Question

我试图像关系数据库一样使用猫鼬。我有一个任务架构，需要引用客户端，用户和注释架构。

我发现了很多示例，这些示例可以用一个模式填充另一个模式，但是当我需要填充多个模式时，没有一个示例。我尝试了以下链接： https://mongoosejs.com/docs/populate.html http://ronaldroe.com/populating-multiple-fields-and-levels-with-mongoose/

findAll: function (req, res) {
    Task
      .find(req.query)
      .sort({ date: -1 })
      // populate associated user
      .populate("user", "_id firstName lastName")
      // populate associated client
      .populate("client", "_id name")
      // all notes for the task and when they were created
      .populate("note", "_id content created_at")
      .then(dbModel => {
        res.status(200).json({
          tasks: dbModel.map(model => {
            return {
              _id: model._id,
              user: model.user,
              client: model.client,
              assignDate: model.assignDate,
              assignedStatus: model.assignedStatus,
              completionStatus: model.completionStatus,
              description: model.description,
              note: model.note,
            };
          })
        })
      })
      .catch(err => res.status(422).json(err));
  }

当我对此数据进行GET请求时，我得到以下信息：

"tasks": [
        {
            "_id": "5d6980d8459a8b9f0e133d04",
            "user": [
                {
                    "_id": "5d6afd8a101f355244adfd9a",
                    "firstName": "Dexter",
                    "lastName": "Morgan"
                }
            ],
            "assignDate": "2018-12-09T00:00:00.000Z",
            "assignedStatus": "true",
            "completionStatus": "in-progress",
            "description": "This client needs to be contacted for future sales"
        }
]

我还希望获得客户端ID和名称以及与此任务相关的所有注释。

Answer 1

尝试以下代码：

findAll: function (req, res) {
    Task
      .find(req.query)
      .sort({ date: -1 })
      // populate associated user
      .populate({path : 'user' , select: '_id firstName lastName'}) 
      // populate associated client
      .populate({path : 'client' , select: '_id name'})
      // all notes for the task and when they were created
      .populate({path : 'note' , select : '_id content created_at'})
      .then(dbModel => {
        res.status(200).json({
          tasks: dbModel.map(model => {
            return {
              _id: model._id,
              user: model.user,
              client: model.client,
              assignDate: model.assignDate,
              assignedStatus: model.assignedStatus,
              completionStatus: model.completionStatus,
              description: model.description,
              note: model.note,
            };
          })
        })
      })
      .catch(err => res.status(422).json(err));
  }

猫鼬填充多个字段

1 个答案: