“No property exists found for type”… When using the QueryDslPredicateExecutor with MongoDB and Spring-Data

Question

I\'m trying to use the QueryDslPredicateExecutor with MongoDB and Spring-Data, but it seems to be choking on the \"exists()\" property.

I\'m using -

Answer 1

I ended up solving this by having my base repository extend and implement the QueryDslPredicateExecutor, rather than the higher level repository.

// Custom repository interface
@NoRepositoryBean
public interface ExtendedMongoRepository extends MongoRepository, QueryDslPredicateExecutor{

  public Page query(Query query, Pageable pageable);

}


// Custom Repository Implementation
public abstract class ExtendedMongoRepositoryImpl extends QueryDslMongoRepository
        implements ExtendedMongoRepository {

    private Class clazz;
    private MongoOperations mongoOperations;
    @SuppressWarnings("unused")
    private MongoEntityInformation metadata;

    public ExtendedMongoRepositoryImpl(MongoEntityInformation metadata, MongoOperations mongoOperations) {
        super(metadata, mongoOperations);
        this.mongoOperations = mongoOperations;
        this.clazz = metadata.getJavaType();
        this.metadata = metadata;
    }

    @Override
    public Page query(Query query, Pageable pageable) {
        List list =  mongoOperations.find(query.with(pageable), clazz);
        return new PageImpl(list, pageable, list.size());
    }
}  

// Entity Repository Interface
public interface TreeRepository extends ExtendedMongoRepository {}