diff --git a/schema/schema.go b/schema/schema.go index e13a5ed1..3e7459ce 100644 --- a/schema/schema.go +++ b/schema/schema.go @@ -13,6 +13,20 @@ import ( "gorm.io/gorm/logger" ) +type callbackType string + +const ( + callbackTypeBeforeCreate callbackType = "BeforeCreate" + callbackTypeBeforeUpdate callbackType = "BeforeUpdate" + callbackTypeAfterCreate callbackType = "AfterCreate" + callbackTypeAfterUpdate callbackType = "AfterUpdate" + callbackTypeBeforeSave callbackType = "BeforeSave" + callbackTypeAfterSave callbackType = "AfterSave" + callbackTypeBeforeDelete callbackType = "BeforeDelete" + callbackTypeAfterDelete callbackType = "AfterDelete" + callbackTypeAfterFind callbackType = "AfterFind" +) + // ErrUnsupportedDataType unsupported data type var ErrUnsupportedDataType = errors.New("unsupported data type") @@ -288,14 +302,20 @@ func ParseWithSpecialTableName(dest interface{}, cacheStore *sync.Map, namer Nam } } - callbacks := []string{"BeforeCreate", "AfterCreate", "BeforeUpdate", "AfterUpdate", "BeforeSave", "AfterSave", "BeforeDelete", "AfterDelete", "AfterFind"} - for _, name := range callbacks { - if methodValue := modelValue.MethodByName(name); methodValue.IsValid() { + callbackTypes := []callbackType{ + callbackTypeBeforeCreate, callbackTypeAfterCreate, + callbackTypeBeforeUpdate, callbackTypeAfterUpdate, + callbackTypeBeforeSave, callbackTypeAfterSave, + callbackTypeBeforeDelete, callbackTypeAfterDelete, + callbackTypeAfterFind, + } + for _, cbName := range callbackTypes { + if methodValue := callBackToMethodValue(modelValue, cbName); methodValue.IsValid() { switch methodValue.Type().String() { case "func(*gorm.DB) error": // TODO hack - reflect.Indirect(reflect.ValueOf(schema)).FieldByName(name).SetBool(true) + reflect.Indirect(reflect.ValueOf(schema)).FieldByName(string(cbName)).SetBool(true) default: - logger.Default.Warn(context.Background(), "Model %v don't match %vInterface, should be `%v(*gorm.DB) error`. Please see https://gorm.io/docs/hooks.html", schema, name, name) + logger.Default.Warn(context.Background(), "Model %v don't match %vInterface, should be `%v(*gorm.DB) error`. Please see https://gorm.io/docs/hooks.html", schema, cbName, cbName) } } } @@ -349,6 +369,39 @@ func ParseWithSpecialTableName(dest interface{}, cacheStore *sync.Map, namer Nam return schema, schema.err } +// This unrolling is needed to show to the compiler the exact set of methods +// that can be used on the modelType. +// Prior to go1.22 any use of MethodByName would cause the linker to +// abandon dead code elimination for the entire binary. +// As of go1.22 the compiler supports one special case of a string constant +// being passed to MethodByName. For enterprise customers or those building +// large binaries, this gives a significant reduction in binary size. +// https://github.com/golang/go/issues/62257 +func callBackToMethodValue(modelType reflect.Value, cbType callbackType) reflect.Value { + switch cbType { + case callbackTypeBeforeCreate: + return modelType.MethodByName(string(callbackTypeBeforeCreate)) + case callbackTypeAfterCreate: + return modelType.MethodByName(string(callbackTypeAfterCreate)) + case callbackTypeBeforeUpdate: + return modelType.MethodByName(string(callbackTypeBeforeUpdate)) + case callbackTypeAfterUpdate: + return modelType.MethodByName(string(callbackTypeAfterUpdate)) + case callbackTypeBeforeSave: + return modelType.MethodByName(string(callbackTypeBeforeSave)) + case callbackTypeAfterSave: + return modelType.MethodByName(string(callbackTypeAfterSave)) + case callbackTypeBeforeDelete: + return modelType.MethodByName(string(callbackTypeBeforeDelete)) + case callbackTypeAfterDelete: + return modelType.MethodByName(string(callbackTypeAfterDelete)) + case callbackTypeAfterFind: + return modelType.MethodByName(string(callbackTypeAfterFind)) + default: + return reflect.ValueOf(nil) + } +} + func getOrParse(dest interface{}, cacheStore *sync.Map, namer Namer) (*Schema, error) { modelType := reflect.ValueOf(dest).Type() for modelType.Kind() == reflect.Slice || modelType.Kind() == reflect.Array || modelType.Kind() == reflect.Ptr {