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Home/ Questions/Q 9188057
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Editorial Team
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Editorial Team
Asked: June 17, 20262026-06-17T19:55:24+00:00 2026-06-17T19:55:24+00:00

I have this simple model public class Autor { [Key] int AutorID { get;

  • 0

I have this simple model

public class Autor
{
    [Key]
    int AutorID { get; set; }

    [Required]
    [MaxLength(100)]
    public string Nome { get; set; }

    [Required]
    [Display(Name = "Data de nascimento")]
    [DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
    public DateTime Data { get; set; }

    public virtual ICollection<Livro> Livros { get; set; }
}

and

public class Livro
{
    public int LivroID { get; set; }

    [Required(ErrorMessage = "E necessario titulo")]
    [MaxLength(100, ErrorMessage = "Titulo deve ter no maximo 100 caracteres")]
    public string Titulo { get; set; }

    [Required]
    [DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
    public DateTime Data { get; set; }

    [Required]
    [Range(1, 5000, ErrorMessage = "Valor deve ser entre 1 e 5000")]
    public int Paginas { get; set; }

    [Required]
    public int AutorID { get; set; }

    [Required]
    public virtual Autor Autor { get; set;     
  }

Usage:

public class BibliotecaContext : DbContext
{
    public DbSet<Autor> Autores { get; set; }

    public DbSet<Livro> Livros { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        modelBuilder.Entity<Autor>().HasMany(p => p.Livros).WithRequired(p => p.Autor);
    }
}

When i try to create a controller strongly typed for the Livro class I’m getting this:

enter image description here

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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-06-17T19:55:25+00:00Added an answer on June 17, 2026 at 7:55 pm

    I believe it is because the AutorID Property is not public.

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