One row repeating multiple times in spring boot Jpa .findall() response restfull api

Question

I have an issue when I fetch data from my database with jpaReposeitory from category table which has a foriegn key userId in it. relationship of oneToMany, data is coming almost fine but it repeats itself multiple times. here are some images: categoryServiceImpl

Category Entity

json response

error

Answer 1

It may be due to bidirectional relationship.Try using @JsonBackReference in category class

@ManyToOne(fetch = FetchType.LAZY,optional= false)
@JsonBackReference
private User users;