Enums can't be used as method parameters in Repository

[edudar]

When I have the following classes:

enum Status { A,B }

@Document
class Entity { @Field Status status; }

I can write and read entities from the DB with no issues. However, when I create a function that would search for entities using status, it fails with

com.couchbase.client.core.error.InvalidArgumentException: Unsupported type for JSON value: class Status
	at com.couchbase.client.java.json.JsonValue.coerce(JsonValue.java:94)
	at com.couchbase.client.java.json.JsonArray.add(JsonArray.java:178)
	at org.springframework.data.couchbase.core.query.QueryCriteria.maybeWrapValue(QueryCriteria.java:387)

Looking into the code, I see that QueryCriteria tries to convert Enum using AbstractCouchbaseConverter.convertForWriteIfNeeded. There it first looks converter up in CouchbaseCustomConversions but can't find it as conversions know about their own and parent converters only.

converters.addAll(DateConverters.getConvertersToRegister());
converters.addAll(CouchbaseJsr310Converters.getConvertersToRegister());

defaults.addAll(JodaTimeConverters.getConvertersToRegister());
defaults.addAll(Jsr310Converters.getConvertersToRegister());
defaults.addAll(ThreeTenBackPortConverters.getConvertersToRegister());

However, the actual conversion would be performed, if conversion found, by conversionService which is DefaultConversionService and this guy actually knows how to convert to and from Enum.

Adding custom implementations into CouchbaseCustomConversions solves this but I feel like it should not be necessary considering DefaultConversionService can do this already.

[mikereiche]

Thanks @edudar. I'll look at this when I get a chance.

[mstfymrtc]

Any progress on this? :/

[mikereiche]

It's in 4.2.0

d16bbff

Also - it seems that using .toString() of the enum should work as well.

[mstfymrtc]

It's in 4.2.0

d16bbff

Also - it seems that using .toString() of the enum should work as well.

Yeah, it's a workaround i've used too. Thanks for the contribution <3