Timestamp should always be saved in UTC.

Signed-off-by: Phan Le <ple@pivotallabs.com>

callback_create.go

@@ -13,8 +13,8 @@ func BeforeCreate(scope *Scope) {
 
 func UpdateTimeStampWhenCreate(scope *Scope) {
 	if !scope.HasError() {
-		scope.SetColumn("CreatedAt", time.Now())
-		scope.SetColumn("UpdatedAt", time.Now())
+		scope.SetColumn("CreatedAt", time.Now().UTC())
+		scope.SetColumn("UpdatedAt", time.Now().UTC())
 	}
 }
 

callback_delete.go

@@ -15,7 +15,7 @@ func Delete(scope *Scope) {
 			scope.Raw(
 				fmt.Sprintf("UPDATE %v SET deleted_at=%v %v",
 					scope.TableName(),
-					scope.AddToVars(time.Now()),
+					scope.AddToVars(time.Now().UTC()),
 					scope.CombinedConditionSql(),
 				))
 		} else {

callback_update.go

@@ -36,7 +36,7 @@ func BeforeUpdate(scope *Scope) {
 func UpdateTimeStampWhenUpdate(scope *Scope) {
 	_, ok := scope.Get("gorm:update_column")
 	if !ok {
-		scope.SetColumn("UpdatedAt", time.Now())
+		scope.SetColumn("UpdatedAt", time.Now().UTC())
 	}
 }
 

main_test.go

@@ -574,9 +574,10 @@ func TestCount(t *testing.T) {
 	}
 }
 
-func TestCreatedAtAndUpdatedAt(t *testing.T) {
-	name := "check_created_at_and_updated_at"
+func TestCreatedAtAndUpdatedAtUpdateCorrectly(t *testing.T) {
+	name := "check_created_at_and_updated_at_update_correctly"
 	u := User{Name: name, Age: 1}
+
 	db.Save(&u)
 	created_at := u.CreatedAt
 	updated_at := u.UpdatedAt
@@ -602,6 +603,22 @@ func TestCreatedAtAndUpdatedAt(t *testing.T) {
 	}
 }
 
+func TestCreatedAtAndUpdatedAtAreSavedAsUTC(t *testing.T) {
+	name := "check_created_at_and_updated_at_saved_as_utc"
+	u := User{Name: name, Age: 1}
+
+	db.Save(&u)
+	created_at := u.CreatedAt
+	updated_at := u.UpdatedAt
+
+	if created_at.Location() != time.UTC {
+		t.Errorf("created_at should be UTC")
+	}
+	if updated_at.Location() != time.UTC {
+		t.Errorf("updated_at should be UTC")
+	}
+}
+
 func (s *Product) BeforeCreate() (err error) {
 	if s.Code == "Invalid" {
 		err = errors.New("invalid product")