使用Mongoose在MongoDB中按聚合層次結構進行$ match

Question

我嘗試使用and-regex $match以前由$graphLookup記錄聚合的$graphLookup 。

我已經在mongoldb外殼中對其進行了測試，並且可以正常工作！ 但是通過mongoose破壞了相同的查詢返回空集。

（免責聲明：它與我之前的問題重疊了， 如何在MongoDB中匹配聚合的（$ graphLookup）元素？但是偶爾我需要比match更靈活的方法，所以我決定再次詢問）

假設我有：

{ "_id": 1, "name": "Dev", final: false }
{ "_id": 2, "name": "Eliot", "reportsTo": "Dev", final: false }
{ "_id": 3, "name": "Ron", "reportsTo": "Eliot", final: false }
{ "_id": 4, "name": "Andrew", "reportsTo": "Eliot", final: false }
{ "_id": 5, "name": "Andron", "reportsTo": "Eliot", final: false }
{ "_id": 6, "name": "Asya", "reportsTo": "Ron", final: true }
{ "_id": 7, "name": "Dan", "reportsTo": "Andrew", final: true }
{ "_id": 8, "name": "Don", "reportsTo": "Andron", final: true }

按通話匯總

db.employees.aggregate([
  {$match: { final: true }},
  {$graphLookup: {
    from: "employees",
    startWith: "$reportsTo",
    connectFromField: "reportsTo",
    connectToField: "name",
    as: "reporters"
  }},
  {$match: ???}
])

我需要添加什么正則表達式匹配來實現此目的：

{"_id": 7, "name": "Dan", "reportsTo": "Andrew", final: true,
  "reporters": [
    { "_id": 1, "name": "Dev", final: false },
    { "_id": 2, "name": "Eliot", "reportsTo": "Dev", final: false },
    { "_id": 4, "name": "Andrew", "reportsTo": "Eliot", final: false }
  ]
},
{"_id": 8, "name": "Don", "reportsTo": "Andron", final: true,
  "reporters": [
    { "_id": 1, "name": "Dev", final: false },
    { "_id": 2, "name": "Eliot", "reportsTo": "Dev", final: false },
    { "_id": 5, "name": "Andron", "reportsTo": "Eliot", final: false }
  ]
}

正如我建議的那樣，由於我的情況限制（必須動態生成regex規則），因此必須通過應用$match-$and-$regex來正確解決，我無法准備斜線regex模式。

{$match: 
  {$and: [
    {"reporters.name": {$regex: 'Andr(?:ew|on)'}}, 
    {"reporters.name": {$regex: 'Eliot'}}
  ]}
}

Answer 1

它按預期工作。

db.employees.aggregate([
  {$match: { final: true }},
  {$graphLookup: {
    from: "employees",
    startWith: "$reportsTo",
    connectFromField: "reportsTo",
    connectToField: "name",
    as: "reporters"
  }},
  {$match: 
    {$and: [
      {"reporters.name": {$regex: 'Andr(?:ew|on)'}}, 
      {"reporters.name": {$regex: 'Eliot'}}
    ]}
  }
])