public async Task <IActionResult> PutEnrollment([FromRoute] int id, [FromBody] Enrollment enrollment)
{
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
if (id != enrollment.Id)
{
return(BadRequest());
}
_context.Entry(enrollment).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!EnrollmentExists(id))
{
return(NotFound());
}
else
{
throw;
}
}
return(NoContent());
}
public async Task <IActionResult> Create([Bind("ID,LastName,FirstMidName,EnrollmentDate")] Student student)
{
if (ModelState.IsValid)
{
_context.Add(student);
await _context.SaveChangesAsync(true);
return(RedirectToAction(nameof(Index)));
}
return(View(student));
}
public async Task <Unit> Handle(UpdateDepartmentCommand request, CancellationToken cancellationToken)
{
if (request.DepartmentID == null)
{
throw new NotFoundException(nameof(Department), request.DepartmentID);
}
var departmentToUpdate = await _context.Departments
.Include(i => i.Administrator)
.FirstOrDefaultAsync(m => m.DepartmentID == request.DepartmentID);
if (departmentToUpdate == null)
{
throw new NotFoundException(nameof(Department), request.DepartmentID);
}
departmentToUpdate.Name = request.Name;
departmentToUpdate.Budget = request.Budget;
departmentToUpdate.StartDate = request.StartDate;
departmentToUpdate.InstructorID = request.InstructorID;
_context.Entry <Department>(departmentToUpdate).Property("RowVersion").OriginalValue = request.RowVersion;
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(UpdateInstructorCommand request, CancellationToken cancellationToken)
{
if (request.InstructorID == null)
{
throw new NotFoundException(nameof(Instructor), request.InstructorID);
}
var instructorToUpdate = await _context.Instructors
.Include(i => i.OfficeAssignment)
.Include(i => i.CourseAssignments)
.ThenInclude(i => i.Course)
.FirstOrDefaultAsync(m => m.ID == request.InstructorID);
if (instructorToUpdate == null)
{
throw new NotFoundException(nameof(Instructor), request.InstructorID);
}
instructorToUpdate.LastName = request.LastName;
instructorToUpdate.FirstMidName = request.FirstName;
instructorToUpdate.HireDate = request.HireDate;
if (instructorToUpdate.OfficeAssignment == null)
{
instructorToUpdate.OfficeAssignment = new OfficeAssignment();
}
instructorToUpdate.OfficeAssignment.Location = request.OfficeLocation;
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task<Unit> Handle(DeleteDepartmentCommand request, CancellationToken cancellationToken)
{
var department = await _context.Departments.FindAsync(request.ID);
if (department == null)
throw new NotFoundException(nameof(Department), request.ID);
_context.Departments.Remove(department);
await _context.SaveChangesAsync(cancellationToken);
return Unit.Value;
}
public async Task <Unit> Handle(CreateStudentCommand request, CancellationToken cancellationToken)
{
_context.Students.Add(new Student
{
FirstMidName = request.FirstName,
LastName = request.LastName,
EnrollmentDate = request.EnrollmentDate
});
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(CreateInstructorCommand request, CancellationToken cancellationToken)
{
_context.Instructors.Add(new Instructor
{
FirstMidName = request.FirstName,
LastName = request.LastName,
HireDate = request.HireDate
});
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(CreateDepartmentCommand request, CancellationToken cancellationToken)
{
_context.Departments.Add(new Department
{
Name = request.Name,
Budget = request.Budget,
StartDate = request.StartDate,
InstructorID = request.InstructorID
});
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(DeleteStudentCommand request, CancellationToken cancellationToken)
{
var student = await _context.Students.FindAsync(request.ID);
if (student == null)
{
throw new NotFoundException(nameof(Student), request.ID);
}
_context.Students.Remove(student);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(DeleteCourseCommand request, CancellationToken cancellationToken)
{
var course = await _context.Courses.FindAsync(request.ID);
if (course == null)
{
throw new NotFoundException(nameof(Course), request.ID);
}
_context.Courses.Remove(course);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(CreateCourseCommand request, CancellationToken cancellationToken)
{
var course = new Course
{
CourseID = request.CourseID,
Title = request.Title,
Credits = request.Credits,
DepartmentID = request.DepartmentID
};
_context.Courses.Add(course);
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(UpdateCourseAssignmentsCommand request, CancellationToken cancellationToken)
{
if (request.InstructorID == null)
{
