У меня есть следующая модель, соответствующая таблицам базы данных, перечисленным ниже.

Менеджер - это работник. Бухгалтер также является работником.

What is the best method to get all managers in the repository? How to implement GetAllManagers() method? Is it proper TPT?

КОД

MyRepository.MyEmployeeRepository rep = new MyEmployeeRepository();
List<Employee> e = rep.GetAllEmployees();



public class MyEmployeeRepository
{
    private string connectionStringVal;
    public MyEmployeeRepository()
    {
        SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder();
        sqlBuilder.DataSource = ".";
        sqlBuilder.InitialCatalog = "LibraryReservationSystem";
        sqlBuilder.IntegratedSecurity = true;

        // Initialize the EntityConnectionStringBuilder.
        EntityConnectionStringBuilder entityBuilder = new EntityConnectionStringBuilder();
        entityBuilder.Provider = "System.Data.SqlClient";
        entityBuilder.ProviderConnectionString = sqlBuilder.ToString();
        entityBuilder.Metadata = @"res://*/Test.csdl|res://*/Test.ssdl|res://*/Test.msl";

        connectionStringVal = entityBuilder.ToString();


    }


    public List<Employee> GetAllEmployees()
    {

        List<Employee> employees = new List<Employee>();
        using (var context = new MyEntityDataModelEDM.LibraryReservationSystemEntities1(connectionStringVal))
        {
            foreach (MyEntityDataModelEDM.Employee p in context.Employees)
            {
                employees.Add(p);
            }
        }

        return employees;
    }

    public List<Manager> GetAllManagers()
    {

        List<Manager> managers = new List<Manager>();
        using (var context = new MyEntityDataModelEDM.LibraryReservationSystemEntities1(connectionStringVal))
        {


        }

        return managers;
    }



}

EDIT

У этой модели есть недостатки. Следует учитывать следующее:

Employee can be created without any role for him. One employee can have multiple roles.