/// <summary>
/// Delete discipline
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public bool DeleteDiscipline(int id)
{
using (var context = new CoursesOfChoiceEntities())
{
var discipline = context.Disciplines.SingleOrDefault(disc => disc.id == id);
if (discipline == null)
{
return(false);
}
else
{
var singleOrDefault = discipline.Group.SingleOrDefault(gr => gr.Deleted == false && gr.Wave == 1);
var groups = discipline.Group.ToList();
foreach (var gr in groups)
{
var sigs = gr.StudentsInGroups;
context.Set <StudentsInGroups>().RemoveRange(sigs);
context.Set <Group>().Remove(gr);
}
context.Set <Disciplines>().Remove(discipline);
context.SaveChanges();
return(true);
}
}
}
public void DeleteStudentInGroups(StudentsInGroups sig)
{
using (var context = new CoursesOfChoiceEntities())
{
var elToRemove = context.Set <StudentsInGroups>().SingleOrDefault(el => el.id == sig.id);
context.Set <StudentsInGroups>().Remove(elToRemove);
deleteAmountStudent(sig.groupID);
context.SaveChanges();
}
}