Models: Add Entities/ folder

Elwig/Models/Entities/PaymentMember.cs

@@ -0,0 +1,34 @@
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models.Entities {
+    [Table("payment_member"), PrimaryKey("Year", "AvNr", "MgNr")]
+    public class PaymentMember {
+        [Column("year")]
+        public int Year { get; set; }
+
+        [Column("avnr")]
+        public int AvNr { get; set; }
+
+        [Column("mgnr")]
+        public int MgNr { get; set; }
+
+        [Column("amount")]
+        public long AmountValue { get; set; }
+
+        [NotMapped]
+        public decimal Amount {
+            get => Variant.Season.DecFromDb(AmountValue);
+            set => AmountValue = Variant.Season.DecToDb(value);
+        }
+
+        [ForeignKey("Year, AvNr")]
+        public virtual PaymentVar Variant { get; private set; }
+
+        [ForeignKey("MgNr")]
+        public virtual Member Member { get; private set; }
+
+        [InverseProperty("Payment")]
+        public virtual Credit? Credit { get; private set; }
+    }
+}