Spring mongodb get ID of inserted item after Save

This is pretty interesting and thought I would share. I just figured out the solution for this with the help of BatScream comment above:

You would create an object and insert it into your MongoDB:

    Animal animal = new Animal();    animal.setName(name);    animal.setCat(cat);    mongoTemplate.insert(animal);

Your animal class looks like this with getters and settings for all fields:

public class Animal {    @Id    @JsonProperty    private String id;    @JsonProperty    private String name;    @JsonProperty    private String cat;    public String getId() {        return id;    }}

AFTER you have done the insert under mongoTemplate.insert(animal);, you can actually call the method animal.getId() and it will return back the ObjectId that was created.

I had the same problem with @AlanH that animal.getId() is null. And then I just realized my id field had been set as a final field with a wither method. So of course getId() is null since the id field is immutable and the wither method returns a new object with id.

if this is the case: use animal = template.insert(animal).