Update model database schema

Elwig/Models/Contract.cs

@@ -1,7 +1,6 @@
 using Microsoft.EntityFrameworkCore;
-using System.Collections.Generic;
+using System;
 using System.ComponentModel.DataAnnotations.Schema;
-using System.Linq;
 
 namespace Elwig.Models {
     [Table("contract"), PrimaryKey("VNr")]
@@ -12,19 +11,35 @@ namespace Elwig.Models {
         [Column("mgnr")]
         public int MgNr { get; set; }
 
+        [Column("date")]
+        public string? DateString { get; set; }
+
+        [NotMapped]
+        public DateOnly? Date {
+            get {
+                return DateString != null ? DateOnly.ParseExact(DateString, "yyyy-MM-dd") : null;
+            }
+            set {
+                DateString = value?.ToString("yyyy-MM-dd");
+            }
+        }
+
         [Column("year_from")]
         public int YearFrom { get; set; }
 
         [Column("year_to")]
         public int? YearTo { get; set; }
 
+        [Column("comment")]
+        public string? Comment { get; set; }
+
         [ForeignKey("MgNr")]
         public virtual Member Member { get; private set; }
 
         [InverseProperty("Contract")]
-        public virtual ISet<AreaCommitment> AreaCommitments { get; private set; }
+        public virtual AreaCom? AreaCom { get; private set; }
 
         [NotMapped]
-        public int Area => AreaCommitments.Select(a => a.Area).Sum();
+        public int? Area => AreaCom?.Area;
     }
 }