Shard key not honored in ReferenceLookupDelegate when DocumentReference resolves to a empty collection

[stefanbildl]

Shard key not honored in ReferenceLookupDelegate when DocumentReference resolves to a empty collection

[christophstrobl]

@stefanbildl it's on the list - just not on the top of it.

[stefanbildl]

Here is a hotfix for the problem:

Just use the following ReferenceResolver

    @Bean
    @Override
    public MappingMongoConverter mappingMongoConverter(MongoDatabaseFactory databaseFactory, MongoCustomConversions customConversions, MongoMappingContext mappingContext) {
        DbRefResolver dbRefResolver = new MyReferenceResolver(databaseFactory);
        MappingMongoConverter converter = new MappingMongoConverter(dbRefResolver, mappingContext);
        converter.setCustomConversions(customConversions);
        converter.setCodecRegistryProvider(databaseFactory);
        return converter;
    }



    private class MyReferenceResolver  extends DefaultDbRefResolver {
        public MyReferenceResolver(MongoDatabaseFactory mongoDbFactory) {
            super(mongoDbFactory);
        }

        @Override
        public Object resolveReference(MongoPersistentProperty property, Object source, ReferenceLookupDelegate referenceLookupDelegate, MongoEntityReader entityReader) {
            if(source instanceof DocumentReferenceSource s && s.getTargetSource() instanceof Collection<?> c && c.isEmpty())  {
                return new ArrayList<>();
            }
            return super.resolveReference(property, source, referenceLookupDelegate, entityReader);
        }
    }

[christophstrobl]

Thanks for reaching out and taking the time to provide a PR. We'll have a look.

[stefanbildl]

Hi, any news on this issue?
Thank you.