[英]How to join _id with nested _id MongoDB
I'm working on project that required to joined nested _id with and _id for exemple I have我正在研究需要将嵌套 _id 和 _id 加入的项目,例如我有
Collection TPE looks like this系列 TPE 看起来像这样
{
sn:[{sn:0001,TPE_id:01},{sn:0001,TPE_id:02},{sn:0001,TPE_id:03},{sn:0001,TPE_id:04}],
sellerName:'XXX',
networkType:'GPRS'
}
And I have collection transaction that looks like this我的收藏交易看起来像这样
{
TPE_id:01,
transactionAmount:'XXX',
transactionType:'DECLINED'
}
{
TPE_id:01,
transactionAmount:'XXX',
transactionType:'APPROVED'
}
{
TPE_id:02,
transactionAmount:'XXX',
transactionType:'APPROVED'
}
{
TPE_id:04,
transactionAmount:'XXX',
transactionType:'CANCELED'
}
How can I join to get the transaction of related TPE_id for exemple例如,如何加入以获取相关 TPE_id 的交易
newArray 1 : [ {
TPE_id:01,
transactionAmount:'XXX',
transactionType:'DECLINED'
}
{
TPE_id:01,
transactionAmount:'XXX',
transactionType:'APPROVED'
}]
newArray2 [{
TPE_id:04,
transactionAmount:'XXX',
transactionType:'CANCELED'
}]
newArray3 [ {
TPE_id:02,
transactionAmount:'XXX',
transactionType:'APPROVED'
}]
Can i do a loop through sn array to martch all the TPE_id with their related transaction ?我可以通过 sn 数组循环以将所有 TPE_id 与其相关事务进行匹配吗?
In case I have multiple Sn each Sn has array of TPE_id I want to get sn of specific id ?如果我有多个 Sn,每个 Sn 都有 TPE_id 数组,我想获得特定 id 的 sn 吗?
Sorry for my bad english对不起,我的英语不好
Here are the hints以下是提示
sn
field of TPE collection
, it will restructure your array documentsTPE collection
的sn
字段,它将重组您的数组文档$lookup
on Transactions
collectionTransactions
集合进行$lookup
project
to get the desired o/p formatproject
获取所需的 o/p 格式
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