Make sure UpdateColumn works with CamelCase

do.go

@@ -208,7 +208,9 @@ func (s *Do) convertToMapInterface(values interface{}) map[string]interface{} {
 
 	switch value := values.(type) {
 	case map[string]interface{}:
-		attrs = value
+		for k, v := range value {
+			attrs[toSnake(k)] = v
+		}
 	case []interface{}:
 		for _, v := range value {
 			for key, value := range s.convertToMapInterface(v) {

gorm_test.go

@@ -868,6 +868,14 @@ func TestUpdate(t *testing.T) {
 	if db.First(&Product{}, "code = '789'").Error != nil {
 		t.Errorf("Product 456 should be changed to 789")
 	}
+
+	if db.Model(&product2).Update("CreatedAt", time.Now().Add(time.Hour)).Error != nil {
+		t.Error("No error should raise when update with CamelCase")
+	}
+
+	if db.Model(&product2).UpdateColumn("CreatedAt", time.Now().Add(time.Hour)).Error != nil {
+		t.Error("No error should raise when update_column with CamelCase")
+	}
 }
 
 func TestUpdates(t *testing.T) {

model.go

@@ -132,6 +132,7 @@ func (m *Model) updatedColumnsAndValues(values map[string]interface{}, ignore_pr
 
 	data := m.reflectData()
 	if !data.CanAddr() {
+		m.do.err(errors.New("Can't take address of the object"))
 		return
 	}