Question

我看过其他问题，但是我没有看到过要在mongo shell中用$regex修改 field 名称的问题。我尝试将db.collection.update与$rename和$regex一起使用的尝试失败了。

我有一个包含以下文档的收藏集：

{
    "_id" : "CWE-693",
    "Name" : "Protection Mechanism Failure",
    "Description" : "The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.",
    "Modes_Of_Introduction" : [
        "Architecture and Design",
        "Implementation",
        "Operation"
    ],
    "Common_Consequences" : [
        "Bypass Protection Mechanism"
    ]
}

我想重命名所有字段名称（“ _id”除外）以消除下划线（“ _”），因此文档看起来像这样：

{
    "_id" : "CWE-693",
    "Name" : "Protection Mechanism Failure",
    "Description" : "The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.",
    "ModesOfIntroduction" : [
        "Architecture and Design",
        "Implementation",
        "Operation"
    ],
    "CommonConsequences" : [
        "Bypass Protection Mechanism"
    ]
}

db.collection.update，$rename和$regex是否可能？还有其他mongo shell编程方式可以实现这一目标吗？

Answer 1

$rename仅可与纯字符串一起使用，而不能与正则表达式一起使用。

因此，您必须编写代码以阅读具有代表性的文档，遍历字段名并组合一个$rename操作才能执行。

$ rename在mongo shell中使用$ regex使用MongoDB字段名称？

1 个答案: