春季数据mongodb同一集合中的多个实体

Question

I am in a situation where I have to store data belonging to multiple entities in a single collection. But when I query then back, I dont want unwanted records in my result. How can we achieve this using spring? Below is what I have done so far.

1. I give same collection name in entity as shown below.

@Document(collection = "livingThings")
@Data
public class AnimalEntity {
    //contains id, type, bla, bla
}

@Document(collection = "livingThings")
@Data
public class HumanEntity {
  //contains id, gender, address
}

2. I create independent mongoRepository interfaces

public interface AnimalRepository implements MongoRepository<AnimalEntity, String> {

}

public interface HumanRepository implements MongoRepository<HumanEntity, String> {

}

3. And the problem is

when I do animalRepo.findAll or humanRepo.findAll, I get all records available in the collection.

4. What I expect

animalRepo.findAll returns only those records where document structure is same as AnimalEntity.

Thank you very much for your time and patience to attend this query.

Answer 1

MongoDB automatically adds _class field to entities in a collection. Even though it is not the best solution, you can try this:

@Query("_class:your package name here.AnimalEntity")
public AnimalEntity findAllAnimals();