未找到指向 Model 的 EF Core 导航。 在配置之前将导航添加到实体类型

Question

I have two models

public  class PickTaskListAssignment
    {
        [Key]
        public System.Guid PickTaskListAssignmentID { get; set; }
        public Guid PickTaskListAssignmentStatusID { get; set; }
        
        public virtual PickTaskListAssignmentStatus PickTaskListAssignmentStatus { get; set; }
    }

    public class PickTaskListAssignmentStatus
    {
       

        [Key]
        public Guid PickTaskListAssignmentStatusID { get; set; }
        public string Description { get; set; }

        public virtual ICollection<PickTaskListAssignment> PickTaskListAssignment { get; set; }
    }

Both have been added on the db context.

public virtual DbSet<PickTaskListAssignmentStatus> PickTaskListAssignmentStatus { get; set; }
public virtual DbSet<PickTaskListAssignment> PickTaskListAssignment { get; set; }

But everytime I type in do.net ef migrations add picklist

I encounter this error

Navigation '.Models.PickPack.PickTaskListAssignmentStatus (Dictionary<string, object>).PickTaskListAssignment' was not found. Please add the navigation to the entity type before configuring it.

Any ideas?

Answer 1

Like the comment said, for automatic navigation configuration, naming has to match.

When in you do not want to depend on the automatically configured relation, you can also explicitly define the relation in the Database Context. For example, in the OnModelCreating you can specify the following:

 modelBuilder.Entity<PickTaskListAssignment>(entity =>
    {
          
        entity.HasOne(d => d.PickTaskListAssignmentStatus)
            .WithMany(p => p.PickTaskListAssignment)
            .HasForeignKey(d => d.PickTaskListAssignmentStatusID);
     });

For more reference, see EF Core Documentation