Which version of the Avro specification does the latest version of avsc (5.7.7) implement?

[fergalmonaghan]

The Wiki docs here https://github.com/mtth/avsc/wiki currently say:

avsc is a pure JavaScript implementation of the [Avro specification](https://avro.apache.org/docs/current/spec.html) (compliant with the current version, 1.8.1).

However the current latest version of the Avro specification is 1.11.1

Does avsc still only implement Avro 1.8.1, or does it implement a later version that the docs need to be updated to reflect?

[mtth]

Hi @fergalmonaghan. avsc implements 1.8.1 and a subset of newer features (see #238). I haven't kept up with specification updates but I'm open to adding functionality to catch up. To start, it would be helpful to know which new features are most useful.

[francescopessinab52]

Hi @mtth ! A very useful feature, introduced in Avro 1.9.1, would be the possibility to specify an enum default symbol, in order to ensure compatibility.

[francescopessinab52]

Hi @mtth ! A very useful feature, introduced in Avro 1.9.1, would be the possibility to specify an enum default symbol, in order to ensure compatibility.

@mtth hi :) Any news on this? To be more precise, I am using avsc to generate an avro schemas composing different "smaller" schemas.

My problem is that, if I add to the avsc registry a schema an enum default symbol, then then generated schemas which uses the enum I added in the registry won't have it.

For example, if I add to the registry a schema like this:

  {
        "type": "enum",
        "name": "MyEnum",
        "symbols": [
          "a",
          "b",
          "Unknown"
        ],
        /* 
         * Symbol default - for forwards compatibility - 
         * new in Avro 1.9.0
         */
         "default": "Unknown"  
      }

And then I try to generate, using avsc and the registry, the schema for this avro:

{
  "type": "Record",
  "name: "Test",
  "fields": [
    {
      "name": "testEnum",
      "type": "MyEnum",
      "default": "Unknown"
    }
  ]
}

then the resulting schema is like this, without the default symbol:

{
  "type": "Record",
  "name: "Test",
  "fields": [
    {
      "name": "testEnum",
      "type": {
        {
          "type": "enum",
          "name": "MyEnum",
          "symbols": [
            "a",
            "b",
            "Unknown"
          ],
        // here I should expect `"default": "Unknown"`, but it is removed by avsc
        },
     "default": "Unknown"
      }
    }
  ]
}

Do you think you can implement this feature?