mongodb - querying on internals in mongo

Question

I have document structure like:

    { "_id": { "$oid" : "51711cd87023380037000001" }, 
    "dayData": "{ "daysdata":{"date":"02-12-2013","week_day":"","month":"","date_day":"","year":"2013"}}" 
    }

I want to extract document having date = "02-12-2013" in the above. Here i am trying to query on a value which is also a json. Please let me know how to use mongodb java driver to extract this

Answer 1

不回答（stackoverflow 不会让我评论，因为我没有足够的分数！）

您的包含 json 的字符串存在语法错误。"后面有单"year":"2013"

您可能必须解决第一个问题。