public void DeleteStudent([FromBody] StudentDeleteRequest del)
{
var db = new s18915Context();
Student student = db.Student.SingleOrDefault(x => (x.IndexNumber == del.IndexNumber && x.FirstName == del.FirstName && x.LastName == del.LastName));
db.Student.Remove(student);
db.SaveChanges();
}
public void ModifyStudent([FromBody] Student student)
{
var db = new s18915Context();
var s = new Student
{
IndexNumber = student.IndexNumber,
FirstName = student.FirstName,
LastName = student.LastName,
};
db.Attach(s);
db.Entry(s).Property("FirstName").IsModified = true;
db.Entry(s).Property("LastName").IsModified = true;
db.SaveChanges();
}
public Enrollment PostEnrollStudent([FromBody] StudentEnrollmentRequest s)
{
var db = new s18915Context();
// StudentEnrollRequest has fields [Required] - so check for fields done
// check if studies exists
if (!db.Studies.Any(x => x.Name == s.StudiesName))
{
return(null);
}
// check if student's index is unique
if (db.Student.Any(x => x.IndexNumber == s.IndexNumber))
{
return(null);
}
var studies = db.Studies.FirstOrDefault(x => x.Name == s.StudiesName);
var enrollment = db.Enrollment.FirstOrDefault(x => x.Semester == 1 && x.IdStudy == studies.IdStudy);
var id = 0;
// enrollment does not exist
if (enrollment == null)
{
// get the latest one
var maxId = db.Enrollment
.OrderByDescending(x => x.IdEnrollment)
.FirstOrDefault().IdEnrollment;
id = maxId + 1;
db.Enrollment.Add(new Enrollment
{
IdEnrollment = id,
Semester = 1,
IdStudy = studies.IdStudy,
StartDate = DateTime.Now
});
}
if (enrollment != null)
{
id = enrollment.IdEnrollment;
}
db.Student.Add(new Student
{
IndexNumber = s.IndexNumber,
FirstName = s.FirstName,
LastName = s.LastName,
BirthDate = s.BirthDate,
IdEnrollment = id
});
db.SaveChanges();
return(new Enrollment
{
IdEnrollment = id,
Semester = 1,
IdStudy = studies.IdStudy,
StartDate = enrollment == null ? DateTime.Now : enrollment.StartDate
});
}
public Enrollment PostPromoteStudents([FromBody] PromotionRequest p)
{
var db = new s18915Context();
//db.Database.ExecuteSqlRaw("EXEC PromoteStudents", new SqlParameter("name", p.Studies), new SqlParameter("sem", p.Semester));
//return new Enrollment
//{
// Semester = p.Semester + 1,
// IdStudy = db.Studies.OrderByDescending(x => x.IdStudy).FirstOrDefault(x => x.Name == p.Studies).IdStudy
//};
// check for studies
if (!db.Studies.Any(x => x.Name == p.Studies))
{
return(null);
}
var studies = db.Studies.FirstOrDefault(x => x.Name == p.Studies);
// check if enrollment like that exists
if (!db.Enrollment.Any(x => x.Semester == p.Semester && x.IdStudy == studies.IdStudy))
{
return(null);
}
// search for record in enrollment with semester + 1
var nextEnrollment = db.Enrollment.FirstOrDefault(x => x.IdStudy == studies.IdStudy && x.Semester == p.Semester + 1);
int newId = 0;
// insert new enrollment if not found
if (nextEnrollment == null)
{
var maxId = db.Enrollment
.OrderByDescending(x => x.IdStudy)
.FirstOrDefault().IdEnrollment;
newId = maxId + 1;
db.Add(new Enrollment
{
IdEnrollment = maxId + 1,
Semester = p.Semester + 1,
IdStudy = studies.IdStudy,
StartDate = DateTime.Now
});
}
if (nextEnrollment != null)
{
newId = nextEnrollment.IdEnrollment;
}
var toUpdate = db.Student.Where(x => x.IdEnrollment == db.Enrollment.FirstOrDefault(x => x.Semester == p.Semester && x.IdStudy == studies.IdStudy).IdEnrollment);
foreach (var student in toUpdate)
{
student.IdEnrollment = newId;
}
db.SaveChanges();
return(new Enrollment
{
IdEnrollment = newId,
Semester = p.Semester + 1,
IdStudy = studies.IdStudy,
StartDate = nextEnrollment == null ? DateTime.Now : nextEnrollment.StartDate
});
}