SpringDataJPA瞬態欄位回傳錯誤值

我有兩個型號：Deck和Word同一個一對多的關系。該Deck模型具有瞬態場showWordsToRevise。我試圖初始化與字的量場List<Words>與statusRepeating == true場。

public class Deck {
    @Id
    @Column(name = "deck_id")
    private Long id;

    @Transient
    private Boolean showWordsToRevise;

    @JsonManagedReference
    @OneToMany(mappedBy = "deck", cascade = CascadeType.ALL)
    private List<Word> words;

    public Boolean getShowWordsToRevise() {
        System.out.println(this.words.stream().map(w -> w.getStatusRepeating()).count()   "  words to revise"   java.time.LocalDateTime.now().toString());
        return this.words.stream().map(w -> w.getStatusRepeating()).count() > 0;
    }

    public void setShowWordsToRevise(Boolean showWordsToRevise) {
        this.showWordsToRevise = showWordsToRevise;
    }
}

和

public class Word {
    @Id
    @Column(name = "word_id")
    private Long id;
    private LocalDate last_checked;
    @Enumerated(EnumType.STRING)
    private WordGroup wordGroup = WordGroup.newUnseen;
    @Transient
    private Boolean statusRepeating = false;
    @ManyToOne
    @JsonBackReference
    @JoinColumn(name="deck_id",referencedColumnName="deck_id")
    private Deck deck;
    

    public Boolean getStatusRepeating() {
        if (this.wordGroup == WordGroup.first && Period.between(this.last_checked,LocalDate.now()).getDays() > 1) return true;
        if (this.wordGroup == WordGroup.second && Period.between(this.last_checked,LocalDate.now()).getDays() > 2) return true;
        return this.wordGroup == WordGroup.third && Period.between(this.last_checked, LocalDate.now()).getDays() > 7;
    }
    public void setStatusRepeating(Boolean statusRepeating) {
        this.statusRepeating = statusRepeating;
    }
}

問題是，當有沒有的話List<Words> 用statusRepeating == true在showWordsToRevise中Word仍然回傳true。

JSON

Hibernate 為同一個請求記錄兩次，首先列印錯誤的數字，然后列印正確的數字。更新它在第二次列印時顯示 0 因為沒有單詞List<Words>

Hibernate: 
    select
        words0_.deck_id as deck_id8_3_0_,
        words0_.word_id as word_id1_3_0_,
        words0_.word_id as word_id1_3_1_,
        words0_.body as body2_3_1_,
        words0_.deck_id as deck_id8_3_1_,
        words0_.definition as definiti3_3_1_,
        words0_.example as example4_3_1_,
        words0_.last_checked as last_che5_3_1_,
        words0_.transcription as transcri6_3_1_,
        words0_.word_group as word_gro7_3_1_ 
    from
        word words0_ 
    where
        words0_.deck_id=?
1  words to revise2021-10-07T10:28:30.059128400
Hibernate: 
    select
        words0_.deck_id as deck_id8_3_0_,
        words0_.word_id as word_id1_3_0_,
        words0_.word_id as word_id1_3_1_,
        words0_.body as body2_3_1_,
        words0_.deck_id as deck_id8_3_1_,
        words0_.definition as definiti3_3_1_,
        words0_.example as example4_3_1_,
        words0_.last_checked as last_che5_3_1_,
        words0_.transcription as transcri6_3_1_,
        words0_.word_group as word_gro7_3_1_ 
    from
        word words0_ 
    where
        words0_.deck_id=?
0  words to revise2021-10-07T10:28:30.060126900

uj5u.com熱心網友回復：

您需要更新您的Deck課程并更改getShowWordsToRevise()方法，以便您計算具有statusRepeating == true以下內容的單詞：

public class Deck {
    @Id
    @Column(name = "deck_id")
    private Long id;

    @Transient
    private Boolean showWordsToRevise;

    @JsonManagedReference
    @OneToMany(mappedBy = "deck", cascade = CascadeType.ALL)
    private List<Word> words;

    public Boolean getShowWordsToRevise() {
        long wordsToReviseCount = this.words.stream().filter(WordLadder::getStatusRepeating).count();
        System.out.println(wordsToReviseCount   " words to revise "   java.time.LocalDateTime.now());
        return wordsToReviseCount > 0;
    }

    public void setShowWordsToRevise(Boolean showWordsToRevise) {
        this.showWordsToRevise = showWordsToRevise;
    }
}

標籤：弹簧靴 jpa

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