public Author(CatalogEntry book, string authorName, int ordIndex = 0, string role = null) : base(true)
{
Book = book;
FullName = authorName;
OrdIndex = ordIndex;
Role = role;
}
public Genre(CatalogEntry book, string genre) : base(true)
{
Book = book;
Value = genre.HasValue() ? genre.Truncate(50) : throw new ArgumentNullException(nameof(genre));
}
public Identifier(CatalogEntry book, string identifier) : base(true)
{
Book = book;
Value = identifier.HasValue() ? FixValue(identifier) : throw new ArgumentNullException(nameof(identifier));
}
public OwnedBook(int bookNumber, CatalogEntry book) : base(true)
{
BookNumber = bookNumber;
Book = book ?? throw new ArgumentNullException(nameof(book));
IsDeleted = false;
}