node.js - 无法将数据推送/更新到现有的 mongo 对象中

Question

我有一个用户对象，其中包含几个数组，如下所示:

{
  _id: "5b90a261ff3712000495ca29", 
  name: "Udit", 
  email: "guru.udit@bmail.com", 
  password: "sjsndj",
  education:[],
  professionalexp:[],
  projects:[],
  skills:[]
}

我正在使用 Express API 将数据通过某个对象推送到教育数组中，以下是我尝试更新 mongo 数据的代码。当我尝试推送和更新数据时，我没有看到任何响应。我应该如何处理并一次推送数组或多个数组？

app.put("/api/updatefield/", function(req, res) {
  User.update(
    { _id: req.body._id },
    {
      $push: {
        "education.$.University": "something that is there"
      }
    },
    function(err, result) {
      if (err) {
        res.send(err);
      }
      if (result) {
        res.json(result);
      }
    }
  );
});

也供引用，这是我通过 API 正文推送的数据，我在其余服务器上的 req.body 中获取该数据

{
    "summary": "some summary",
    "education": [
        {
            "name": "Institue",
            "from": "19/07/2018",
            "to": "30/07/2018"
        }
    ],
    "professional": [
        {
            "name": "Company",
            "from": "19/07/2018",
            "to": "30/07/2018"
        }
    ],
    "cardCount": 1,
    "cardCount2": 1
}

Answer 1

你可以这样做:

User.update({_id: ObjectId("5b910b0acb5b7646e630cefe")}, {
    $push: {
        "education": {
            "summary": "some summary",
            "education": [{"name": "Institue", "from": "19/07/2018", "to": "30/07/2018"}],
            "professional": [{"name": "Company", "from": "19/07/2018", "to": "30/07/2018"}],
            "cardCount": 1, "cardCount2": 1
        }
    }
})

对于多个对象:

User.update({_id: ObjectId("5b910b0acb5b7646e630cefe")}, {
    $push: {
        "education": {
            $each: [{
                "summary": "some summary",
                "education": [{"name": "Institue", "from": "19/07/2018", "to": "30/07/2018"}],
                "professional": [{"name": "Company", "from": "19/07/2018", "to": "30/07/2018"}],
                "cardCount": 1, "cardCount2": 1
            }, {"a": 2}]
        }    
    }
})

对于插入多个对象:

User.update({_id: ObjectId("5b910b0acb5b7646e630cefe")}, {
        $push: {
            "education": {
                $each: [{
                    "summary": "some summary",
                    "education": [{"name": "Institue", "from": "19/07/2018", "to": "30/07/2018"}],
                    "professional": [{"name": "Company", "from": "19/07/2018", "to": "30/07/2018"}],
                    "cardCount": 1, "cardCount2": 1
                }, {"a": 2}]
            },
           "professionalexp" : {"a":2}
        }
    })