评论树，回复回复即可显示

Question

我需要实现评论树，但无法获得回复工作的回复。

Comment.java

...

    @Id

    @GeneratedValue(strategy = GenerationType.IDENTITY)

    private Long id;

    private String content;

    @ManyToOne

    private Post post;

    @ManyToOne

    private Comment parent;

    @OneToMany(mappedBy = "parent")

    private List<Comment> children = new ArrayList<Comment>();

...

PostController.java

model.addAttribute("comments", commentRepository.findAllCommentsByPostIdAndParentIsNull(id));

帖子.html

<th:block th:each="comment : ${comments}">

<p th:text="${comment.content}">comment</p>

<th:block th:each="child : ${comment.children}">

<div class="child">

  <p th:text="${child.content}">comment</p>

</div>

</th:block>

</th:block>

评论数据库

ID | CONTENT | PARENT_ID | POST_ID

1    text1         null        1

2    text2          1          1

3    text3          2          1

4    text4         null        1

我想要的输出

text1

  text2

    text3

text4

我得到的输出

text1

 text2

text4

基本上回复的回复都不会显示。

我该如何获得我想要的输出？

Answer 1

尝试以下方法<th:block th:each="comment : ${comments}">&nbsp; <p th:text="${comment.content}">comment</p>&nbsp; <div th:fragment="f_call(comment)"&nbsp;&nbsp; &nbsp; &nbsp; th:unless="${#lists.isEmpty(comment.children)}" >&nbsp; &nbsp; &nbsp; <div th:each="child : ${comment.children}" th:inline="text">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [[${child.content}]]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <div th:replace="this::f_call(${child})"></div>&nbsp; &nbsp; &nbsp; </div>&nbsp; </div></th:block>