现有如下格式的集合
"objectiveQuestions" : [{ "answer" : "A", "index" : 2, "isCorrect" : 1, "subjectId" : 5967 }, { "subjectId" : 5968, "answer" : "A", "isCorrect" : 0, "index" : 3 }, ...]现在要为每个在objectiveQuestions元素添加score字段, 并给初始值2. 请问如何构造update语句呢
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加个
multi: truehttp://docs.mongodb.org/manual/reference/method/db.collection.update/
update({},{"$setOnInsert":{'score': 2}}, True, True)