Java&Mongo: get object where field exist

Question

Situation: I have collection with documents, each document contains such fields: \"_id\"(ObjectId), \"userId\"(String), but it also can be field \"files\"(Object).

When

Answer 1

You can construct this Query to get all documents that contains files filed:

Query.query(Criteria.where("files").exists(true))

Answer 2

Another possibility is to use org.springframework.data.mongodb.repository.Query annotation on your method (useful when using MongoRepository):

@Query(value="{ files : { $exists : true } }")