{"record":{"id":"8b6669954945cd35","repo":"quickwit-oss/tantivy","slug":"no-field-type-is-associated-with-code-type-code","errorCode":null,"errorMessage":"No field type is associated with code {type_code:?}","messagePattern":"No field type is associated with code (.+?)","errorType":"exception","errorClass":"DeserializeError","httpStatus":null,"severity":"error","filePath":"src/schema/document/de.rs","lineNumber":400,"sourceCode":"                    type_codes::TOK_STR_EXT_CODE => ValueType::PreTokStr,\n                    _ => {\n                        return Err(DeserializeError::from(io::Error::new(\n                            io::ErrorKind::InvalidData,\n                            format!(\n                                \"No extended field type is associated with code {ext_type_code:?}\"\n                            ),\n                        )))\n                    }\n                }\n            }\n            type_codes::IP_CODE => ValueType::IpAddr,\n            type_codes::NULL_CODE => ValueType::Null,\n            type_codes::ARRAY_CODE => ValueType::Array,\n            type_codes::OBJECT_CODE => ValueType::Object,\n            #[expect(deprecated)]\n            type_codes::JSON_OBJ_CODE => ValueType::JSONObject,\n            _ => {\n                return Err(DeserializeError::from(io::Error::new(\n                    io::ErrorKind::InvalidData,\n                    format!(\"No field type is associated with code {type_code:?}\"),\n                )))\n            }\n        };\n\n        Ok(Self {\n            value_type,\n            reader,\n            doc_store_version,\n        })\n    }\n\n    fn validate_type(&self, expected_type: ValueType) -> Result<(), DeserializeError> {\n        if self.value_type == expected_type {\n            Ok(())\n        } else {\n            Err(DeserializeError::TypeMismatch {","sourceCodeStart":382,"sourceCodeEnd":418,"githubUrl":"https://github.com/quickwit-oss/tantivy/blob/b5d8deb80c26924e6b007a5b1a7630f35ca64de4/src/schema/document/de.rs#L382-L418","documentation":"Value deserialization dispatches on a one-byte type code (str/u64/date/etc.). The catch-all arm converts any unrecognized code into a DeserializeError with this message, because the byte does not map to any known ValueType — the stream is corrupt or written by an incompatible version.","triggerScenarios":"from_reader encountering an unknown type_code byte: data written by a newer tantivy with added ValueTypes, corrupted stored documents, or manual/test serialization emitting invalid codes.","commonSituations":"Reading indexes or JSON-ish snapshots across tantivy versions (forward-compatibility breaks); memory/disk corruption in stored fields; custom tools writing raw Value encodings incorrectly.","solutions":["Upgrade tantivy to match or exceed the version that wrote the data","Restore from backup or re-index the affected documents","If writing bytes manually, use only documented type_codes constants","Verify corruption by checking whether the same document fails consistently"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"match from_reader_result {\n    Err(e) if e.to_string().contains(\"No field type is associated\") => {\n        eprintln!(\"unknown Value type code; check tantivy version/corruption\");\n    }\n    Err(e) => return Err(e),\n    Ok(v) => v,\n}","preventionTips":["Match tantivy versions between writers and readers","Re-index rather than copying stored-field files across major upgrades","Use library serializers for Value, never hand-packed type bytes","Add integrity checks (checksums) for stored documents"],"tags":["deserialization","schema","invalid-data","version-mismatch"],"backgroundTag":"unknown-field-type-code","analyzedSha":"b5d8deb80c26924e6b007a5b1a7630f35ca64de4","analyzedAt":"2026-09-05T13:20:51.521Z","contentChangedAt":"2026-09-05T13:20:51.521Z","schemaVersion":2},"datasetVersion":"2026-09-12T17:17:11.597Z"}