Activities of "joffies"

Thanks, that was exactly it.

I haven't tried adding the Entity Framework to my core project yet so was confused at the time in the early hours of the morning :D .

Following your advice by not referencing the EF in the Core project and adding the indexes using OnModelCreating in my DBContext class as follows.

modelBuilder.Entity<Person>().Property(e => e.OrganizationUnitId)
              .HasColumnAnnotation(
                    IndexAnnotation.AnnotationName,
                    new IndexAnnotation(new IndexAttribute("IX_ShareSource_OUId_NationalId") { IsUnique = true, Order = 1})
              );
            modelBuilder.Entity<Person>().Property(e => e.NationalId)
             .HasColumnAnnotation(
                   IndexAnnotation.AnnotationName,
                   new IndexAnnotation(new IndexAttribute("IX_ShareSource_OUId_NationalId") { IsUnique = true, Order =2 })
             );

I then add a migration which is where something funny is happening. The new migration has entries for allot of other tables.

public partial class Create_Indexes_For_Person_Table : DbMigration
    {
        public override void Up()
        {
            DropIndex("dbo.AbpBackgroundJobs", new[] { "IsAbandoned", "NextTryTime" });
            DropIndex("dbo.AbpNotificationSubscriptions", new[] { "NotificationName", "EntityTypeName", "EntityId", "UserId" });
            DropIndex("dbo.SPMShareSources", new[] { "OrganizationUnitId" });
            DropIndex("dbo.AbpUserLoginAttempts", new[] { "UserId", "TenantId" });
            DropIndex("dbo.AbpUserLoginAttempts", new[] { "TenancyName", "UserNameOrEmailAddress", "Result" });
            DropIndex("dbo.AbpUserNotifications", new[] { "UserId", "State", "CreationTime" });
            AlterTableAnnotations(
                "dbo.AbpAuditLogs",
                c => new
                    {
                        Id = c.Long(nullable: false, identity: true),
                        TenantId = c.Int(),
                        UserId = c.Long(),
                        ServiceName = c.String(maxLength: 256),
                        MethodName = c.String(maxLength: 256),
                        Parameters = c.String(maxLength: 1024),
                        ExecutionTime = c.DateTime(nullable: false),
                        ExecutionDuration = c.Int(nullable: false),
                        ClientIpAddress = c.String(maxLength: 64),
                        ClientName = c.String(maxLength: 128),
                        BrowserInfo = c.String(maxLength: 256),
                        Exception = c.String(maxLength: 2000),
                        ImpersonatorUserId = c.Long(),
                        ImpersonatorTenantId = c.Int(),
                        CustomData = c.String(maxLength: 2000),
                    },
                annotations: new Dictionary<string, AnnotationValues>
                {
                    { 
                        "DynamicFilter_AuditLog_MayHaveTenant",
                        new AnnotationValues(oldValue: "EntityFramework.DynamicFilters.DynamicFilterDefinition", newValue: null)
                    },
                });
            
            AlterTableAnnotations(
                "dbo.AppBinaryObjects",
                c => new
                    {
                        Id = c.Guid(nullable: false),
                        TenantId = c.Int(),
                        Bytes = c.Binary(nullable: false),
  },
                annotations: new Dictionary<string, AnnotationValues>
                {
                    { 
                        "DynamicFilter_BinaryObject_MayHaveTenant",
                        new AnnotationValues(oldValue: "EntityFramework.DynamicFilters.DynamicFilterDefinition", newValue: null)
                    },
                });
            
            AlterTableAnnotations(
                "dbo.AppChatMessages",
                c => new
                    {
                        Id = c.Long(nullable: false, identity: true),
                        UserId = c.Long(nullable: false),
                        TenantId = c.Int(),
                        TargetUserId = c.Long(nullable: false),
                        TargetTenantId = c.Int(),
                        Message = c.String(nullable: false),
                        CreationTime = c.DateTime(nullable: false),
                        Side = c.Int(nullable: false),
                        ReadState = c.Int(nullable: false),
                    },
                annotations: new Dictionary<string, AnnotationValues>
                {

And so on..

I have only added those two Indexes yet other tables are now affected?

Thanks