MongoDB: How to use a custom converter for an embedded property / field

[martin.grotzke]

Hi,

in a project using mongoDB I have a bean with a custom id type that I want to get mapped to a DBObject. I followed the documentation (http://static.springsource.org/sprin.../html/#d0e2654) but the custom Id does not get converted.

This is my bean:

@Document(collection = "products")
public class ProductGroup {

   @Id
   private PortalContentId id;

   public PortalContentId getId() {
      return id;
   }

   public void setId(final PortalContentId id) {
      this.id = id;
   }

}

The converter:

public class PortalContentIdWriteConverter implements Converter<PortalContentId, DBObject> {

   @Override
   public DBObject convert(final PortalContentId source) {
      return BasicDBObjectBuilder.start("cid", source.getContentId()).add("appId", source.getAppId()).get();
   }

}

I have registered this in applicationContext.xml:

	<mongo:mapping-converter id="mongoMappingConverter"
		base-package="com.s24.dataexport"
		db-factory-ref="mongoDbFactory">
		<mongo:custom-converters>
			<mongo:converter><bean class="....PortalContentIdWriteConverter" /></mongo:converter>
		</mongo:custom-converters>
	</mongo:mapping-converter>

	<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
		<constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />
		<constructor-arg ref="mongoMappingConverter" />
	</bean>

When I invoke

mongoTemplate.insert(Arrays.asList(someProductGroup), ProductGroup.class);

the following exception is thrown:

java.lang.IllegalArgumentException: can't serialize class ....PortalContentId
	at org.bson.BSONEncoder._putObjectField(BSONEncoder.java:234)
	at org.bson.BSONEncoder.putObject(BSONEncoder.java:121)
	at org.bson.BSONEncoder.putObject(BSONEncoder.java:86)
	at com.mongodb.OutMessage.putObject(OutMessage.java:190)
	at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:253)
	at com.mongodb.DBApiLayer$MyCollection.insert(DBApiLayer.java:217)
	at com.mongodb.DBCollection.insert(DBCollection.java:102)
	at org.springframework.data.mongodb.core.MongoTemplate$11.doInCollection(MongoTemplate.java:690)
	at org.springframework.data.mongodb.core.MongoTemplate$11.doInCollection(MongoTemplate.java:686)
	at org.springframework.data.mongodb.core.MongoTemplate.execute(MongoTemplate.java:329)
	at org.springframework.data.mongodb.core.MongoTemplate.insertDBObjectList(MongoTemplate.java:686)
	at org.springframework.data.mongodb.core.MongoTemplate.doInsertBatch(MongoTemplate.java:629)
	at org.springframework.data.mongodb.core.MongoTemplate.insert(MongoTemplate.java:578)

Is this simply not (yet) supported, or what is the problem here?

Thanx && cheers,
Martin

[jasonlriley]

I have a similar problem. Did you figure this out? All insight appreciated.
Jason

[martin.grotzke]

Nope, instead I switched to morphia again.

Cheers,
Martin

[Oliver Gierke]

What version did you try this with? Would you mind trying with the latest 1.0 release?