如何在mongo db对象中更新嵌入对象

Question

架构是这样的

{
   "_id":ObjectId('5aaa41f96f69440f82ef45a7')
   "name":"test",
   "password" : "1234",
   "userInfo" : {
     "userName" : "usha",
     "organization" : [1,2]
}

}

如果我正在使用这样的查询，那么它将替换userInfo对象，而不是更新它。

db.user.update({"_id":ObjectId('5aaa41f96f69440f82ef45a7')},{$set :{"userInfo":{"userName":"kanha"}}})
after using this query it is giving this result

{
   "_id":ObjectId('5aaa41f96f69440f82ef45a7')
   "name":"test",
   "password" : "1234",
   "userInfo" : {
     "userName" : "kanha"
}

}

它正在从userInfo

中删除组织

预期结果

{
   "_id":ObjectId('5aaa41f96f69440f82ef45a7')
   "name":"test",
   "password" : "1234",
   "userInfo" : {
     "userName" : "kanha",
     "organization" : [1,2]
}

}

Answer 1

你可以尝试

db.user.update({'_id':ObjectId('5aaa41f96f69440f82ef45a7')}, {$set:
  {
    'userInfo.$.userName': 'kanha'
  }
});

Answer 2

db.users.update({_id: '5aaa41f96f69440f82ef45a7'}, { '$set': {"userInfo.$.userName" : 'usha'})

它也适用于嵌套数组。