How to select a single element from an array contained in MongoDB document using Spring Data?
I am new to MongoDB. I have a collection like: [ { "_id":"1", "travels":[ { "_id":"1" }, { "_id":"2" }, { "_id":"3" } ] }, { "_id":"2", "travels":[ { "_id":"4" }, { "_id":"5" }, { "_id":"6" } ] } ]…