Итак, у меня есть весеннее веб-приложение, это простая форма для ввода классов, лекторов и т. Д. Теперь мне нужна простая панель поиска для этих классов, которая будет возвращать результаты, соответствующие теме класса.
Это мой код и то, что я сделал до сих пор.
Lecture.java
@Data
@Entity
@Table(name="Lecture")
@NoArgsConstructor
public class Lectureimplements Serializable {
private static final long serialVersionUID = 1L;
@Valid
@OneToOne(targetEntity=Lecturer.class, cascade=CascadeType.ALL)
@JoinTable(
name="Lecture_Lecturer",
joinColumns = @JoinColumn(name = "lecture"),
inverseJoinColumns = @JoinColumn(name = "lecturer"))
private Lecturer lecturer;
@NotEmpty(message = "Subject is empty!")
@Size(min = 2, max = 50, message = "Subject must be from 2 to 50 letters long!")
@Column(name="subject")
private String subject;
@NotEmpty(message = "You haven't entered a short description!")
@Size(min = 2, max = 150, message = "A short description must be from 2 to 150 letters long!")
@Column(name="description")
private String shortDescription;
@NotNull(message = "You haven't picked a lecture type!")
@Column(name="type")
@Enumerated(EnumType.STRING)
private LectureType lectureType;
@Column(name="published")
private Boolean published;
@Id
@Column(name="id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name="creationDate")
private Date creationDate;
public enum LectureType {
PRACTICE, PRESENTATION
}
}
LectureController.java
@Slf4j
@Controller
@RequestMapping
@SessionAttributes({"types", "positions", "lectureList", "published"})
public class LectureController {
@Autowired
LectureRepository lectureR;
@Autowired
LecturerRepository lecturerR;
List<Lecture> lectureList = new ArrayList<>();
@RequestMapping
public String newLecture() {
return "newLecture";
}
@GetMapping("/newLecture")
public String showForm(Model model, Lecture lecture) {
log.info("Filling data to show form.");
model.addAttribute("lecture", new Lecture());
model.addAttribute("types", Lecture.LectureType.values());
model.addAttribute("positions", Lecturer.LecturerPositions.values());
model.addAttribute("published", lecture.getPublished());
return "newLecture";
}
@GetMapping("/allLectures")
public String showLectures() {
return "allLectures";
}
@GetMapping("/resetCounter")
public String /resetCounter(SessionStatus status) {
lectureList.clear();
status.setComplete();
return "redirect:/newLecture";
}
@PostMapping("/novoPredavanje")
public String processForm(@Valid Lecture lecture, Errors errors, Model model) {
log.info("Processing lecture: " + lecture);
if(errors.hasErrors()) {
log.info("Lecture has errors. Ending.");
return "newLecture";
} else {
lectureList.add(lecture);
model.addAttribute("numberOfLectures", lectureList.size());
model.addAttribute("lecture", lecture);
model.addAttribute("published", lecture.getPublished());
model.addAttribute("lectureList", lectureList);
log.info("Lecture successfully saved: " + lecture);
return "output";
}
}
@GetMapping("/lectureSearch")
public String lectureSearch(Model model) {
model.addAttribute("lecture", new Lecture());
return "lectureSearch";
}
@PostMapping("/lectureSearch")
public String lectureSearch(Lecture lecture, Model model, String subject) {
List<Lecture> foundLectures = lectureR.findBySubject(subject);
model.addAttribute("foundLectures", foundLectures);
return "lectureSearch";
}
}
LectureRepository.java
@Repository
public interface LectureRepository extends CrudRepository<Lecture, Long> {
List<Lecture> findBySubject(String subject);
}
lectureSearch.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/extras/spring-security">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" th:href="@{/css/style.css}" >
<link rel="stylesheet" type="text/css" th:href="@{/css/bootstrap.css}" >
<title>Lecture output</title>
</head>
<body>
<img th:src="@{~/images/picture.png}" />
<form action="/resetCounter">
<input type="submit" value="Reset counter" class="btn btn-warning" style="background-color: orange"/>
</form>
<div sec:authorize="isAuthenticated()">
<a th:href="@{/newLecture}" class="btn btn-primary">Enter a new lecture</a>
<a th:href="@{/svaPredavanja}" class="btn btn-primary">All lectures</a>
<a th:href="@{/pretragaPredavanja}" class="btn btn-primary">Lecture search</a>
</div>
<div sec:authorize="isAuthenticated()">
<form method="POST" th:action="@{/logout}">You are logged in as <span sec:authentication="name">User</span>.
<input type="submit" value="Logout" class="btn btn-danger" />
</form>
</div>
<div><h3>Lecture search</h3></div>
<form th:object="${lecture}" method="post">
<div>
<label for="subject">Subject: </label>
<input type="text" name="lectureSearch" th:value="${lectureSearch}">
<input type="submit" value="Search">
</div>
</form>
<table>
<tr>
<th>Subject</th>
<th>Short description</th>
<th>Lecture Type</th>
<th>Lecturer's Name</th>
<th>Lecturer's position</th>
<th>Published</th>
</tr>
<tr th:each="lecture : ${lectureSearch}">
<td><span th:text="${lecture.subject}" >LECTURE.SUBJECT</span></td>
<td><span th:text="${lecture.shortDescription}" >LECTURE.SHORTDESCRIPTION</span></td>
<td><span th:text="${lecture.lectureType}" >LECTURE.LECTURETYPE</span></td>
<td><span th:text="${lecture.lecturer.name}" >LECTURER.NAME</span></td>
<td><span th:text="${lecture.lecturer.lecturerPosition}" >LECTURER.LECTURERPOSITION</span></td>
<td><span th:text="${lecture.published}" >LECTURE.PUBLISHED</span></td>
</tr>
</table>
</body>
</html>
При вводе темы в строку поиска результатов не видно, даже если существует лекция с запрашиваемым предметом.Проверка в отладчике, переменная subject равна нулю даже после того, как пользователь вводит тему, которую он хочет найти.Любая помощь будет оценена.