如何定义mongoose模式，为其嵌入式文档设置相同的模型和类型。

Question

假设我正在创建一个名为'评论'的模型，但评论模型的回复字段应该是'评论'类型。这可能吗？如果可以，请帮助我

const commentSchema = new mongoose.Schema({
  comment: {
    type: String,
    required: true
  },
  author: {
    type: mongoose.Schema.Types.ObjectId,
    required: true
  },
  reply: {
    type: [Comments]
  }
},
  {
    timestamps: true
  })

const Comments = mongoose.model('Comment', commentSchema)
module.exports = Comments

Answer 1

你可以使用 this 以供自我参考。

 const commentSchema = new mongoose.Schema({
  comment: {
    type: String,
    required: true
  },
  author: {
    type: mongoose.Schema.Types.ObjectId,
    required: true
  },
  reply: {
    type: [this]
  }
},
  {
    timestamps: true
  })

const Comments = mongoose.model('Comment', commentSchema)
module.exports = Comments