Added relation picker dialog

testing/HopFrame.Testing/DatabaseContext.cs

@@ -13,6 +13,7 @@ public class DatabaseContext(DbContextOptions<DatabaseContext> options) : DbCont
 
         modelBuilder.Entity<Post>()
             .HasOne<User>()
-            .WithMany();
+            .WithMany()
+            .OnDelete(DeleteBehavior.Cascade);
     }
 }

testing/HopFrame.Testing/Models/User.cs

@@ -10,4 +10,8 @@ public class User {
     public string? Password { get; set; }
     public string? FirstName { get; set; }
     public string? LastName { get; set; }
+
+    public override string ToString() {
+        return Username;
+    }
 }

testing/HopFrame.Testing/Program.cs

@@ -44,6 +44,10 @@ builder.Services.AddHopFrame(options => {
         context.Table<Post>()
             .Property(p => p.Id)
             .SetDisplayName("ID");
+
+        context.Table<Post>()
+            .Property(p => p.Author)
+            .IsRelation(true);
     });
 });