public static void Initialize(FoolDbContext context) { context.Database.EnsureCreated(); var p1 = new Publisher() { Title = "人教版" }; context.Publishers.Add(p1); var b1 = new Book() { Title = "三年级 - 上", Publisher = p1 }; context.Books.Add(b1); var b2 = new Book() { Title = "三年级 - 下", Publisher = p1 }; context.Books.Add(b2); var p2 = new Publisher() { Title = "外研社" }; context.Publishers.Add(p2); var b3 = new Book() { Title = "五年级 - 上", Publisher = p2 }; context.Books.Add(b3); var b4 = new Book() { Title = "五年级 - 下", Publisher = p2 }; context.Books.Add(b4); var txt = new Text() { Book = b1, Title = "This is a book.", Body = "Hello, world!" }; context.Texts.Add(txt); var sen = new Sentence() { Text = txt, English = "Hello, world!", Chinese = "你好世界!", FileName = "a.avi" }; context.Sentences.Add(sen); context.SaveChanges(); }