指定的 EntityFramework 架构无效。 错误：

Question

Order Model

public partial class Orden
    {
        public Orden()
        {
            this.Orden_Bitacora = new HashSet<Orden_Bitacora>();
        }    
        //Attributes list    
        public virtual ICollection<Orden_Bitacora> Orden_Bitacora { get; set; }
    }

Orden_Bitacora Model

public partial class Orden_Bitacora
    {
        public int IdBitacora { get; set; }
        public int IdOrden { get; set; }

        public virtual Orden Orden { get; set; }
    }

But when I try to create a Order always display me the message:

Schema specified is not valid. Errors:

The relationship 'OrdenexTModel.FK_Orden_Bitacora_Orden' was not loaded because the type 'OrdenexTModel.Orden' is not available.

Its something wrong with the model declaration?

The relationship 'OrdenexTModel.FK_Orden_Bitacora_Orden' was not loaded because the type 'OrdenexTModel.Orden' is not available.

Answer 1

It cant find a Primary Key on Ordan and therefore the FK relationship will not work. Add the PK to Orden

public partial class Orden
{
    public int OrdenId { get; set; }
    public Orden()
    {
        this.Orden_Bitacora = new HashSet<Orden_Bitacora>();
    }    
    //Attributes list    
    public virtual ICollection<Orden_Bitacora> Orden_Bitacora { get; set; }
}

and you may need to add [Key] attribute to your Orden_Bitacora PK as it doesnt follow the Entity Framework naming convention

[Key]  
public int IdBitacora { get; set; }

or

public int Orden_BitacoraId

Hope that helps

Answer 2

转到 EntityFramework .edmx 文件，该文件将打开一个实体框架，右键单击并选择从数据库更新模型，选择 oky 它将在数据库中进行更改时进行更新。