elwig/Elwig/Models/PaymentDeliveryPart.cs

using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;

namespace Elwig.Models {
    [Table("payment_delivery_part"), PrimaryKey("Year", "DId", "DPNr", "AvNr")]
    public class PaymentDeliveryPart {
        [Column("year")]
        public int Year { get; set; }

        [Column("did")]
        public int DId { get; set; }

        [Column("dpnr")]
        public int DPNr { get; set; }

        [Column("avnr")]
        public int AvNr { get; set; }

        [Column("mod_abs")]
        public long ModAbsValue { get; set; }
        [NotMapped]
        public decimal ModAbs {
            get => Variant.Season.DecFromDb(ModAbsValue);
            set => ModAbsValue = Variant.Season.DecToDb(value);
        }

        [Column("mod_rel")]
        public double ModRelValue { get; set; }
        [NotMapped]
        public decimal ModRel {
            get => (decimal)ModRelValue;
            set => ModRelValue = (double)value;
        }

        [Column("bucket_1")]
        public int? Bucket1 { get; set; }

        [Column("bucket_2")]
        public int? Bucket2 { get; set; }

        [Column("bucket_3")]
        public int? Bucket3 { get; set; }

        [Column("bucket_4")]
        public int? Bucket4 { get; set; }

        [Column("bucket_5")]
        public int? Bucket5 { get; set; }

        [Column("bucket_6")]
        public int? Bucket6 { get; set; }

        [Column("bucket_7")]
        public int? Bucket7 { get; set; }

        [Column("bucket_8")]
        public int? Bucket8 { get; set; }

        [Column("bucket_9")]
        public int? Bucket9 { get; set; }

        [NotMapped]
        public int[] Buckets => (new int?[] { Bucket1, Bucket2, Bucket3, Bucket4, Bucket5, Bucket6, Bucket7, Bucket8, Bucket9 })
            .Where(b => b != null).Select(b => b.Value).ToArray();

        [Column("price_1")]
        public long? Price1Value { get; set; }
        [NotMapped]
        public decimal? Price1 {
            get => Price1Value != null ? Variant.Season.DecFromDb(Price1Value.Value) : null;
            set => Price1Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
        }

        [Column("price_2")]
        public long? Price2Value { get; set; }
        [NotMapped]
        public decimal? Price2 {
			get => Price2Value != null ? Variant.Season.DecFromDb(Price2Value.Value) : null;
			set => Price2Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("price_3")]
        public long? Price3Value { get; set; }
        [NotMapped]
        public decimal? Price3 {
			get => Price3Value != null ? Variant.Season.DecFromDb(Price3Value.Value) : null;
			set => Price3Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("price_4")]
        public long? Price4Value { get; set; }
        [NotMapped]
        public decimal? Price4 {
			get => Price4Value != null ? Variant.Season.DecFromDb(Price4Value.Value) : null;
			set => Price4Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("price_5")]
        public long? Price5Value { get; set; }
        [NotMapped]
        public decimal? Price5 {
			get => Price5Value != null ? Variant.Season.DecFromDb(Price5Value.Value) : null;
			set => Price5Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("price_6")]
        public long? Price6Value { get; set; }
        [NotMapped]
        public decimal? Price6 {
			get => Price6Value != null ? Variant.Season.DecFromDb(Price6Value.Value) : null;
			set => Price6Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("price_7")]
        public long? Price7Value { get; set; }
        [NotMapped]
        public decimal? Price7 {
			get => Price7Value != null ? Variant.Season.DecFromDb(Price7Value.Value) : null;
			set => Price7Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("price_8")]
        public long? Price8Value { get; set; }
        [NotMapped]
        public decimal? Price8 {
			get => Price8Value != null ? Variant.Season.DecFromDb(Price8Value.Value) : null;
			set => Price8Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("price_9")]
        public long? Price9Value { get; set; }
        [NotMapped]
        public decimal? Price9 {
			get => Price9Value != null ? Variant.Season.DecFromDb(Price9Value.Value) : null;
			set => Price9Value = value != null ? Variant.Season.DecToDb(value.Value) : null;
		}

        [Column("amount")]
        public long? AmountValue { get; set; }
        [NotMapped]
        public decimal? Amount {
            get => AmountValue != null ? Variant.Season.DecFromDb(AmountValue.Value) : null;
            set => AmountValue = value != null ? Variant.Season.DecToDb(value.Value) : null;
        }

        [NotMapped]
        public decimal[] Prices => (new decimal?[] { Price1, Price2, Price3, Price4, Price5, Price6, Price7, Price8, Price9 })
            .Where(p => p != null).Select(p => p.Value).ToArray();

        [ForeignKey("Year, AvNr")]
        public virtual PaymentVar Variant { get; private set; }

        [ForeignKey("Year, DId, DPNr")]
        public virtual DeliveryPart DeliveryPart { get; private set; }
    }
}