mongodb - compound unique index using spring data not working - mongodb

Question

I am trying to create unique compound index in mongodb using spring data.
But I see that the index is not created and the duplicate document is created in the DB.
My entity class:
#Document
#Getter
#Setter
#AllArgsConstructor
#NoArgsConstructor
#CompoundIndexes(
#CompoundIndex(name = "daybook_index", def = "{'date' : 1, 'vehicleNumber' : 1}", unique = true)
)
public class Daybook {
private String date;
private String vehicleNumber;
private String unit;
}
I am using repository.insert() method to create the document.
When I see in mongo express I see only one index created on _id and the index defined in the entity class is not created.
Is it a bug in spring data or am I doing something wrong?
P.S.: I tried to delete the collection too before running the application but didn't help.

Answer 1

As of Spring Data MongoDB 3.0, automatic index creation is turned off by default.
To turn it on you might use the proper flag overriding the method from MongoConfigurationSupport:
public class MongoConfiguration extends AbstractMongoClientConfiguration {
.....
#Override
protected boolean autoIndexCreation() {
return true;
}
}
otherwise you might create the index with appropriate instructions.
mongoOperations.indexOps(Daybook.class).ensureIndex(new Index().on("date", Direction.ASC).on("vehicleNumber", Direction.ASC).unique());

Answer 2

As #Saxon mentioned:
Spring Data MongoDB 3.0, automatic index creation is turned off by default.
Instead of adding code, I am able to create the index by adding the spring data configuration in application.properties
spring.data.mongodb.auto-index-creation=true