public List <BookEntity> GetAll()
{
using (var db = new LibraryDataModel())
{
var books = (from b in db.Books
select new BookEntity
{
Id = b.Id,
Isbn = b.Isbn,
LauchDate = b.LauchDate,
Title = b.Title,
Authors = (from a in db.Author
join ab in db.AuthorBook on b.Id equals ab.BookId into abs
from ab in abs.DefaultIfEmpty()
where a.Id == ab.AuthorId
select new AuthorEntity
{
Birthdate = a.Birthdate,
Email = a.Email,
Id = a.Id,
LastName = a.LastName,
Name = a.Name
}).DefaultIfEmpty().ToList()
}).ToList();
return(books);
}
}
public AuthorEntity Get(int id)
{
using (var db = new LibraryDataModel())
{
var author = (from a in db.Author
where a.Id == id
select new AuthorEntity
{
Birthdate = a.Birthdate,
Email = a.Email,
Id = a.Id,
LastName = a.LastName,
Name = a.Name,
Books = (from b in db.Books
join ab in db.AuthorBook on a.Id equals ab.AuthorId into abs
from ab in abs.DefaultIfEmpty()
where b.Id == ab.BookId
select new BookEntity
{
Id = b.Id,
Isbn = b.Isbn,
LauchDate = b.LauchDate,
Title = b.Title
}).DefaultIfEmpty().ToList()
}).SingleOrDefault();
return(author);
}
}
public bool Update(int id, BookEntity entry)
{
var book = MapBook(entry);
using (var db = new LibraryDataModel())
{
db.Books.Attach(book);
db.Entry(entry).State = EntityState.Modified;
return(db.SaveChanges() > 0);
}
}
public bool Update(int id, AuthorEntity entry)
{
var author = MapAuthor(entry);
using (var db = new LibraryDataModel())
{
db.Author.Attach(author);
db.Entry(entry).State = EntityState.Modified;
return(db.SaveChanges() > 0);
}
}
public bool Insert(BookEntity entry)
{
var book = MapBook(entry);
using (var db = new LibraryDataModel())
{
db.Books.Add(book);
var success = db.SaveChanges() > 0;
if (success)
{
entry.Id = book.Id;
}
return(success);
}
}
public bool Delete(int id)
{
using (var db = new LibraryDataModel())
{
var book = db.Books.Find(id);
if (book == null)
{
return(false);
}
var authorBook = (from ab in db.AuthorBook where ab.BookId == id select ab).ToList();
authorBook.ForEach(ab => db.AuthorBook.Remove(ab));
db.Books.Remove(book);
return(db.SaveChanges() > 0);
}
}
public bool Insert(AuthorEntity entry)
{
var author = MapAuthor(entry);
using (var db = new LibraryDataModel())
{
db.Author.Add(author);
var success = db.SaveChanges() > 0;
if (success)
{
entry.Id = author.Id;
}
return(success);
}
}
