Use the same enum for OrderDb and OrderDto models

Author: pmoleri

NorthwindCRUD/Helpers/Enums.cs

@@ -1,5 +1,5 @@
 using NorthwindCRUD.Models.Dtos;
-using static NorthwindCRUD.Helpers.Enums;
+using NorthwindCRUD.Models.Enums;
 
 namespace NorthwindCRUD.Models.Contracts
 {

NorthwindCRUD/Models/Contracts/IOrder.cs

@@ -1,5 +1,6 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
+using NorthwindCRUD.Models.Enums;
 
 namespace NorthwindCRUD.Models.DbModels
 {
@@ -29,7 +30,7 @@ public OrderDb()
 
         public string RequiredDate { get; set; }
 
-        public int ShipVia { get; set; }
+        public Shipping ShipVia { get; set; }
 
         public double Freight { get; set; }
 

NorthwindCRUD/Models/DbModels/OrderDb.cs

@@ -1,6 +1,6 @@
 using System.ComponentModel.DataAnnotations;
 using NorthwindCRUD.Models.Contracts;
-using static NorthwindCRUD.Helpers.Enums;
+using NorthwindCRUD.Models.Enums;
 
 namespace NorthwindCRUD.Models.Dtos
 {

NorthwindCRUD/Models/Dtos/OrderDto.cs

@@ -0,0 +1,19 @@
+using System.Runtime.Serialization;
+
+namespace NorthwindCRUD.Models.Enums
+{
+    public enum Shipping
+    {
+        [EnumMember(Value = "SeaFreight")]
+        SeaFreight,
+
+        [EnumMember(Value = "GroundTransport")]
+        GroundTransport,
+
+        [EnumMember(Value = "AirCargo")]
+        AirCargo,
+
+        [EnumMember(Value = "Mail")]
+        Mail,
+    }
+}

NorthwindCRUD/Models/Enums/Enums.cs

@@ -258,6 +258,12 @@ private static Expression GetSearchValue(dynamic? value, Type targetType)
         }
 
         var nonNullableType = Nullable.GetUnderlyingType(targetType) ?? targetType;
+
+        if (nonNullableType.IsEnum && value is string)
+        {
+            return Expression.Constant(Enum.Parse(nonNullableType, value));
+        }
+
         var convertedValue = Convert.ChangeType(value, nonNullableType, CultureInfo.InvariantCulture);
         return Expression.Constant(convertedValue, targetType);
     }