"具有继承的 EF Core 错误无效列“鉴别器”"

Question

I'm new to EF Core and sorry if this is a stupid question. I'm getting the Invalid Column "Discriminator" when I try to query

Context.EmployeeAddressNavigation.where(x =>x.Name.Contains("name")).Select(x => new {x.Id,x.employAddress})

Answer 1

When there is inheritance hierarchy in your model you must specify discriminator.Like this

modelBuilder.Entity<Employee>()
            .HasDiscriminator<string>("EmployeeType");

To read more about discriminator,see The Fluent API HasDiscriminator Method

Answer 2

I had the same issue and I thought it was a column named "discriminator" which I dont have. Using [NotMapped] on the child worked.

[NotMapped]
public class EmployeeAddressNavigation : Employee
{
   public EmpoyeeAddress employAddress {get;set;}
}