public int EnrollStudentInCourse(int studentId, int courseId, Enrollment enrollment)
{
try
{
if (_ctx.Enrollments.Any(e => e.Course.Id == courseId && e.Student.Id == studentId))
{
return 2;
}
_ctx.Database.ExecuteSqlCommand("INSERT INTO Enrollments VALUES (@p0, @p1, @p2)",
enrollment.EnrollmentDate, courseId.ToString(), studentId.ToString());
return 1;
}
catch ( DbEntityValidationException dbex)
{
foreach (var eve in dbex.EntityValidationErrors)
{
string line = string.Format("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:",
eve.Entry.Entity.GetType().Name, eve.Entry.State);
foreach (var ve in eve.ValidationErrors)
{
line = string.Format("- Property: \"{0}\", Error: \"{1}\"",
ve.PropertyName, ve.ErrorMessage);
}
}
return 0;
}
catch (Exception ex)
{
return 0;
}
}
public void Seed()
{
if (_ctx.Courses.Count() > 0)
{
return;
}
try
{
foreach (var subjectName in subjects)
{
var subject = new Subject
{
Name = subjectName
};
_ctx.Subjects.Add(subject);
_ctx.SaveChanges();
}
for (int i = 0; i < tutorNames.Length; i++)
{
var nameGenderMail = SplitValue(tutorNames[i]);
var tutor = new Tutor
{
Email = String.Format("{0}.{1}@{2}", nameGenderMail[0], nameGenderMail[1], nameGenderMail[3]),
UserName = String.Format("{0}{1}", nameGenderMail[0], nameGenderMail[1]),
Password = RandomString(8),
FirstName = nameGenderMail[0],
LastName = nameGenderMail[1],
Gender = ((Gender)Enum.Parse(typeof(Gender), nameGenderMail[2]))
};
_ctx.Tutors.Add(tutor);
var courseSubject = _ctx.Subjects.Where(s => s.Id == i + 1).Single();
foreach (var CourseDataItem in CoursesSeedData.Where(c => c.SubjectID == courseSubject.Id))
{
var course = new Course
{
Name = CourseDataItem.CourseName,
CourseSubject = courseSubject,
CourseTutor = tutor,
Duration = new Random().Next(3, 6),
Description = String.Format("The course will talk in depth about: {0}", CourseDataItem.CourseName)
};
_ctx.Courses.Add(course);
}
}
_ctx.SaveChanges();
for (int i = 0; i < studentNames.Length; i++)
{
var nameGenderMail = SplitValue(studentNames[i]);
var student = new Student()
{
Email = String.Format("{0}.{1}@{2}", nameGenderMail[0], nameGenderMail[1], nameGenderMail[3]),
UserName = String.Format("{0}{1}", nameGenderMail[0], nameGenderMail[1]),
Password = RandomString(8),
FirstName = nameGenderMail[0],
LastName = nameGenderMail[1],
Gender = ((Gender)Enum.Parse(typeof(Gender), nameGenderMail[2])),
DateOfBirth = DateTime.UtcNow.AddDays(-new Random().Next(7000, 8000)),
RegistrationDate = DateTime.UtcNow.AddDays(-new Random().Next(365, 730))
};
_ctx.Students.Add(student);
int maxCoursesId = _ctx.Courses.Max(c => c.Id);
//To enroll in 4 courses randomly
for (int z = 0; z < 4; z++)
{
int randomCourseId = new Random().Next(1, maxCoursesId);
var enrollment = new Enrollment
{
Student = student,
Course = _ctx.Courses.Where(c => c.Id == randomCourseId).Single(),
EnrollmentDate = DateTime.UtcNow.AddDays(-new Random().Next(10, 30))
};
_ctx.Enrollments.Add(enrollment);
}
}
_ctx.SaveChanges();
}
catch (Exception ex)
{
string message = ex.ToString();
throw ex;
}
}
// POST: odata/Enrollments
public async Task<IHttpActionResult> Post(Enrollment enrollment)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
db.Enrollments.Add(enrollment);
await db.SaveChangesAsync();
return Created(enrollment);
}