Add callback update

callback_update.go

@@ -0,0 +1,35 @@
+package gorm
+
+func BeforeUpdate(scope *Scope) {
+	scope.CallMethod("BeforeSave")
+	scope.CallMethod("BeforeUpdate")
+}
+
+func Update(scope *Scope) {
+	if !scope.HasError() {
+		var id interface{}
+		if scope.Dialect().SupportLastInsertId() {
+			if sql_result, err := scope.DB().Exec(scope.Sql, scope.SqlVars...); scope.Err(err) == nil {
+				id, err = sql_result.LastInsertId()
+				scope.Err(err)
+			}
+		} else {
+			scope.Err(scope.DB().QueryRow(scope.Sql, scope.SqlVars...).Scan(&id))
+		}
+
+		scope.SetColumn(scope.PrimaryKey(), id)
+	}
+}
+
+func AfterUpdate(scope *Scope) {
+	scope.CallMethod("AfterUpdate")
+	scope.CallMethod("AfterSave")
+}
+
+func init() {
+	DefaultCallback.Update().Register("before_update", BeforeUpdate)
+	DefaultCallback.Update().Register("save_before_associations", SaveBeforeAssociations)
+	DefaultCallback.Update().Register("update", Update)
+	DefaultCallback.Update().Register("save_after_associations", SaveAfterAssociations)
+	DefaultCallback.Update().Register("after_update", AfterUpdate)
+}