Question

我在尝试为单个文档设置虚拟时遇到问题。基本上我试图让我的文档保留我实际上并不想保存在数据库中的值。这是示例代码。

const mongoose = require('mongoose')
const Schema = mongoose.Schema;

const bookSchema = new Schema({
  title: String,
}, {
  toObject: { virtuals: true },
  toJSON: { virtuals: false }
})

bookSchema.virtual('desc').get(() => {
    return this.__desc
}).set((val) => {
    this.__desc = val
})

const bookModel = mongoose.model('book', bookSchema)

let first_book = new bookModel()
first_book.title = "desc should be first"
first_book.desc = "first"

console.log("FIRST BOOK", first_book,"\n","\n")

let second_book = new bookModel()
second_book.title = "desc should be second"
second_book.desc = "second"

console.log("FIRST BOOK AGAIN", first_book)

当我输出first_book时，我按预期得到desc: 'first'。但是，当我在设置second_book.desc = "second"后输出它时，由于某种原因，desc的{{1}}虚拟内容已更改。我似乎无法找到有关虚拟范围的任何文档，但我希望first_book保留first_book.desc。

我这样做错了吗？是否有另一种方法可以使文档保留在不属于数据库的数据中？

问题在Mongoose（node.js）中的文档之间设置虚拟

0 个答案: