MongoDB Schema Design - enable atomicity

Question

我有一個基於下面的MongoDB模式的集合，這涉及到電子商務交易，我有目的地使用單個文檔來實現任何更新的原子性，如下所示。

我將在報告中有以下三種用例。

1. 做一個在所有州的所有customerTransactions的總和。
2. 在每個州單獨處理/確認/可用/兌換所有客戶交易的總和。
3. 按贖回狀態分組所有的customerTransactions，按日期分組。

用例1 & 2對我來說很簡單，但對於用例＃3，我可以對模式做更多的事情以使它更容易實現。

{ 
     "_id":"id", 
     "cuid":"CUIDFromCustomerCollection", 
     "customerTransactions":{ 

     { 
     "retailer":"www.walmart.com","purchaseAmount":"123.00","cashbackAmount":"12.00","state":"pending","transactionTimestamp":"timestampValue","updateTimestamp":"timestampValue" 
     }, 
     { 
      "retailer":"www.walmart.com","purchaseAmount":"123.00","cashbackAmount":"12.00","state":"confirmed","transactionTimestamp":"timestampValue","updateTimestamp":"timestampValue" 
     } , 
     { 
      "retailer":"www.walmart.com","purchaseAmount":"123.00","cashbackAmount":"12.00","state":"available","transactionTimestamp":"timestampValue","updateTimestamp":"timestampValue" 
     } , 
      { 
      "retailer":"www.walmart.com","purchaseAmount":"123.00","cashbackAmount":"12.00","state":"redeemed","transactionTimestamp":"timestampValue","updateTimestamp":"timestampValue" 
     } 

} 

Answer 1

該設計適用於所有三種用例。

對「customerTransactions.state」進行索引將有助於優化。