findById

Controller

@GetMapping(value = "/{id}")
public PostDTO findById(@PathVariable String id) {
    return postService.findById(id);
}

Service

public PostDTO findById(String id) {
    Post post = postRepository.findById(id)
            .orElseThrow(() -> new ResourceNotFound("Post not found"));
        
    return new PostDTO(post);
}

private Post getEntityById(String id) {
    Optional<Post> post = postRepository.findById(id);
    return post.orElseThrow(() -> new ResourceNotFound("Objeto não encontrado."));
}