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AddIndexesMigration.cs

using FluentMigrator;
using Nop.Core.Domain.Customers;
using Nop.Core.Domain.Orders;
using Nop.Core.Domain.Topics;

namespace Nop.Data.Migrations.UpgradeTo480;

[NopSchemaMigration("2024-11-25 00:00:00", "AddIndexesMigration for 4.80.0")]
public class AddIndexesMigration : ForwardOnlyMigration
{
    private readonly INopDataProvider _dataProvider;

    public AddIndexesMigration(INopDataProvider dataProvider)
    {
        _dataProvider = dataProvider;
    }

    /// 
    /// Collect the UP migration expressions
    /// 
    public override void Up()
    {
        if (!Schema.Table(nameof(Customer)).Index("IX_Customer_Deleted").Exists())
            Create.Index("IX_Customer_Deleted")
                .OnTable(nameof(Customer))
                .OnColumn(nameof(Customer.Deleted)).Ascending()
                .WithOptions().NonClustered();

        //#7377
        if (!Schema.Table(nameof(Order)).Index("AK_Order_OrderGuid").Exists() &&
            !Schema.Table(nameof(Order)).Constraint("AK_Order_OrderGuid").Exists())
        {
            var orders = _dataProvider.GetTable().GroupBy(p => p.OrderGuid, p => p)
                .Where(p => p.Count() > 1)
                .SelectMany(p => p)
                .ToList();

            if (orders.Any())
            {
                foreach (var order in orders)
                    order.OrderGuid = Guid.NewGuid();

                _dataProvider.UpdateEntities(orders);
            }

            Create.UniqueConstraint("AK_Order_OrderGuid")
                .OnTable(nameof(Order))
                .Column(nameof(Order.OrderGuid));
        }

        //#7296
        if (!Schema.Table(nameof(Topic)).Index("IX_Topic_SystemName").Exists())
            Create.Index("IX_Topic_SystemName")
                .OnTable(nameof(Topic))
                .OnColumn(nameof(Topic.SystemName)).Ascending()
                .WithOptions().NonClustered();
    }
}