public async Task <InstructorDto> CreateInstructor([FromBody] InstructorDto instructor)
{
// Make sure the name is unique.
var existing = await mContext.Instructors.SingleOrDefaultAsync(i => i.FirstName == instructor.FirstName &&
i.LastName == instructor.LastName);
if (existing != null)
{
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.Forbidden,
$"Instructor named \"{instructor.FirstName} {instructor.LastName}\" already exists"));
}
mContext.Instructors.Add(new Instructor()
{
FirstName = instructor.FirstName,
LastName = instructor.LastName
});
// Save the changes to the db asynchronously.
int records = await mContext.SaveChangesAsync();
if (records == 1)
{
var loaded = await mContext.Instructors.SingleOrDefaultAsync(i => i.FirstName == instructor.FirstName &&
i.LastName == instructor.LastName);
return(InstructorDto.From(loaded));
}
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.InternalServerError,
"Could not save that instructor"));
}
public async Task <InstructorDto> GetInstructor(int id)
{
// SingleOrDefaultAsync is an async version of SingleOrDefault.
var instructor = await mContext.Instructors.SingleOrDefaultAsync(i => i.Id == id);
if (instructor != null)
{
return(InstructorDto.From(instructor));
}
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.NotFound,
$"Instructor id \"{instructor.Id}\" not found"));
}