我有一个健身运动数据库,其中包含一系列力量训练。由于一个练习可以通过多种方式完成,因此我添加了一个基本练习
i、 e._id:"BenchPressBothHands"
和一些类似的练习,称为_id:"BenchPressRightHand"
,derivedFrom:"BenchPressBothHands"
除了文档中已经存在的键之外,是否有方法将所有内容从_id:"BenchPressBothHands"
复制到_id:"BenchPressRightHand"
伪代码:
for documents in col.find():
derivedFrom = documents.get('derivedFrom')
if derivedFrom is not None:
update document with everything from the derivedFrom-document except the keys which already exists.
目前没有回答
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