public async Task <Book> AddBook(BookDTO bookDto)
{
Book newBook = new Book();
newBook.Title = bookDto.Title;
newBook.ISBN = bookDto.ISBN;
newBook.YearReleased = bookDto.YearReleased;
var result = await context.Books.AddAsync(newBook);
context.SaveChanges();
newBook = result.Entity;
if (newBook.Id != 0)
{
if (bookDto.AuthorIds != null && bookDto.AuthorIds.Length > 0)
{
foreach (int aid in bookDto.AuthorIds)
{
BookAuthor ba = new BookAuthor();
ba.AuthorId = aid;
ba.BookId = newBook.Id;
var res = await context.BookAuthors.AddAsync(ba);
await context.SaveChangesAsync();
}
}
await context.SaveChangesAsync();
}
return(newBook);
}
public async Task <Book> UpdateBook(BookDTO bookDto)
{
var book = await context.Books.FirstOrDefaultAsync(e => e.Id == bookDto.Id);
if (book != null)
{
book.Title = bookDto.Title;
book.ISBN = bookDto.ISBN;
book.YearReleased = bookDto.YearReleased;
var result = context.Books.Update(book);
context.SaveChanges();
book = result.Entity;
if (book.Id != 0)
{
if (bookDto.AuthorIds != null && bookDto.AuthorIds.Length > 0)
{
foreach (int aid in bookDto.AuthorIds)
{
// ja tem essx autorx
var ba = book.BookAuthors.FirstOrDefault(ba => ba.AuthorId == aid);
if (ba != null)
{
continue;
}
// novo autor
ba = new BookAuthor();
ba.AuthorId = aid;
ba.BookId = book.Id;
var res = await context.BookAuthors.AddAsync(ba);
}
}
// apagar bookAuthors que nao estejam nesses ids
var outdatedAuthors = book.BookAuthors.Where(ba => bookDto.AuthorIds.Any(id => id != ba.AuthorId));
Console.WriteLine("OUTDATED");
foreach (var ba in outdatedAuthors)
{
Console.WriteLine(ba.Author.Name);
//context.BookAuthors.Remove(ba);
}
await context.SaveChangesAsync();
}
return(book);
}
try
{
await context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
;
}
return(book);
}
public async Task <BookAuthor> AddBookAuthor(BookAuthor bookAuthor)
{
//if (bookAuthor.BookId != 0)
//{
// bookAuthor.Book = await context.Books.FirstOrDefaultAsync(e => e.Id == bookAuthor.BookId);
//}
//if (bookAuthor.AuthorId != 0)
//{
// bookAuthor.Author = await context.Authors.FirstOrDefaultAsync(e => e.Id == bookAuthor.AuthorId);
//}
Console.WriteLine("_____________" + bookAuthor.ToString());
var result = await context.BookAuthors.AddAsync(bookAuthor);
await context.SaveChangesAsync();
return(result.Entity);
}
