public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
if ((await _context.Authors.FirstOrDefaultAsync(author =>
author.LastName == LastNameOfAuthor && author.FirstName == FirstNameOfAuthor)) == null)
{
await _context.Authors.AddAsync(new Author()
{
FirstName = FirstNameOfAuthor,
LastName = LastNameOfAuthor
});
await _context.SaveChangesAsync();
}
Book.Author = await _context.Authors.FirstOrDefaultAsync(author =>
author.LastName == LastNameOfAuthor && author.FirstName == FirstNameOfAuthor);
await _context.Books.AddAsync(Book);
await _context.SaveChangesAsync();
LogMessage = $"Book {Book.Title} added to the database.";
return(RedirectToPage("/Catalog"));
}
public async Task <Book> AddAsync(Book newBook)
{
await _context.AddAsync(newBook);
await _context.SaveChangesAsync();
return(newBook);
}
public async Task <Author> AddAsync(Author newAuthor)
{
await _context.Authors.AddAsync(newAuthor);
await _context.SaveChangesAsync();
return(await _context.Authors.FirstOrDefaultAsync(author =>
author.LastName == newAuthor.LastName && author.FirstName == newAuthor.FirstName));
}