Module.HallOfFame/Server/Migrations/01000001_AddHallOfFameColumns.cs

using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Migrations;
using Oqtane.Databases.Interfaces;
using Oqtane.Migrations;
using SZUAbsolventenverein.Module.HallOfFame.Migrations.EntityBuilders;
using SZUAbsolventenverein.Module.HallOfFame.Repository;

namespace SZUAbsolventenverein.Module.HallOfFame.Migrations
{
    [DbContext(typeof(HallOfFameContext))]
    [Migration("SZUAbsolventenverein.Module.HallOfFame.01.00.00.01")]
    public class AddHallOfFameColumns : MultiDatabaseMigration
    {
        public AddHallOfFameColumns(IDatabase database) : base(database)
        {
        }

        protected override void Up(MigrationBuilder migrationBuilder)
        {
            var entityBuilder = new HallOfFameEntityBuilder(migrationBuilder, ActiveDatabase);
            
            // Add new columns manually since we are upgrading an existing table
            // Note: Integer columns are generated as default/nullable depending on definition, Oqtane Helpers handle generic types.
            // Using logic similar to Oqtane.Migrations.EntityBuilders
            
            if (ActiveDatabase.Name == "Sqlite") // Sqlite specific or generic
            {
                // Generic AddColumn: Table, Name, Type, Nullable
                // However, Oqtane EntityBuilder usually builds tables.
                // We will use migrationBuilder directly via helper if possible or standard AddColumn.
                
                migrationBuilder.AddColumn<int>(
                    name: "Year",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: false,
                    defaultValue: 0);

                migrationBuilder.AddColumn<string>(
                    name: "Description",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: true); // Allow nulls initially or empty? MaxString usually nullable in Oqtane context? Let's check.
                    
                migrationBuilder.AddColumn<string>(
                    name: "Image",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: true);

                migrationBuilder.AddColumn<string>(
                    name: "Link",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: true);

                migrationBuilder.AddColumn<string>(
                    name: "Status",
                    table: "SZUAbsolventenvereinHallOfFame",
                    maxLength: 50,
                    nullable: true);

                migrationBuilder.AddColumn<int>(
                    name: "UserId",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: false,
                    defaultValue: 0);
            }
            else
            {
                // For SQL Server / others, simply use same AddColumn but allow EF Core to handle types
                 migrationBuilder.AddColumn<int>(
                    name: "Year",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: false,
                    defaultValue: 0);

                migrationBuilder.AddColumn<string>(
                    name: "Description",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: true);
                    
                migrationBuilder.AddColumn<string>(
                    name: "Image",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: true);

                migrationBuilder.AddColumn<string>(
                    name: "Link",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: true);

                migrationBuilder.AddColumn<string>(
                    name: "Status",
                    table: "SZUAbsolventenvereinHallOfFame",
                    maxLength: 50,
                    nullable: true);

                migrationBuilder.AddColumn<int>(
                    name: "UserId",
                    table: "SZUAbsolventenvereinHallOfFame",
                    nullable: false,
                    defaultValue: 0);
            }
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropColumn(
                name: "Year",
                table: "SZUAbsolventenvereinHallOfFame");
                
            migrationBuilder.DropColumn(
                name: "Description",
                table: "SZUAbsolventenvereinHallOfFame");

            migrationBuilder.DropColumn(
                name: "Image",
                table: "SZUAbsolventenvereinHallOfFame");

            migrationBuilder.DropColumn(
                name: "Link",
                table: "SZUAbsolventenvereinHallOfFame");

            migrationBuilder.DropColumn(
                name: "Status",
                table: "SZUAbsolventenvereinHallOfFame");

            migrationBuilder.DropColumn(
                name: "UserId",
                table: "SZUAbsolventenvereinHallOfFame");
        }
    }
}