Mongoose：时间戳不适用于子文档

Question

我想为我的子文档添加时间戳，但我的 reponses 数组不包含任何时间戳。

我的模特：

const forumSchema = new Schema(
  {
    user: { type: mongoose.Schema.Types.ObjectId, ref: "User" },
    title: { type: String, required: true },
    content: { type: String, required: true },
    like: [{ type: mongoose.Schema.Types.ObjectId, ref: "User" }],
    reponses: [
      {
        user: { type: mongoose.Schema.Types.ObjectId, ref: "User" },
        content: { type: String, required: true },
        like: [{ type: mongoose.Schema.Types.ObjectId, ref: "User" }],
      },
//does not work
      {
        timestamps: true,
      },
    ],
    slug: { type: String, required: true },
  },
//this one works
  {
    timestamps: true,
  }
);

当我想添加响应时，我看不到任何时间戳

  Forum.findOneAndUpdate({ _id: req.params.id }, { $push: data }, { new: true }, (err, question) => {
      if (err) {
        res.status(404).send(err);
      } else {
        res.send(question);
      }
    });

我没有收到任何错误，并且我的文档已按预期更新。

请问我错过了什么？

Answer 1

您必须为响应定义一个单独的架构，然后在您的主架构中使用，

const responsesSchema = new Schema(
  {
    user: { type: mongoose.Schema.Types.ObjectId, ref: "User" },
    content: { type: String, required: true },
    like: [{ type: mongoose.Schema.Types.ObjectId, ref: "User" }]
  }, 
  {
    timestamps: true
  }
);

在你的架构中使用它，

const forumSchema = new Schema(
  {
    user: { type: mongoose.Schema.Types.ObjectId, ref: "User" },
    title: { type: String, required: true },
    content: { type: String, required: true },
    like: [{ type: mongoose.Schema.Types.ObjectId, ref: "User" }],
    reponses: {
      type: [responsesSchema]
    },
    slug: { type: String, required: true }
  },
  {
    timestamps: true
  }
);