In entity framework core, how we can set relationship for a table, when two fields is mapping to primary key of the another table - sql

Question

In entity framework core, how we can set relationship for a table, when two fields is mapping to primary key of the another table.
For example I have two table namely Users & CashBox.
Users Table
Field
Value
UserId
int
UserName
string
CashBox Table
Field
Value
CashBoxId
int
ActivatedBy
int
DeactivatedBy
int
In this case, activatedby & deactivatedby has to be linked with user table. Need to know who activated cashbox & who deactivated cashbox.
Using EF core code first approach.

Answer 1

With the following entity models -
public class User
{
[Key]
public int UserId { get; set; }
public string UserName { get; set; }
}
public class CashBox
{
[Key]
public int CashBoxId { get; set; }
public int ActivatedBy { get; set; }
public int DeactivatedBy { get; set; }
public User ActivatedUser { get; set; }
public User DeactivatedUser { get; set; }
}
you can configure the relationship as -
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<CashBox>(e =>
{
e.HasOne(p => p.ActivatedUser)
.WithMany()
.HasForeignKey(p => p.ActivatedBy);
e.HasOne(p => p.DeactivatedUser)
.WithMany()
.HasForeignKey(p => p.DeactivatedBy);
});
}