throw new NotFoundException(nameof(Instructor), request.InstructorID);
}
var instructor = await _context.Instructors.Include(x => x.CourseAssignments).Where(x => x.ID == request.InstructorID).FirstOrDefaultAsync();
if (instructor == null)
{
throw new NotFoundException(nameof(Instructor), request.InstructorID);
}
if (request.SelectedCourses == null)
{
instructor.CourseAssignments = new List <Domain.Entities.CourseAssignment>();
}
var selectedCoursesHS = new HashSet <string>(request.SelectedCourses);
var instructorCourses = new HashSet <int>
(instructor.CourseAssignments.Select(c => c.CourseID));
foreach (var course in _context.Courses)
{
if (selectedCoursesHS.Contains(course.CourseID.ToString()))
{
if (!instructorCourses.Contains(course.CourseID))
{
instructor.CourseAssignments.Add(new Domain.Entities.CourseAssignment {
InstructorID = instructor.ID, CourseID = course.CourseID
});
}
}
else
{
if (instructorCourses.Contains(course.CourseID))
{
Domain.Entities.CourseAssignment courseToRemove = instructor.CourseAssignments.FirstOrDefault(i => i.CourseID == course.CourseID);
_context.CourseAssignments.Remove(courseToRemove);
}
}
}
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(UpdateCourseCommand request, CancellationToken cancellationToken)
{
if (request.CourseID == null)
{
throw new NotFoundException(nameof(Course), request.CourseID);
}
var courseToUpdate = await _context.Courses
.FirstOrDefaultAsync(c => c.CourseID == request.CourseID);
courseToUpdate.Title = request.Title;
courseToUpdate.Credits = request.Credits;
courseToUpdate.DepartmentID = request.DepartmentID;
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task <Unit> Handle(UpdateStudentCommand request, CancellationToken cancellationToken)
{
if (request.StudentID == null)
{
throw new NotFoundException(nameof(Student), request.StudentID);
}
var studentToUpdate = await _context.Students
.FirstOrDefaultAsync(s => s.ID == request.StudentID);
studentToUpdate.FirstMidName = request.FirstName;
studentToUpdate.LastName = request.LastName;
studentToUpdate.EnrollmentDate = request.EnrollmentDate;
await _context.SaveChangesAsync(cancellationToken);
return(Unit.Value);
}
public async Task<Unit> Handle(DeleteInstructorCommand request, CancellationToken cancellationToken)
{
var instructor = await _context.Instructors
.Include(i => i.CourseAssignments)
.SingleAsync(i => i.ID == request.ID);
if (instructor == null)
throw new NotFoundException(nameof(Instructor), request.ID);
var departments = await _context.Departments
.Where(d => d.InstructorID == request.ID)
.ToListAsync();
departments.ForEach(d => d.InstructorID = null);
_context.Instructors.Remove(instructor);
await _context.SaveChangesAsync(cancellationToken);
return Unit.Value;
}
private async Task AddEnrollments(Student[] students, Course[] courses)
{
var enrollments = new Enrollment[]
{
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alexander").ID,
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID,
Grade = Grade.A
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alexander").ID,
CourseID = courses.Single(c => c.Title == "Microeconomics").CourseID,
Grade = Grade.C
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alexander").ID,
CourseID = courses.Single(c => c.Title == "Macroeconomics").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alonso").ID,
CourseID = courses.Single(c => c.Title == "Calculus").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alonso").ID,
CourseID = courses.Single(c => c.Title == "Trigonometry").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Alonso").ID,
CourseID = courses.Single(c => c.Title == "Composition").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Anand").ID,
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Anand").ID,
CourseID = courses.Single(c => c.Title == "Microeconomics").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Barzdukas").ID,
CourseID = courses.Single(c => c.Title == "Chemistry").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Li").ID,
CourseID = courses.Single(c => c.Title == "Composition").CourseID,
Grade = Grade.B
},
new Enrollment {
StudentID = students.Single(s => s.LastName == "Justice").ID,
CourseID = courses.Single(c => c.Title == "Literature").CourseID,
Grade = Grade.B
}
};
foreach (Enrollment e in enrollments)
{
var enrollmentInDataBase = _context.Enrollments.Where(
s =>
s.Student.ID == e.StudentID &&
s.Course.CourseID == e.CourseID).SingleOrDefault();
if (enrollmentInDataBase == null)
{
_context.Enrollments.Add(e);
}
}
await _context.SaveChangesAsync();
}
