[AVRO-3955] [Rust] unable to decode string enum from avro encoded data

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.11.3
• Fix Version/s: 1.12.0, 1.11.4
• Component/s: rust
• Labels: pull-request-available
• Tags: rust
• Flags: Patch
• External issue URL: https://github.com/apache/avro/pull/2785

Language

english

• Assignee: Martin Tzvetanov Grigorov
• Reporter: Florentin
• Created: 04/Mar/24 15:33
• Updated: 04/Mar/24 18:58
• Resolved: 04/Mar/24 18:51

Description

Following the below example, the Rust crate of apache-avro is unable to decode a previously encoded value that contains a string enum.

 

```rust
    #[derive(PartialEq, Eq, Serialize, Deserialize, Debug)]
    pub struct StringEnum

{         pub source: String,     }

    #[test]
    fn avro_xxxx_decode_enum() {
        let schema_content = r#"
{
  "name": "AccessLog",
  "namespace": "com.clevercloud.accesslogs.common.avro",
  "type": "record",
  "fields": [
    {
      "name": "source",
      "type":

{         "type": "enum",         "name": "SourceType",         "items": "string",         "symbols": ["SOZU", "HAPROXY", "HAPROXY_TCP"]       }

    }
  ]
}
"#;

        let schema = crate::Schema::parse_str(schema_content).unwrap();
        let data = StringEnum { source: "SOZU".to_string() };

        // encode into avro
        let value = crate::to_value(&data).unwrap();

        let mut buf = std::io::Cursor::new(crate::to_avro_datum(&schema, value).unwrap());

        // decode from avro
        let value = crate::from_avro_datum(&schema, &mut buf, None).unwrap();

        let decoded_data: StringEnum = crate::from_value(&value).unwrap();
        // :arrow_double_up: throw => Failed to deserialize Avro value into value: Expected a String|Bytes|Fixed|Uuid|Union, but got Enum(0, "SOZU")

        assert_eq!(decoded_data, data);
    }
```

Issue Links

• links to: GitHub Pull Request #2785