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如何使用mongo 中的点记字查询空格的字符串?
原标题:How do I query for strings with spaces using dot notation in mongo?

我在一个蒙戈数据库里有一个子对象, 包括包含空格的字段, 比如 :

{name: "John Doe", subdata: {"Field 1": "Something", "Field 2": "Something else"}}

从我所能找到的, 蒙戈允许字段 1 和 2, 但我一直找不到任何指示 如何构建查询以查找子数据 。 实地 1 。 是否有一种方法我可以搜索我的例子中的 1 和 2, 或者我应该重组我的数据来清除空白空间?

最佳回答

我不知道Pymongo的情况,但许多其他语言的图书馆都提供对象文件映射功能。我敢打赌,你也会对此有问题,因为“一战区”在我所听到的每一种语言中都是无效的识别码。

我的忠告是:摆脱白空间, 你在未来会节省大量的时间。

问题回答

除非我误解你的问题,否则你可以做:

db.test.find({ "subdata.Field 1" :  Something  } );

空间是 mongo 字段名称的有效字符 。

字段名称不能包含点(即.)或null字符 (即),而且不能以美元符号(即$)开头。

所以这种外观应该像魅力一样发挥作用:

db.collection.find({"subdata.Field 1": {$exists: true}})




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