schema_registry: Support JSON custom attributes on fields

Signed-off-by: Ben Pope <[email protected]>

src/v/pandaproxy/schema_registry/test/compatibility_avro.cc

@@ -250,3 +250,28 @@ SEASTAR_THREAD_TEST_CASE(test_avro_schema_definition) {
  pps::canonical_schema_definition avro_conversion{valid};
  BOOST_CHECK_EQUAL(expected, avro_conversion);
 }
+
+SEASTAR_THREAD_TEST_CASE(test_avro_schema_definition_custom_attributes) {
+ // https://github.com/redpanda-data/redpanda/issues/7274
+ // custom attributes supported only at field level
+ const auto avro_metadata_schema
+ = pps::sanitize_avro_schema_definition(
+ {R"({"type":"record","name":"foo","ignored_attr":true,"fields":[{"name":"bar","type":"float","extra_attr":true}]})",
+ pps::schema_type::avro})
+ .value();
+ pps::canonical_schema_definition expected{
+ R"({"type":"record","name":"foo","fields":[{"name":"bar","type":"float","extra_attr":true}]})",
+ pps::schema_type::avro};
+ pps::sharded_store s;
+ auto valid = pps::make_avro_schema_definition(
+ s,
+ {pps::subject("s2"),
+ {avro_metadata_schema.raw(), pps::schema_type::avro}})
+ .get();
+ static_assert(
+ std::
+ is_same_v<std::decay_t<decltype(valid)>, pps::avro_schema_definition>,
+ "schema2 is an avro_schema_definition");
+ pps::canonical_schema_definition avro_conversion{valid};
+ BOOST_CHECK_EQUAL(expected, avro_conversion);
+}