[
https://issues.apache.org/jira/browse/AVRO-1912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
John McClean updated AVRO-1912:
-------------------------------
Status: Patch Available (was: Open)
> C++ Resolving Decoding doesn't work if element removed from record in array.
> ----------------------------------------------------------------------------
>
> Key: AVRO-1912
> URL: https://issues.apache.org/jira/browse/AVRO-1912
> Project: Avro
> Issue Type: Bug
> Reporter: John McClean
> Attachments: AVRO-1912.patch
>
>
> Writer schema:
> {code}
> {
> "type": "record",
> "name": "TestRecord",
> "fields": [
> {
> "name": "array",
> "type": {
> "type": "array",
> "items": {
> "name": "item",
> "type": "record",
> "fields": [
> { "name": "A", "type": "string" },
> { "name": "B", "type": "string", "default": "foo" }
> ]
> }
> }
> }
> ]
> }
> {code}
> Reader schema:
> {code}
> {
> "type": "record",
> "name": "TestRecord",
> "fields": [
> {
> "name": "array",
> "type": {
> "type": "array",
> "items": {
> "name": "item",
> "type": "record",
> "fields": [
> { "name": "A", "type": "string" }
> ]
> }
> }
> }
> ]
> }
> {code}
> Data is:
> {code}
> {
> "array": [
> {
> "A": "",
> "B": ""
> }
> ]
> }
> {code}
> The following code fails with an exception “Expected: Repeater got String”.
> The equivalent java code works fine on the same schema and data.
> {code}
> auto decoder = avro::resolvingDecoder(writerSchema,
> readerSchema,
> avro::jsonDecoder(writerSchema));
> strinstream ss = loadData();
> auto_ptr<avro::InputStream> in = avro::istreamInputStream(ss);
> decoder->init(*in);
> auto record = reader::TestRecord();
> decode(*decoder, record);
> {code}
> I stepped through the code and what seems to be happening is that the code is
> treating “A” and “B” as distinct elements in the array, as if the array had
> two elements rather than one.
> I'm not sure how to go about fixing this. Any pointers would be appreciated.
> (I don't think it's my C++ test code. It works fine if the record above isn't
> in an array.)
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