// GET: StudentCourseAssociation/Edit/5
public ActionResult Edit(int id)
{
StudentCourseAssociation studentCourseAssociation = studentCourseAssociationService.Get(id);
StudentCourseAssociationViewModel studentCourseAssociationViewModel = new StudentCourseAssociationViewModel
{
StudentCourseAssociation = studentCourseAssociation,
Students = studentService.GetAll(),
Courses = courseService.GetAll()
};
return(View(studentCourseAssociationViewModel));
}
public async Task RemoveStudentFromCourse(StudentCourseAssociation association)
{
await using var connection =
new NpgsqlConnection(Environment.GetEnvironmentVariable("DATABASE"));
await connection.OpenAsync();
var result = await connection.QueryFirstAsync <Attend>(
"DELETE FROM _attends WHERE student_id = @student AND course_id = @course",
new { student = association.StudentId, course = association.CourseId });
await connection.CloseAsync();
}
public async Task <IActionResult> RemoveStudentFromCourse([FromServices] IAssociationRepository repository,
[FromBody] StudentCourseAssociation association)
{
try
{
await repository.RemoveStudentFromCourse(association);
return(Ok());
}
catch (Exception e)
{
return(BadRequest(e.Message));
}
}
public async Task <IActionResult> AddStudentToCourse([FromServices] IAssociationRepository repository,
[FromBody] StudentCourseAssociation association)
{
try
{
var result = await repository.AddStudentToCourse(association);
return(Ok(result));
}
catch (Exception e)
{
return(BadRequest(e.Message));
}
}
public ActionResult Edit(int id, StudentCourseAssociationViewModel studentCourseAssociationViewModel)
{
StudentCourseAssociation studentCourseAssociation = studentCourseAssociationViewModel.StudentCourseAssociation;
try
{
studentCourseAssociationService.Edit(studentCourseAssociation);
return(RedirectToAction("Index"));
}
catch (Exception ex)
{
return(View(studentCourseAssociationViewModel));
}
}
public ActionResult DeleteConfirmed(int id)
{
StudentCourseAssociation studentCourseAssociation = studentCourseAssociationService.Get(id);
try
{
studentCourseAssociationService.Delete(studentCourseAssociation);
return(RedirectToAction("Index"));
}
catch (Exception ex)
{
return(View(studentCourseAssociation));
}
}
public async Task <Attend> AddStudentToCourse(StudentCourseAssociation association)
{
await using var connection =
new NpgsqlConnection(Environment.GetEnvironmentVariable("DATABASE"));
await connection.OpenAsync();
var result = await connection.QueryFirstAsync <Attend>(
"INSERT INTO _attends(student_id, course_id) VALUES (@student, @course)",
new { student = association.StudentId, course = association.CourseId });
await connection.CloseAsync();
return(result);
}
public async Task RemoveStudentFromCourse(StudentCourseAssociation association)
{
if (await _dbContext.Students.FindAsync(association.StudentId) == null)
{
return;
}
if (await _dbContext.Courses.FindAsync(association.CourseId) == null)
{
return;
}
var result = await _dbContext.Attends.FirstAsync(attend =>
attend.StudentId == association.StudentId && attend.CourseId == association.CourseId);
_dbContext.Entry(result).State = EntityState.Deleted;
await _dbContext.SaveChangesAsync();
}
public async Task <Attend> AddStudentToCourse(StudentCourseAssociation association)
{
if (await _dbContext.Students.FindAsync(association.StudentId) == null)
{
return(null);
}
if (await _dbContext.Courses.FindAsync(association.CourseId) == null)
{
return(null);
}
var result = await _dbContext.Attends.AddAsync(new Attend
{
StudentId = association.StudentId,
CourseId = association.CourseId
});
await _dbContext.SaveChangesAsync();
return(result.Entity);
}
// GET: StudentCourseAssociation/Details/5
public ActionResult Details(int id)
{
StudentCourseAssociation studentCourseAssociation = studentCourseAssociationService.Get(id);
return(View(studentCourseAssociation));
}
