没有对象解决方案的动态密钥 - MongoDB findOneAndUpdate 调用

Question

我能够成功地将 { key: value } 结构用于 ...

    const findOneAndUpdateUpdate = { 
      $set: ratingsHistoryObject,
      $inc: ratingIncrementObject
    }

... 以下代码的一部分。然而，对于..

    const findOneAndUpdateFilter = {
      'userId': userIds[0],
      matchIdPath: { $exists: false },
    }

... 部分，不使用大括号。它应该是这样的：...

    const findOneAndUpdateFilter = {
      'userId': userIds[0],
      "ratingsHistory.squash.60003e9267684effa0f56ffb": { $exists: false },
    }

...但随后动态 matchIdPath。当 { key: value } 方法在这里不起作用时，我怎么能意识到这一点，因为没有花括号开始 matchIdPath？

完整代码摘录：

    // Other code

    matchesData.forEach(async match => {

    // Other code

    const matchIdPath = `ratingsHistory.${match.matchType}.${match._id}`

    
    var ratingsHistoryObject = {}
    var ratingsHistoryObjectKey = 'ratingsHistory.' + match.matchType + '.' + match._id
    var ratingsHistoryObjectValue = difference_result
    ratingsHistoryObject[ratingsHistoryObjectKey] = ratingsHistoryObjectValue
    
    var ratingIncrementObject = {}
    var ratingIncrementObjectKey = 'ratings.' + match.matchType
    var ratingIncrementObjectValue = difference_result
    ratingIncrementObject[ratingIncrementObjectKey] = ratingIncrementObjectValue
    

    const findOneAndUpdateFilter = {
      'userId': userIds[0],
      matchIdPath: { $exists: false },
    }
    
    
    const findOneAndUpdateUpdate = { 
      $set: ratingsHistoryObject,
      $inc: ratingIncrementObject
    }

    const usersResult = await usersCollection.findOneAndUpdate(findOneAndUpdateFilter, findOneAndUpdateUpdate);

Answer 1

您可以使用 computed property name syntax:

const findOneAndUpdateFilter = {
    'userId': userIds[0],
    [matchIdPath]: { $exists: false },
}

示例：

let key = "ratingsHistory.squash.60003e9267684effa0f56ffb";

let obj = { [key]: { $exists: false } };

console.log(obj);

没有对象解决方案的动态密钥 - MongoDB findOneAndUpdate 调用

Dynamic key without Object solution - MongoDB findOneAndUpdate call

javascript

mongodb

findoneandupdate