猫鼬-使用findOneAndUpdate更新子文档

Question

我不知道特定的方法是否行不通。 findOneAndUpdate应该与子文档一起使用吗？

使用react / redux / express

路线：

  app.route("/api/positions/:position_id").put(function(req, res) {
const _id = req.params.position_id;
const update = req.body;
process.nextTick(function() {
  // for each element in req.body -> I will update the correct field
  Project.findOneAndUpdate({_id : _id}, update, { new: true }, function(
    err,
    updatedDoc
  ) {
    if (err)
      res.send(err);
    else if (!updatedDoc)
      res.json({ message: "No Position Found", _id });
    else {
      console.log(updatedDoc);
      res.json({
        message: "Update Successful",
        updatedDoc
      }); }
  });
});

}）;

邮递员退货：

{
  "message": "No Position Found",
  "_id": "58d1908861f3513dc0c85f7d"
}

但是子文档肯定存在于数据库中：

{
    "_id": {
        "$oid": "58c32c197f37c62a944f0ad2"
    },
    "name": "One",
    "phrase": "Two",
    "description": "Three",
    "userID": "58ac8e0ec1d5dc37043b8a7f",
    "open_positions": [
        {
            "position_title": "Master Chief",
            "position_description": "Superman chief",
            "position_tags": [
                "Healthcare",
                "Finance",
                "Consumer Products"
            ]
        },
        {
            "position_title": "Master Chief",
            "position_description": "Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor Lorem Ipsum Dolor ",
            "position_tags": [
                "Healthcare",
                "Finance",
                "Consumer Products",
                "Healthcare",
                "Finance",
                "Consumer Products",
                "Healthcare",
                "Finance",
                "Consumer Products"
            ]
        },
        {
            "position_description": "please join us we are the best",
            "_id": {
                "$oid": "58d18fb8b1f3272de8b89158"
            },
            "position_tags": [
                ""
            ]
        },
        {
            "position_description": "please join us we are the best",
            "_id": {
                "$oid": "58d18fc9d993233df4e52ace"
            },
            "position_tags": [
                ""
            ]
        },
        {
            "position_description": "please join us we are the best",
            "_id": {
                "$oid": "58d18fdcd993233df4e52acf"
            },
            "position_tags": [
                ""
            ]
        },
        {
            "position_title": "BEST POSITION",
            "position_description": "please join us we are the best",
            "_id": {
                "$oid": "58d18ffbd993233df4e52ad0"
            },
            "position_tags": [
                ""
            ]
        },
        {
            "position_title": "BEST POSITION",
            "position_description": "please join us we are the best",
            "_id": {
                "$oid": "58d1908861f3513dc0c85f7d"
            },
            "position_tags": [
                ""
            ]
        }
    ],
    "fields": [
        "Healthcare",
        "Finance",
        "Consumer Products"
    ],
    "skills": [],
    "dateAdded": {
        "$date": "2017-03-10T22:43:37.544Z"
    },
    "size": "2-5",
    "stage": "development",
    "visible": true,
    "__v": 5
}

我究竟做错了什么？

编辑：

如果有帮助，这是模式：

// schema for open positions in a project
var positionSchema = mongoose.Schema({
  position_title: String,
  position_description: String,
  position_tags: Array,
  archived: Boolean,
  archivedDate: Date
});

// schema for single project data
var projectSchema = mongoose.Schema({
  userID: String,
  name: String,
  phrase: String,
  visible: {
    type: Boolean,
    default: true
  },
  positions: Boolean,
  stage: {
    type: String,
    default: "Idea"
  },
  size: {
    type: String,
    default: "1"
  },
  members: String,
  dateAdded: {
    type: Date,
    default: Date.now
  },
  description: String,
  skills: Array,
  fields: {
    type: Array,
    default: ["Other"]
  },
  open_positions: [positionSchema],
  archived: Boolean,
  archivedDate: Date
});

// expose schema to app
module.exports = mongoose.model("Project", projectSchema);

Answer 1

您查询open_positions嵌入式数组内的_id字段。 因此，在查询部分中，您必须引用open_positions及其ID。

在查询部分中使用数组引用时，将获得占位符$位置运算符，该位置引用了匹配数组元素的索引，而在更新部分中，Mongo将$替换为先前找到的数组索引，然后将数组元素替换为update文档。

采用

Project.findOneAndUpdate({"open_positions._id" : _id}, { "open_positions.$" : update }, { new: true }....