Как сделать подсчет в HQL из 2 таблиц - PullRequest
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Как сделать подсчет в HQL из 2 таблиц

0 голосов
/ 27 апреля 2020

У меня есть следующий запрос, который подсчитывает, нравится или не нравится из таблицы OpinionProduct 

@Query(value = "SELECT new org.computerShop.dto.CommentsDto(m,count(ml), (sum(case when ml = :user then 1 else 0 end) > 0), count(ds), (sum (case  when ds =:user then 1 else 0 end)>0)) " +
        "FROM OpinionProduct m  left join m.likes ml left join m.dislikes ds where m.commentToProduct.id = :productId group by m order by m.id DESC ")
Page<CommentsDto> findAllForProduct(@Param("productId") long productId, Pageable pageable,@Param("user") User user);

Соединения в сущности OpinionProduct: 

@ManyToMany
@JoinTable(
        name = "opinions_likes",
        joinColumns = @JoinColumn(name = "opinion_id"),
        inverseJoinColumns = @JoinColumn(name = "user_id")
)
private Set<User> likes = new HashSet<>();

@ManyToMany
@JoinTable(name = "opinions_dislikes",
            joinColumns = @JoinColumn(name = "opinion_id"),
        inverseJoinColumns = @JoinColumn(name = "user_id")
)
private Set<User> dislikes = new HashSet<>();

Мои комментарииDTO, которые содержат подробности о комментарии: 

private Long id;
private String text;
private Product commentToProduct;
private String advantages;
private String disadvantages;
private Long likes;
private Long dislikes;
private boolean meLiked;
private boolean meDisliked;
private LocalDateTime dateTime;
private short rating;

public CommentsDto(OpinionProduct opinionProduct, Long likes, boolean meLiked, Long dislikes, boolean meDisliked) {
    this.id = opinionProduct.getId();
    this.text = opinionProduct.getText();
    this.advantages = opinionProduct.getAdvantages();
    this.disadvantages = opinionProduct.getDisadvantages();
    this.likes = likes;
    this.meLiked = meLiked;
    this.dateTime = opinionProduct.getDateTime();
    this.rating = opinionProduct.getRating();
    this.commentToProduct = opinionProduct.getCommentToProduct();
    this.dislikes = dislikes;
    this.meDisliked = meDisliked;
}

Получить мнения: 

public OpinionsDto getOpinionForProduct(long productId, int page, User user) {
    Pageable pageable = PageRequest.of(page, 5);
    Page<CommentsDto> products = opinionProductRepo.findAllForProduct(productId,pageable,user);
    return new OpinionsDto(products.toList(), pageable.getPageNumber(), products.getTotalPages(), opinionProductRepo.findAllForProduct(productId).size());
}

Мнения DTO: 

private List<CommentsDto> comments;
private int currentPage;
private int totalPages;
private int commentsCounter;

public OpinionsDto(List<CommentsDto> comments, int currentPage, int totalPages, int commentsCounter) {
    this.comments = comments;
    this.currentPage = currentPage;
    this.totalPages = totalPages;
    this.commentsCounter = commentsCounter;
}

Установить лайки: 

public ResponseEntity<String> setLike(User user, OpinionProduct opinionProduct) {
    Set<User> likes = opinionProduct.getLikes();
    Set<User> dislikes = opinionProduct.getDislikes();
    if(dislikes.contains(user)){
        dislikes.remove(user);
    }
    if(likes.contains(user)){
        likes.remove(user);
    }else{
        likes.add(user);
    }
    opinionProductRepo.save(opinionProduct);
    return new ResponseEntity<>("Ok", HttpStatus.OK);
}

Установить антипатии: 

    public ResponseEntity<String> setDislike(User user, OpinionProduct opinionProduct) {
    Set<User> dislikes = opinionProduct.getDislikes();
    Set<User> likes = opinionProduct.getLikes();
    if(likes.contains(user)){
        likes.remove(user);
    }
    if(dislikes.contains(user)){
        dislikes.remove(user);
    }else{
        dislikes.add(user);
    }
    opinionProductRepo.save(opinionProduct);
    return new ResponseEntity<>("Ok", HttpStatus.OK);
}

Но когда я нажимаю на "кнопка, как", а затем из другой учетной записи на "неприязнь", счет работает неправильно.

Живой пример: https://youtu.be/Lx8bNUCvXG4

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