Spring Data MongoDB-如果DbRef字段不存在，则添加到db

Question

I have a little question about spring-data-mongodb:

I have ProductDocument class:

@Document
public @Data class ProductDocument extends DocumentObject {
    private String name;
    private int category;
    private int unit;
    private String description;
    private double price;

    @DBRef
    private ProducerDocument producer;

    private int unitInStock;
    private int status;
    private String city;
}

And suppose that I new the class by setting a new ProducerDocument that is not persisted on db.

When I check the product document from db, it is persisted perfectly:

However, new producer object is not persisted to producer collection. I mean if you check the producer id from producer collection, it returns null.

How can I set spring mongodb that if the value is new, add to the referenced collection too.

Thanks.

Answer 1

Spring Data MongoDB does not cascade operations to referenced objects. Thus there is no configuration option do achieve the desired behaviour. Please see the reference documentation for more information.