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https://issues.apache.org/jira/browse/AVRO-3177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Theodore updated AVRO-3177:
---------------------------
Description:
Hi!
I'm trying to convert a record that conforms to this schema:
{code:java}
const SCHEMA: &str = r#"
{
"type" : "record",
"name" : "TestName123",
"namespace" : "Microsoft.ServiceBus.Messaging",
"fields" : [ {
"name": "test_field_name",
"type" : { "type": "map", "values": [ "long", "double", "string", "bytes" ] }
}]
}
"#; {code}
to a Rust type defined like this:
{code:java}
pub struct TestName123 {
pub test_field_name: HashMap<String, ???>
}
{code}
using this code:
{code:java}
// `record` is an Avro `Value` type, specifically a `Value::Record`.
avro_rs::from_value::<TestName123>(record)
{code}
I can't seem to figure out the type for `test_field_name` map values. I just
wanted to confirm that doing this is at least possible, and if it is if anyone
would have any general pointers on the type.
I can't find any similar examples in the documentation. I have tried things
like this:
{code:java}
#[derive(Clone, Debug, Deserialize)]
pub enum MapValue {
MapValueLong(u64),
MapValueDouble(f64),
MapValueString(String),
MapValueBytes(Bytes)
}
{code}
But `from_value` fails with an error message `"unsupported union"`.
was:
Hi!
I'm trying to convert a record that conforms to this schema:
{code:java}
const SCHEMA: &str = r#"
{
"type" : "record",
"name" : "TestName123",
"namespace" : "Microsoft.ServiceBus.Messaging",
"fields" : [ {
"name": "test_field_name",
"type" : { "type": "map", "values": [ "long", "double", "string", "bytes" ] }
}]
}
"#; {code}
to a Rust type defined like this:
{code:java}
pub struct TestName123 {
pub test_field_name: HashMap<String, ???>
}
{code}
using this code:
{code:java}
// `record` is an Avro `Value` type, specifically a `Value::Record`.
avro_rs::from_value::<TestName123>(record)
{code}
I can't seem to figure out the type for `test_field_name` map values. I just
wanted to confirm that doing this is at least possible, and if it is if anyone
would have any general pointers on the type.
I can't find any similar examples in the documentation. I have tried things
like this:
{code:java}
#[derive(Clone, Debug, Deserialize)]
pub enum MapValue {
MapValueLong(u64),
MapValueDouble(f64),
MapValueString(String),
MapValueBytes(Bytes)
}
{code}
> Deserializing a HashMap with different possible value types
> -----------------------------------------------------------
>
> Key: AVRO-3177
> URL: https://issues.apache.org/jira/browse/AVRO-3177
> Project: Apache Avro
> Issue Type: Wish
> Components: rust
> Reporter: Theodore
> Priority: Major
>
> Hi!
> I'm trying to convert a record that conforms to this schema:
> {code:java}
> const SCHEMA: &str = r#"
> {
> "type" : "record",
> "name" : "TestName123",
> "namespace" : "Microsoft.ServiceBus.Messaging",
> "fields" : [ {
> "name": "test_field_name",
> "type" : { "type": "map", "values": [ "long", "double", "string", "bytes" ] }
> }]
> }
> "#; {code}
> to a Rust type defined like this:
> {code:java}
> pub struct TestName123 {
> pub test_field_name: HashMap<String, ???>
> }
> {code}
> using this code:
> {code:java}
> // `record` is an Avro `Value` type, specifically a `Value::Record`.
> avro_rs::from_value::<TestName123>(record)
> {code}
> I can't seem to figure out the type for `test_field_name` map values. I just
> wanted to confirm that doing this is at least possible, and if it is if
> anyone would have any general pointers on the type.
> I can't find any similar examples in the documentation. I have tried things
> like this:
>
> {code:java}
> #[derive(Clone, Debug, Deserialize)]
> pub enum MapValue {
> MapValueLong(u64),
> MapValueDouble(f64),
> MapValueString(String),
> MapValueBytes(Bytes)
> }
> {code}
> But `from_value` fails with an error message `"unsupported union"`.
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