java - 在 Thymeleaf 中，当显示属于一个对象的所有属性时，其中一个属性是其他对象的列表，我该如何显示该列表？

Question

我的对象及其关系:用户有一个主题列表，每个主题都有一个作业列表。我找到了当前登录的用户，并且显示了他们的所有主题以及属于该主题的每个属性，但列表中的分配除外。

我的 Controller :

   @GetMapping("/allSubjects")
public String showSubjects(@ModelAttribute("subject") @Valid UserRegistrationDto userDto, BindingResult result, Model model) {
    Authentication loggedInUser = SecurityContextHolder.getContext().getAuthentication();
    String email = loggedInUser.getName();   

    User user = userRepository.findByEmailAddress(email);

    Subject subject = subjectRepository.findBySubjectName(subjectName);

    model.addAttribute("subjects", user.getSubject());


return "allSubjects";

我的 HTML:

  <div th:each="subject : ${subjects}">
Subject: <h4 th:text="${subject.subjectName}" />
Subject Grade Goal: <h4 th:text="${subject.subjectGradeGoal}" />
CA complete worth: <h4 th:text="${subject.caCompletedWorth}" />
Current Subject Results: <h4 th:text="${subject.subjectResults}" />
Remaining potential marks:<h4 th:text="${subject.maxSubRemMarks}" />
Marks until you reached your goal: <h4 th:text="${subject.marksNeededToReachGoal}" />
Can you still reach your goal?:   <h4 th:text="${subject.isGoalPossible}" />
Your highest possible grade:   <h4 th:text="${subject.highestPossibleGrade}" />

<h4 th:text="${subject.subjectName}" /> <h4> assignments:</h4>
Assignment: <h4 th:text="${subject.assignment}"/>
<!-- The above line of code does not work -->
   </div>   

Answer 1

您应该能够使用 subject.assignment 创建一个嵌套循环:

<div th:each="assignment : ${subject.assignment}">
    Assignment: <h4 th:text="${assignment.name}">[name]</h4>
</div>