// SaveOrUpdate
func (s Xorm) SaveOrUpdate(model interface{}) (int64, error) {
// id == ""; insert with new uuid.
id := mmodel.GetModelId(model)
if id == "" {
logger.Trace("uuid save")
return s.UuidSave(model)
}
// id!=null && id in db, update
tableName := mmodel.GetModelTableName(model)
q := fmt.Sprintf("select Id from %s where Id = ? ", tableName)
row, _ := s.Engine.Query(q, id)
if len(row) > 0 {
logger.Trace("update")
n, err := s.Engine.Id(id).Update(model)
logger.CheckError(err)
return n, err
}
// id != null && id not in db, insert with provide id
logger.Trace("normal insert.")
n, err := s.Engine.Insert(model)
logger.CheckError(err)
return n, err
}
// Id is uuid value.
// model is a pointer.
func (s Xorm) UuidSave(model interface{}) (int64, error) {
logger.Trace("UuidSave modell")
if mmodel.GetModelId(model) == "" {
mmodel.AddModelUuid(model)
}
n, err := s.Engine.Insert(model)
logger.CheckError(err)
return n, err
}
// model must have field Id and Id not null.
func (s Xorm) Update(model interface{}) (int64, error) {
id := mmodel.GetModelId(model)
if id == "" {
err := fmt.Errorf("Cannot update model without Id")
return 0, err
}
n, err := s.Engine.Id(id).Update(model)
logger.CheckError(err)
return n, err
}
func Demo(m1 interface{}) {
fmt.Println(mmodel.GetModelId(m1))
m2 := mmodel.AddModelUuid(m1)
fmt.Printf("%+v\n", m1)
fmt.Printf("%+v\n", m2)
}