Foreign key is always null in one to many relation - Spring Boot Data with JPA

Question

I have two entity classes Country and Language having bi-directional one to many relationship.

Below are the entity classes:

Answer 1

You can do it in this way also. Here it doesn't create new objects. In the same object which is parsing it creates the relationship in language objects.

@PostMapping("/country")
public Country postCountryDetails(@RequestBody Country country) {

    if( country.getLanguages().size() > 0 )
    {
        country.getLanguages().stream().forEach( countryItem -> {
            countryItem.setCountry( country );
        } );
    }
    return country;
}