static async Task FilterRegistrations_Bad(IDac dac)
{
var firstSemesters = await dac.GetRegistrations(it => it.Semester == "1st" && it.Grade == 0);
var secondSemester = await dac.GetRegistrations(it => it.Semester == "2nd" && it.Grade == 0);
Console.WriteLine("Fail students in the 1st semester");
foreach (var item in firstSemesters)
{
var student = await dac.GetStudent(it => it.Id == item.StudentId);
Console.WriteLine(student.Name);
}
Console.WriteLine("Fail students in the 2nd semester");
foreach (var item in secondSemester)
{
var student = await dac.GetStudent(it => it.Id == item.StudentId);
Console.WriteLine(student.Name);
}
}
static async Task ShowRegistrations_Bad(IDac dac)
{
var regs = await dac.GetRegistrations(it => true);
foreach (var reg in regs)
{
var student = await dac.GetStudent(it => it.Id == reg.StudentId);
var subject = await dac.GetSubject(it => it.Id == reg.SubjectId);
var teacher = await dac.GetTeacher(it => it.Id == subject.TeacherId);
Console.WriteLine($"{reg.Id:00}|{subject.Name}, {student.Name}, {teacher.Name}, {reg.Semester}, {reg.Grade}");
}
}