Prevented duplicate bill numbers

prs.stores/BillStore.cs

@@ -1,22 +1,35 @@
 using Comal.Classes;
+using InABox.Core;
 using System;
 
-namespace Comal.Stores
+namespace Comal.Stores;
+
+internal class BillStore : BaseStore<Bill>
 {
-    internal class BillStore : BaseStore<Bill>
+    protected override void BeforeSave(Bill entity)
     {
-        protected override void BeforeSave(Bill entity)
+        base.BeforeSave(entity);
+
+        if(entity.HasOriginalValue(x => x.Number) || entity.SupplierLink.HasOriginalValue(x => x.ID))
         {
-            base.BeforeSave(entity);
-            //UpdateAggregate<Supplier>(entity, entity.SupplierLink, Sum<Supplier>(b => b.Balance, s => s.Balance));
+            var existing = Provider.Query<Bill>(
+                new Filter<Bill>(x => x.Number).IsEqualTo(entity.Number)
+                    .And(x => x.SupplierLink.ID).IsEqualTo(entity.SupplierLink.ID)
+                    .And(x => x.ID).IsNotEqualTo(entity.ID),
+                Columns.None<Bill>().Add(x => x.ID));
+            if(existing.Rows.Count > 0)
+            {
+                throw new DuplicateCodeException(typeof(Bill), new Dictionary<string, object> {{ nameof(Bill.Number), entity.Number }});
+            }
         }
+        //UpdateAggregate<Supplier>(entity, entity.SupplierLink, Sum<Supplier>(b => b.Balance, s => s.Balance));
+    }
 
-        protected override void BeforeDelete(Bill entity)
-        {
-            base.BeforeDelete(entity);
+    protected override void BeforeDelete(Bill entity)
+    {
+        base.BeforeDelete(entity);
 
-            entity.SupplierLink.ID = Guid.Empty;
-            //UpdateAggregate<Supplier>(entity, entity.SupplierLink, Sum<Supplier>(b => b.Balance, s => s.Balance));
-        }
+        entity.SupplierLink.ID = Guid.Empty;
+        //UpdateAggregate<Supplier>(entity, entity.SupplierLink, Sum<Supplier>(b => b.Balance, s => s.Balance));
     }
 }