fix

MyOffice.DbContext/AppDbContext.cs

@@ -115,6 +115,10 @@ public class AppDbContext : DbContext
 			.HasOne(x => x.Currency)
 			.WithMany(x => x.Rates)
 			.HasForeignKey(x => x.CurrencyId);
+
+		modelBuilder.Entity<Currency>()
+			.HasOne(x => x.CurrentRate)
+			.WithOne(x => x.Currency);
 	}
 
 	private void AccountCreating(ModelBuilder modelBuilder)

MyOffice.DbContext/RepositoryInitializer.cs

@@ -17,9 +17,11 @@ public class RepositoryInitializer
 		ConnectionString = connectionString;
 
 		var db = AppDbContextFactory.Instance.CreateDbContext();
-		db.ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking;
 		db.Database.Migrate();
+		
 		Prefill(db);
+
+		UpdateCurrentRates(db);
 	}
 
 	public static ConnectionConfiguration ConnectionString { get; internal set; } = null!;
@@ -52,4 +54,28 @@ public class RepositoryInitializer
 
 		dbContext.SaveChanges();
 	}
+
+	private static void UpdateCurrentRates(AppDbContext dbContext)
+	{
+		var lastrates = dbContext.CurrencyRates
+			.Include(x => x.Currency)
+			.GroupBy(x => new
+			{
+				x.CurrencyId,
+			}, (key, g) => g.OrderByDescending(x => x.DateTime).First())
+			.ToList();
+
+		var currencies = dbContext.Currencies.ToList();
+		foreach (var currency in currencies)
+		{
+			var rate = lastrates.FirstOrDefault(x => x.CurrencyId == currency.Id);
+			if (rate != null)
+			{
+				//currency.CurrentRateId = rate.Id;
+				dbContext.Attach(currency);
+			}
+		}
+
+		dbContext.SaveChanges();
+	}
 }