prs/prs.stores/StockWarehouseStore.cs

using System.Linq;
using Comal.Classes;
using InABox.Core;

namespace Comal.Stores
{
    public class StockWarehouseStore : BaseStore<StockWarehouse>
    {
        protected override void BeforeSave(StockWarehouse entity)
        {
            base.BeforeSave(entity);

            // Try to make sure there is one and one only default warehouse
            var otherdefaults = Provider.Query(
                new Filter<StockWarehouse>(x => x.ID).IsNotEqualTo(entity.ID).And(x => x.Default).IsEqualTo(true),
                new Columns<StockWarehouse>(x => x.ID, x => x.Default)
            ).Rows.Select(x => x.ToObject<StockWarehouse>()).ToArray();

            if (!entity.Default)
                if (!otherdefaults.Any())
                    entity.Default = true;

            if (entity.Default)
            {
                entity.Active = true;
                foreach (var otherdefault in otherdefaults)
                    otherdefault.Default = false;
                Provider.Save(otherdefaults);
            }
        }
    }
}