Update model

Elwig/Models/WbGem.cs

@@ -0,0 +1,19 @@
+using Microsoft.EntityFrameworkCore;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Elwig.Models {
+    [Table("wb_gem"), PrimaryKey("Gkz")]
+    public class WbGem {
+        [Column("gkz")]
+        public int Gkz { get; private set; }
+
+        [Column("hkid")]
+        public string HkId { get; private set; }
+
+        [ForeignKey("Gkz")]
+        public virtual AT_Gem AtGem { get; private set; }
+
+        [ForeignKey("HkId")]
+        public virtual WineOrigin Origin { get; private set; }
+    }
+}