{"id":"eb1a6c346c781c0f","repo":"go-redis/redis","slug":"redis-can-t-parse-reply-t-reading-string","errorCode":null,"errorMessage":"redis: can't parse reply=%T reading string","messagePattern":"redis: can't parse reply=%T reading string","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"command.go","lineNumber":8742,"sourceCode":"\t\t}\n\t}\n\treturn &VectorScoreSliceSliceCmd{\n\t\tbaseCmd: cmd.cloneBaseCmd(),\n\t\tval:     val,\n\t}\n}\n\nfunc readVectorAttribStringOrNil(rd *proto.Reader) (*string, error) {\n\tv, err := rd.ReadReply()\n\tif err != nil {\n\t\tif err == proto.Nil {\n\t\t\treturn nil, nil\n\t\t}\n\t\treturn nil, err\n\t}\n\ts, ok := v.(string)\n\tif !ok {\n\t\treturn nil, fmt.Errorf(\"redis: can't parse reply=%T reading string\", v)\n\t}\n\treturn &s, nil\n}\n\ntype VectorAttribSliceCmd struct {\n\tbaseCmd\n\n\tval []VectorAttrib\n}\n\nvar _ Cmder = (*VectorAttribSliceCmd)(nil)\n\nfunc NewVectorAttribSliceCmd(ctx context.Context, args ...any) *VectorAttribSliceCmd {\n\treturn &VectorAttribSliceCmd{\n\t\tbaseCmd: baseCmd{\n\t\t\tctx:  ctx,\n\t\t\targs: args,\n\t\t},","sourceCodeStart":8724,"sourceCodeEnd":8760,"githubUrl":"https://github.com/go-redis/redis/blob/36d97525cd8076aed67cddf54778e9ea84550929/command.go#L8724-L8760","documentation":"Returned by readVectorAttribStringOrNil (command.go:8742) when reading a vector attribute value from the reply that is not a string or nil. The helper calls rd.ReadReply() and expects a bulk string (or nil for missing attributes); receiving any other RESP type (integer, array, error) triggers this. Used internally by all VSIM WITHATTRIBS command reply parsers.","triggerScenarios":"Calling VSimWithArgsWithAttribs or VSimWithArgsWithScoresWithAttribs where the server returns a non-string value in the attribute slot of the reply.","commonSituations":"Server returns attributes as a non-string RESP type (e.g., integer, null-array, or nested structure); VectorSet module version incompatibility; a proxy altering the reply type; server-side bug in attribute serialization.","solutions":["Upgrade Redis and the VectorSet module to a version compatible with this go-redis","Verify that element attributes were properly set via VSETATTR as JSON strings before querying with WITHATTRIBS","Switch to RESP3 (Protocol: 3) to get structured map replies","File a bug report if the server consistently returns non-string attributes for elements that have none set"],"exampleFix":"// before - querying WITHATTRIBS on elements without attributes set\nres, err := rdb.VSimWithArgsWithAttribs(ctx, \"mykey\", vec, &redis.VSimArgs{}).Result()\n\n// after - ensure attributes are set as JSON strings first\nrdb.VSetAttr(ctx, \"mykey\", \"elem\", `{\"category\":\"a\"}`)\nres, err := rdb.VSimWithArgsWithAttribs(ctx, \"mykey\", vec, &redis.VSimArgs{Count: 10}).Result()","handlingStrategy":"try-catch","validationCode":"// Ensure elements have string attributes set via VSETATTR before querying WITHATTRIBS\nok, err := rdb.VSetAttr(ctx, \"mykey\", \"elem\", `{\"cat\":\"a\"}`).Result()\nif err != nil {\n    return err\n}","typeGuard":null,"tryCatchPattern":"res, err := rdb.VSimWithArgsWithAttribs(ctx, key, vec, args).Result()\nif err != nil && strings.Contains(err.Error(), \"can't parse reply\") {\n    log.Error(\"VSIM returned non-string attribute; check server compatibility and element attributes\")\n}","preventionTips":["Set element attributes via VSetAttr as JSON strings before WITHATTRIBS queries","Keep the VectorSet module version in sync with go-redis","Test attribute round-trips after module upgrades"],"tags":["vectorset","vsim","attributes","type-mismatch","parsing"],"analyzedSha":"36d97525cd8076aed67cddf54778e9ea84550929","analyzedAt":"2026-08-06T01:08:27.376Z","schemaVersion":2}