bug in keypropertiescache

Dapper.Contrib.MsSqlTests NET45/Program.cs

@@ -52,6 +52,7 @@ private static void DropTables()
                 connection.Execute(@" drop table Results ");
                 connection.Execute(@" drop table ObjectX ");
                 connection.Execute(@" drop table ObjectY ");
+                connection.Execute(@" drop table ObjectZ ");
             }
             Console.WriteLine("Created database");
         }
@@ -69,6 +70,7 @@ private static void SetupTables()
                 connection.Execute(@" create table Results (Id int IDENTITY(1,1) not null, Name nvarchar(100) not null, [Order] int not null) ");
                 connection.Execute(@" create table ObjectX (ObjectXId nvarchar(100) not null, Name nvarchar(100) not null) ");
                 connection.Execute(@" create table ObjectY (ObjectYId int not null, Name nvarchar(100) not null) ");
+                connection.Execute(@" create table ObjectZ (Id int not null, Name nvarchar(100) not null) ");
             }
             Console.WriteLine("Created database");
         }

Dapper.Contrib.SqliteTests NET45/Program.cs

@@ -38,6 +38,7 @@ private static void Setup()
                 connection.Execute(@" create table Results (Id integer primary key autoincrement not null, Name nvarchar(100) not null, [Order] int not null) ");
                 connection.Execute(@" create table ObjectX (ObjectXId nvarchar(100) not null, Name nvarchar(100) not null) ");
                 connection.Execute(@" create table ObjectY (ObjectYId integer not null, Name nvarchar(100) not null) ");
+                connection.Execute(@" create table ObjectZ (Id integer not null, Name nvarchar(100) not null) ");
             }
             Console.WriteLine("Created database");
         }

Dapper.Contrib.Tests NET45/Program.cs

@@ -38,6 +38,7 @@ private static void Setup()
                 connection.Execute(@" create table Results (Id int IDENTITY(1,1) not null, Name nvarchar(100) not null, [Order] int not null) ");
                 connection.Execute(@" create table ObjectX (ObjectXId nvarchar(100) not null, Name nvarchar(100) not null) ");
                 connection.Execute(@" create table ObjectY (ObjectYId int not null, Name nvarchar(100) not null) ");
+                connection.Execute(@" create table ObjectZ (Id int not null, Name nvarchar(100) not null) ");
             }
             Console.WriteLine("Created database");
         }

Dapper.Contrib.Tests/Tests.cs

@@ -31,6 +31,14 @@ public class ObjectY
         public int ObjectYId { get; set; }
         public string Name { get; set; }
     }
+    
+    [Table("ObjectZ")]
+    public class ObjectZ
+    {
+        [ExplicitKey]
+        public int Id { get; set; }
+        public string Name { get; set; }
+    }
 
     public interface IUser
     {
@@ -153,6 +161,28 @@ public void InsertGetUpdateDeleteWithExplicitKey()
             }
         }
 
+        public void InsertGetUpdateDeleteWithExplicitKeyNamedId()
+        {
+
+            using (var connection = GetOpenConnection())
+            {
+                const int id = 42;
+                var o2 = new ObjectZ() { Id = id, Name = "Foo" };
+                connection.Insert(o2);
+                var list2 = connection.Query<ObjectZ>("select * from ObjectZ").ToList();
+                list2.Count.IsEqualTo(1);
+                o2 = connection.Get<ObjectZ>(id);
+                o2.Id.IsEqualTo(id);
+                //o2.Name = "Bar";
+                //connection.Update(o2);
+                //o2 = connection.Get<ObjectY>(id);
+                //o2.Name.IsEqualTo("Bar");
+                //connection.Delete(o2);
+                //o2 = connection.Get<ObjectY>(id);
+                //o2.IsNull();
+            }
+        }
+
         public void ShortIdentity()
         {
             using (var connection = GetOpenConnection())

Dapper.Contrib/SqlMapperExtensions.cs

@@ -84,12 +84,15 @@ private static List<PropertyInfo> KeyPropertiesCache(Type type)
             }
 
             var allProperties = TypePropertiesCache(type);
-            var keyProperties = allProperties.Where(p => p.GetCustomAttributes(true).Any(a => a is KeyAttribute)).ToList();
+            var keyProperties = allProperties.Where(p =>
+            {
+                return p.GetCustomAttributes(true).Any(a => a is KeyAttribute);
+            }).ToList();
 
             if (keyProperties.Count == 0)
             {
                 var idProp = allProperties.FirstOrDefault(p => p.Name.ToLower() == "id");
-                if (idProp != null)
+                if (idProp != null && !idProp.GetCustomAttributes(true).Any(a => a is ExplicitKeyAttribute))
                 {
                     keyProperties.Add(idProp);
                 }