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| 1 | +using System; |
| 2 | +using System.Linq; |
| 3 | +using System.Linq.Expressions; |
| 4 | +using LinqToDB; |
| 5 | +using LinqToDB.Data; |
| 6 | +using LinqToDB.Linq; |
| 7 | +using LinqToDB.Mapping; |
| 8 | +using NUnit.Framework; |
| 9 | + |
| 10 | +namespace Tests.UserTests |
| 11 | +{ |
| 12 | + [TestFixture] |
| 13 | + public class Issue2468Tests : TestBase |
| 14 | + { |
| 15 | + public enum StatusEnum |
| 16 | + { |
| 17 | + Unknown = 0, |
| 18 | + Open = 1, |
| 19 | + InProgress = 2, |
| 20 | + Done = 3, |
| 21 | + } |
| 22 | + |
| 23 | + public enum ColorEnum |
| 24 | + { |
| 25 | + Blue = 0, |
| 26 | + Red = 10, |
| 27 | + Green = 20, |
| 28 | + } |
| 29 | + |
| 30 | + public enum CMYKEnum |
| 31 | + { |
| 32 | + Cyan = 0, |
| 33 | + Magenta = 10, |
| 34 | + Yellow = 20, |
| 35 | + Black = 40, |
| 36 | + } |
| 37 | + |
| 38 | + [Table] |
| 39 | + public class InventoryResourceDTO |
| 40 | + { |
| 41 | + [Column] |
| 42 | + public Guid Id { get; set; } |
| 43 | + |
| 44 | + [Column] |
| 45 | + public StatusEnum Status { get; set; } |
| 46 | + |
| 47 | + [Column] |
| 48 | + public ColorEnum Color { get; set; } |
| 49 | + |
| 50 | + [Column] |
| 51 | + public CMYKEnum CMYKColor { get; set; } |
| 52 | + } |
| 53 | + |
| 54 | + private static class MyExtensions |
| 55 | + { |
| 56 | + [ExpressionMethod(nameof(StatusEnumToStringImpl))] |
| 57 | + public static string StatusEnumToString(StatusEnum v) |
| 58 | + { |
| 59 | + return v.ToString(); |
| 60 | + } |
| 61 | + |
| 62 | + private static Expression<Func<StatusEnum, string>> StatusEnumToStringImpl() |
| 63 | + { |
| 64 | + return v => v == StatusEnum.Done ? "Done" : |
| 65 | + v == StatusEnum.Open ? "Open" : |
| 66 | + v == StatusEnum.InProgress ? "InProgress" : "Unknown"; |
| 67 | + } |
| 68 | + } |
| 69 | + |
| 70 | + public static void MapEnumToString<T>() where T : struct |
| 71 | + { |
| 72 | + MapEnumToString(typeof(T)); |
| 73 | + } |
| 74 | + |
| 75 | + public static void MapEnumToString(Type type) |
| 76 | + { |
| 77 | + var param = Expression.Parameter(type, "enum"); |
| 78 | + var values = Enum.GetValues(type); |
| 79 | + var list = (System.Collections.IList)values; |
| 80 | + Expression retE = Expression.Constant(null, typeof(string)); |
| 81 | + |
| 82 | + for (var i = values.Length - 1; i >= 0; i--) |
| 83 | + { |
| 84 | + var v = list[i]!; |
| 85 | + var eq = Expression.Equal(Expression.Constant(v, type), param); |
| 86 | + retE = Expression.Condition(eq, Expression.Constant(v.ToString()), retE); |
| 87 | + } |
| 88 | + |
| 89 | + var lambda = Expression.Lambda(retE, param); |
| 90 | + |
| 91 | + var toStringMethod = type.GetMethods().First(m => m.Name == "ToString" && m.GetParameters().Length == 0); |
| 92 | + |
| 93 | + Expressions.MapMember(toStringMethod, lambda); |
| 94 | + } |
| 95 | + |
| 96 | + |
| 97 | + static Issue2468Tests() |
| 98 | + { |
| 99 | + MapEnumToString<ColorEnum>(); |
| 100 | + MapEnumToString<CMYKEnum>(); |
| 101 | + Expressions.MapMember((StatusEnum v) => v.ToString(), v => MyExtensions.StatusEnumToString(v)); |
| 102 | + } |
| 103 | + |
| 104 | + [Test] |
| 105 | + public void Issue2468Test( |
| 106 | + [IncludeDataSources(TestProvName.AllSQLite)] |
| 107 | + string context) |
| 108 | + { |
| 109 | + |
| 110 | + using (var db = (DataConnection)GetDataContext(context)) |
| 111 | + using (var itb = db.CreateLocalTable<InventoryResourceDTO>()) |
| 112 | + { |
| 113 | + var dto1 = new InventoryResourceDTO |
| 114 | + { |
| 115 | + Color = ColorEnum.Blue, Id = Guid.NewGuid(), CMYKColor = CMYKEnum.Cyan, Status = StatusEnum.Open |
| 116 | + }; |
| 117 | + |
| 118 | + db.Insert(dto1); |
| 119 | + |
| 120 | + var list = itb |
| 121 | + .Where(x => |
| 122 | + x.Color.ToString().Contains("Bl") |
| 123 | + && x.CMYKColor.ToString().Contains("Cya") |
| 124 | + && x.Status.ToString().Contains("en") |
| 125 | + ) |
| 126 | + .ToList(); |
| 127 | + |
| 128 | + Assert.That(list.Count, Is.EqualTo(1)); |
| 129 | + } |
| 130 | + } |
| 131 | + } |
| 132 | +} |
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