如何在mongodb的arraylist中添加字段答案

【问题标题】：How to add fields in array list in mongo db如何在mongodb的arraylist中添加字段
【发布时间】：2021-03-18 14:48:13
【问题描述】：

{
    "_id" : "1",
    "teams" : 
    [ 
        {
            "type" : "local",
            "isEnabled" : "true",
            "names" : 
            [ 
                { "name": "kumar","Nationality":"indian","BirthPlace":"Goa","Age":"U25" },
                { "name": "kannan","Nationality":"indian","BirthPlace":"Kerala","Age":"U25"}
            ]
        },
        {
            "type" : "national",
            "isEnabled" : "true",
            "names" : 
            [ 
                { "name": "kumar","Nationality":"indian","BirthPlace":"Goa","Age":"U25" },
                { "name": "kannan","Nationality":"indian","BirthPlace":"Kerala","Age":"U25"}
            ]
        },
        {
            "type" : "international",
            "isEnabled" : "true",
            "names" : 
            [ 
                { "name": "kumar","Nationality":"indian","BirthPlace":"Goa","Age":"U25" },
                { "name": "kannan","Nationality":"indian","BirthPlace":"Kerala","Age":"U25"}
            ]
        },
    ]
}

我在 mongodb 集合中有多个格式相同的文档。我想将以下行附加到 names 数组中，也仅适用于集合的每个文档中的“type：local”。我尝试了 $push 及其在所有团队数组中的附加，因为我发现难以添加此条件仅适用于 "type":"local"

{ “姓名”：“杰克”，“国籍”：“印度人”，“出生地”：“卡纳塔克邦”，“年龄”：“U25” }

【问题讨论】：

标签： arrays mongodb mongodb-query mongo-shell robo3t

【解决方案1】：

您可以使用positional operator : $[]

db.collection.update({
  "teams.type": "local"
},
{
  $push: {
    "teams.$[element].names": {
      "name": "jack",
      "Nationality": "indian",
      "BirthPlace": "Karnataka",
      "Age": "U25"
    }
  }
},
{
  arrayFilters: [
    {
      "element.type": "local"
    }
  ],
  multi: true
})

试试看here

【讨论】：

非常感谢 AlexisG。它节省了我的时间。
不客气。您可以将答案标记为已接受以“关闭”问题