Jpa - 级联删除并保存 【踩坑】

前言

Jpa oneToMany

级联查询处理的实体 jpa会托管。

A collection with cascade=“all-delete-orphan” was no longer referenced by the owning entity instance:

  private void toAgreeOrderAskFor(OrderAskFor oldOrderAskFor, HandleOrderAskForRequest request) {
        List<OrderAskForItinerary> oldItineraries = oldOrderAskFor.getItineraries();
        if (!CollectionUtils.isEmpty(oldItineraries)) {
            // relieveCascade(oldItineraries);
            
            List<ItineraryElement> newItineraries = request.getItineraries();
            List<OrderAskForItinerary> orderAskForItineraries = orderAskForAssembler.toOrderAskForItineraries(newItineraries, oldOrderAskFor);
            // 先clear
            oldItineraries.clear();
            // 再Add
            oldItineraries.addAll(orderAskForItineraries);

修改：如果他之前是list，那么就先clear,然后addAll。然后save

最后

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