public async Task <IActionResult> BookList(int?Id, int?Mb)
{
List <Book> books = await database.Books.Where(book => book.OwnerId == 0 || book.OwnerId == null).ToListAsync();
int UserId = Id ?? 0;
int MaxBooks = Mb ?? 4;
if (books.Count == 0)
{
return(Content("<p>Свободные книги отсутствуют</p>"));
}
List <BookSelectViewModel> booksForSelection = GetBooksForViewModel(books, UserId);
UserBookListViewModel ListForDisplay = new UserBookListViewModel(booksForSelection, MaxBooks);
return(PartialView(ListForDisplay));
}
public async Task <IActionResult> BookList(UserBookListViewModel model)
{
model.MaxBooks += model.BooksForSelection.Count;
if (!TryValidateModel(model))
{
ModelState.AddModelError(String.Empty, "Ошибка создания списка книг или превышено максимальное число книг для данного пользователя");
TempData["BookList_Errors"] = (from item in ModelState.Root.Errors select item.ErrorMessage).ToList();
return(RedirectToAction("Details", new { Id = model.BooksForSelection[0].OwnerId }));
}
else
{
TempData.Remove("BookList_Errors");
}
List <Book> books = new List <Book>(model.BooksForSelection.FindAll(elem => elem.IsSelected == true));
database.UpdateRange(books);
await database.SaveChangesAsync();
return(RedirectToAction("Users"));
}
