public async Task <IActionResult> PutStudent(double id, Student student)
{
if (id != student.Id)
{
return(BadRequest());
}
_context.Entry(student).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!StudentExists(id))
{
return(NotFound());
}
else
{
throw;
}
}
return(NoContent());
}
public async Task <IActionResult> PutTeacher(int id, Teacher teacher)
{
if (id != teacher.Id)
{
return(BadRequest());
}
_context.Entry(teacher).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!TeacherExists(id))
{
return(NotFound());
}
else
{
throw;
}
}
return(NoContent());
}
public async Task <IActionResult> PutCourse([FromRoute] int id, [FromBody] CourseStudentEditViewModel model)
{
if (id != model.Course.Id)
{
return(BadRequest());
}
_context.Entry(model.Course).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
IEnumerable <double> listStudents = model.SelectedStudents;
IQueryable <Enrollment> toBeRemoved = _context.Enrollment.Where(s => !listStudents.Contains(s.StudentId) && s.CourseId == id);
_context.Enrollment.RemoveRange(toBeRemoved);
IEnumerable <double> existStudents = _context.Enrollment.Where(s => listStudents.Contains(s.StudentId) && s.CourseId == id).Select(s => s.StudentId);
IEnumerable <double> newStudents = listStudents.Where(s => !existStudents.Contains(s));
foreach (int studentId in newStudents)
{
_context.Enrollment.Add(new Enrollment {
StudentId = studentId, CourseId = id
});
}
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!CourseExists(id))
{
return(NotFound());
}
else
{
throw;
}
}
return(NoContent());
}