我如何获得在 spring boot 中具有角色的所有用户的列表？

Question

I have 3 tables (User(id_user...) - Role(id_role) - users_roles(id_role,id_user) (manytomany)). I want to get the list of all User with Roles .

// Service

public List<User> AllUsers() {
    return loginRepo.findAll();
}

// Controller

@GetMapping("/gestion_utilisateurs")
public String GetAllUsers(Model model) {
    List<User> all_users = loginServ.AllUsers();
    model.addAttribute("all_users", all_users);
    return "administration/identite_patient/gestion_utilisateurs";
}

// View

<th:block th:each="all_users : ${all_users}">
  <tr>
      <td th:style = "${all_users.enabled == true } ? 'color: green' : 'color: red' " > &diams; </td>
      <td th:text="${all_users.nom}"></td>
      <td th:text="${all_users.prenom}"></td>
      <td th:text="${all_users.username}"></td>
      <td th:text="${all_users.roles.role_name}" ></td>
      <td></td>
  </tr>
<th:block>

I want to show role_name but I don't know how to get it (all_users.roles.role_name doesn't work). Please if someone has an idea.

Answer 1

Since you can have multiple roles in a user , you would need to iterate over them jsut like you are doing with all_users to list all users. So something along the following lines:

<th:block th:each="all_users : ${all_users}">
  <tr>
      <td th:style = "${all_users.enabled == true } ? 'color: green' : 'color: red' " > &diams; </td>
      <td th:text="${all_users.nom}"></td>
      <td th:text="${all_users.prenom}"></td>
      <td th:text="${all_users.username}"></td>
      <td th:text="${all_users.roles.role_name}"></td>
      <td th:each="role :${all_users.roles.role_name}">
          <td th:text="${role.role_name}"></td>
      </td>
      <td></td>
  </tr>
<th:block>