how to pass value in thymleaf, checking entity for betting service - spring

Question

creating simple match betting service. I have a problem in thymeleaf with passing the value of the match on which the user is currently betting. I want to pass the ID of the match I am betting on to the bet table. I'm not entirely sure about the entities I have whether they are designed correctly. Currently to the bet table passes me the team that the user is betting on by entering the name on input, I want to pass the match ID as well but without entering.
Bet entity
#Entity
#AllArgsConstructor
#NoArgsConstructor
#Setter
#Getter
#Builder
public class Bet {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
#ManyToOne
#JoinColumn(name = "employee_id")
private Employee employee;
#ManyToOne(cascade = CascadeType.REMOVE)
#JoinColumn(name = "match_id")
private Match match;
#Column(name = "team_bet")
private String teamBet;
private String result;
}
Match entity
#Entity
#AllArgsConstructor
#NoArgsConstructor
#Setter
#Getter
#Builder
public class Match {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
#Column(name = "first_team_name")
private String firstTeamName;
#Column(name = "second_team_name")
private String secondTeamName;
#DateTimeFormat(pattern ="yyyy-MM-dd")
private Date dateOut;
#OneToMany(mappedBy = "match", cascade = CascadeType.ALL, orphanRemoval = true)
private Set<Bet> bet = new HashSet<>();
private String timeOut;
}
Controllers
#GetMapping("/matches/bet/{id}")
public String createBet(Model model, #PathVariable(name = "id") int matchId) throws MatchNotFoundExceptions {
Match match = matchService.getMatch(matchId);
Bet bet = new Bet();
model.addAttribute("match", match);
model.addAttribute("bet", bet);
return "bet_form";
}
#PostMapping("/bet/save")
public String saveBet(Bet bet, RedirectAttributes redirectAttributes) {
betService.createBet(bet);
redirectAttributes.addFlashAttribute("message", "The bet has been created successfully!");
return "redirect:/bets";
}
bet_form.html
<form th:action="#{/bet/save}" method="post"
style="max-width: 700px; margin: 0 auto" th:object="${bet}">
<input type="hidden" th:field="*{id}"/>
<input type="hidden">
<form th:object="${match}">
<!--send to bet entity-->
<td th:text="${id}"></td>
</form>
<div style="text-align: center" class="m-3">
<b>Match Start: </b>
<td th:text="${#dates.format(match.dateOut, 'yyyy-MM-dd')}"></td>
<td th:text="${match.timeOut}"></td>
<div style="text-align: center" class="m-3">
<a th:text="${match.firstTeamName}"></a>
<b>VS</b>
<a th:text="${match.secondTeamName}"></a>
<div class="m-4">
<b>Team Name:</b>
<input type="text" class="form-control"
th:field="*{teamBet}" required minlength="3" maxlength="24"/>
</div>
</div>
</div>
<div class="text-center">
<div class="m-3">
<input type="submit" value="accept" class="btn btn-primary"/>
<input type="submit" value="cancel" class="btn btn-warning"
onclick="location.href='/matches';"/>
</div>
</div>
</form>