How to add user to new record in JHipster

When you have user relation to entity and need to add user to newly created record, follow this way.

Entity is i.e. Order.

In OrderResource.java add:

    @Inject
    private UserRepository UserRepository;

Somewhere at the end add:

 public String getCurrentUserLogin() {
        org.springframework.security.core.context.SecurityContext securityContext = SecurityContextHolder.getContext();
        Authentication authentication = securityContext.getAuthentication();
        String login = null;
        if (authentication != null)
            if (authentication.getPrincipal() instanceof UserDetails)
             login = ((UserDetails) authentication.getPrincipal()).getUsername();
            else if (authentication.getPrincipal() instanceof String)
             login = (String) authentication.getPrincipal();
        
        return login; 

        }

In the POST section, before *OrderRepository.save* add:

     User user=new User();
     user=UserRepository.findOneByLogin(getCurrentUserLogin()).get();
     Order.setUser(user);