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")

type Schema struct {

	deleteCallback.Register("gorm:delete_before_associations", DeleteBeforeAssociations)
	deleteCallback.Register("gorm:delete", Delete(config))
	deleteCallback.Register("gorm:after_delete", AfterDelete)
	deleteCallback.Match(enableTransaction).Register("gorm:commit_or_rollback_transaction", CommitOrRollbackTransaction)
	deleteCallback.Clauses = config.DeleteClauses

	updateCallback := db.Callback().Update()