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当我们给一个图书模型添加 作者模型(多对多关系) 后还需要在保存一次吗?
图书模型
作者模型
... book.save() book.authors.add(author) # 下面这步是需要做的吗? book.save()
提出这个问题的背景是因为我需要利用Model去批量添加数据,如果执行两次保存,数据保存速度非常慢。
Model
认证高级PHP讲师
Just try it out and it will be ok
Just try it out and it will be ok