-an-entity-identifier-but-in","errorCode":null,"errorMessage":"Expected subject to be an entity identifier but instead received: %v","messagePattern":"Expected subject to be an entity identifier but instead received: (.+?)","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"query/linkedql/iter_tags.go","lineNumber":62,"sourceCode":"\t\treturn err\n\t}\n\to, err := jsonld.ToNode(rname)\n\tif err != nil {\n\t\treturn err\n\t}\n\tq := ld.NewQuad(subject, p, o, \"\")\n\tdataset.Graphs[\"@default\"] = append(dataset.Graphs[\"@default\"], q)\n\treturn nil\n}\n\nfunc toSubject(namer refs.Namer, result refs.Ref) (ld.Node, error) {\n\tv, err := namer.NameOf(result)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tid, ok := v.(quad.Identifier)\n\tif !ok {\n\t\treturn nil, fmt.Errorf(\"Expected subject to be an entity identifier but instead received: %v\", v)\n\t}\n\treturn jsonld.ToNode(id)\n}\n\nfunc (it *TagsIterator) addResultsToDataset(dataset *ld.RDFDataset, result refs.Ref) error {\n\ts, err := toSubject(it.ValueIt.Namer, result)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\trefTags := make(map[string]refs.Ref)\n\n\tit.ValueIt.scanner.TagResults(refTags)\n\n\tif len(it.Selected) == 0 {\n\t\tfor tag, ref := range refTags {\n\t\t\tit.addQuadFromRef(dataset, s, tag, ref)\n\t\t}","sourceCodeStart":44,"sourceCodeEnd":80,"githubUrl":"https://github.com/cayleygraph/cayley/blob/81dcd7d73e45136bc0d01802a8ba4685d8a533eb/query/linkedql/iter_tags.go#L44-L80","documentation":"Error \"Expected subject to be an entity identifier but instead received: %v\" thrown in cayleygraph/cayley.","triggerScenarios":"Thrown at query/linkedql/iter_tags.go:62 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"81dcd7d73e45136bc0d01802a8ba4685d8a533eb","analyzedAt":"2026-09-06T06:14:12.358Z","contentChangedAt":"2026-09-06T06:14:12.358Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}