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我收藏的文件這樣如何扁平化子文檔中蒙戈DB
{
"_id" : ObjectId("587c8d0364b6e32706f7edef"),
"first_name" : "John",
"last_name" : "Doe",
"password" : "aasdjsabb12213b21bbcghc1h2",
"shift" : "A",
"dept" : "Management"
"Requests" : [
{
"weekId" : 1,
"MO" : 1,
"TU" : 2,
"W" : 3,
"TH" : 9,
"FR" : 10,
"SA" : 6,
"SU" : 1
}
]
}
我想導出我的查詢到CSV的結果和需要領域壓扁了這樣
{
"_id" : ObjectId("587c8d0364b6e32706f7edef"),
"first_name" : "John",
"last_name" : "Doe",
"password" : "aasdjsabb12213b21bbcghc1h2",
"shift" : "A",
"dept" : "Management"
"weekId" : 1,
"MO" : 1,
"TU" : 2,
"W" : 3,
"TH" : 9,
"FR" : 10,
"SA" : 6,
"SU" : 1
}
我試圖使用聚合函數,但無濟於事。任何人都可以建議我如何做到這一點?
這是我工作的代碼,但我不認爲這是正確的方式
db.req.aggregate([{$unwind:'$Requests'},{$project: {first_name:1,last_name:1,dept:1,"WeekId":"$Requests.weekdId","Mon":"$Requests.MO","Tue":"$Requests.TU","Wed":"$Requests.W","Thu":"$Requests.TH","Fri":"$Requests.FR","Sat":"$Requests.SA","Sun":"$Requests.SU"}},{$out:"results"}]);
你能提供一個你已經嘗試過的代碼示例嗎?知道你從哪裏開始將幫助用戶提供更有意義的答案。 –
什麼是您的MongoDB服務器版本? – chridam