public IActionResult AddGrade(GradeModel model)
{
if (ModelState.IsValid)
{
StudentModel student = StudentManager.GetByNameAndSurname(model.Name, model.Surname).ToModel();
if (student == null)
{
ModelState.AddModelError("pass", "In list of students don't exists student with this name and surname!");
}
else
{
SubjectModel subject = SubjectManager.GetBySubjectName(model.SubjectName).ToModel();
if (subject == null)
{
ModelState.AddModelError("pass", "In list of subjects don't exists subject with this name!");
}
else
{
var grade = GradeManager.GetByGradesInterval1To10().ToList();
if (grade != null)
{
ModelState.AddModelError("pass", "The grade aren't in interval 1 to 10!");
}
else
{
GradeManager.AddNewGrade(model.Name, model.Surname, model.SubjectName, model.Grade, model.Description);
return(RedirectToAction(nameof(GradeIndex)));
}
}
}
}
return(View(model));
}