MongoDB：使用其對象ID更新多維數組

Question

我正在使用Node.js和MongoDB開發恢復數據庫Web應用程序。我正在嘗試更新位於多維數組內的單個記錄。假如每個數組都有自己的對象ID，如何更新career_development字段中的單個數組？

{ 
    "_id": ObjectId("57f35a25983d521a90518efd"), 
    "email": "john.doe@gmail.com", 
    "first_name": "John", 
    "last_name": "Doe", 
    "created_at": ISODate("2016-10-04T07:28:37.407Z"), 
    "career_development": [ 
     { 
      "_id": ObjectId("5811aefcb7880316e4497406"), 
      "company_name": "TestCompanyName 1", 
      "company_location": "Texas, United States" 
     }, 
     { 
      "_id": ObjectId("5811afb7b7880316e4497407"), 
      "company_name": "TestCompanyName 2", 
      "company_location": "South Carolina, United States" 
     }, 
     { 
      "_id": ObjectId("5811afbfb7880316e4497408"), 
      "company_name": "TestCompanyName 3", 
      "company_location": "Florida, United States" 
     } 
    ] 
} 

Answer 1

使用$ positional operator與dot notation爲

db.collection.update(
    { "career_development._id": ObjectId("5811aefcb7880316e4497406") }, 
    { 
     "$set": { 
      "career_development.$.company_name": "TestCompanyName 1 Updated" 
     } 
    } 
); 

如果career_development是動態的，那麼你可以創建一個使用bracket notation作爲更新對象：

var dynamic_variable = posted_data.type, 
    query = {}, 
    updateObj = { "$set": { } }; 

query[dynamic_variable +"._id"] = ObjectId("5811aefcb7880316e4497406"); 
updateObj["$set"][dynamic_variable +".$.company_name"] = "TestCompanyName 1 Updated"; 
db.collection.update(query, updateObj) 

Answer 2

你是說數組看起來像這樣嗎？如果情況並非如此，我們可以使用elemMatch來獲取文檔，然後循環並更新它。讓我知道，我會在這裏發佈查詢。

"career_development": [ 
     { 
      "_id": ObjectId("5811aefcb7880316e4497406"), 
      "company_name": "TestCompanyName 1", 
      "company_location": "Texas, United States" 
     }, 
     { 
      "_id": ObjectId("5811afb7b7880316e4497407"), 
      "company_name": "TestCompanyName 2", 
      "company_location": "South Carolina, United States" 
     }, 
     { 
      "_id": ObjectId("5811afbfb7880316e4497408"), 
      "company_name": "TestCompanyName 3", 
      "company_location": "Florida, United States" 
     } 
    ], 
[ 
     { 
      "_id": ObjectId("5811aefcb7880316e4497406"), 
      "company_name": "TestCompanyName 1", 
      "company_location": "Texas, United States" 
     }, 
     { 
      "_id": ObjectId("5811afb7b7880316e4497407"), 
      "company_name": "TestCompanyName 2", 
      "company_location": "South Carolina, United States" 
     }, 
     { 
      "_id": ObjectId("5811afbfb7880316e4497408"), 
      "company_name": "TestCompanyName 3", 
      "company_location": "Florida, United States" 
     } 
    ]