public IActionResult Detail([FromRoute] int id)
{
if (id == 0)
{
var vm = new BookEditDetailViewModel
{
CreationDate = DateTime.Now
};
return(View("Detail", vm));
}
else
{
var book = _bookService.GetBookById(id);
if (book == null)
{
return(NotFound());
}
var vm = ConvertBookToEditDetailViewModel(book);
vm.Genres = _bookService.GetAllGenres().Select(x => new SelectListItem
{
Text = x.Name,
Value = x.Id.ToString(),
}
).ToList();
return(View(vm));
}
}
public BookEditDetailViewModel ConvertBookToEditDetailViewModel(Book book)
{
var vm = new BookEditDetailViewModel
{
Id = book.Id,
Title = book.Title,
CreationDate = book.CreationDate,
Genre = book.Genre?.Name,
GenreId = book.Genre?.Id
};
return(vm);
}
public IActionResult Persist([FromForm] BookEditDetailViewModel vm)
{
if (ModelState.IsValid)
{
var book = vm.Id == 0 ? new Book() : _bookService.GetBookById(vm.Id);
book.Title = vm.Title;
book.Genre = vm.GenreId.HasValue ? _bookService.GetGenreById(vm.GenreId.Value) : null;
book.CreationDate = vm.CreationDate;
book.ISBN = vm.ISBN;
_bookService.Persist(book);
return(Redirect("/books"));
}
return(View("Detail", vm));
}