Mongo custom repository autowired is null - mongodb

Question

I try to autowire my custom mongo repository (and it seems the constructor is executed) but still the result is null
I've looked at some similar questions
Spring Data Neo4j - #Autowired Repository == null
and
spring data mongo repository is null
but I still don't know how to solve this.
public class TestRepo {
#Autowired
PersonRepository repository;
public void find(String name)
{
System.out.println(repository.findByName(name));
}
}
config
<mongo:repositories base-package="com.yyyy.zzz" />
PersonRepository
public interface PersonRepository extends Repository<Person, BigInteger> {
#Query("{name : ?0}")
public Person findByName(String name);
}
Implementation
public class PersonRepositoryImpl implements PersonRepository{
PersonRepositoryImpl()
{
System.out.println("constructing");
}
public Person findByName(String name) {
...
}
}
if I get the repository bean directly from context it works

Answer 1

Your repository setup looks suspicious. To execute query methods, you don't need to provide an implementation at all. I suspect in your current setup the custom implementation you have in PersonRepositoryImpl "overrides" the query method and thus will be preferred on execution.
If you simply drop your implementation class, Spring Data will automatically execute the query for you on invocation.
Generally speaking, custom implementation classes are only needed for functionality you cannot get through other means (query methods, Querydsl intergration etc.).