MongoDB-貓鼬查詢findOneAndUpdate（）不更新/復制數據庫

Question

我正在嘗試保存和更新findOneAndUpdate() （ {upsert: true} -如果該對象不存在，則創建該對象）Web Api的結果，該Web Api包含多個數據數組以填充股票圖表。 每次輸入符號並單擊“獲取報價”按鈕，它都應從Web api獲取數據，然后在數據庫的“子模式”下保存/更新它。 我該如何使用nodejs和mongoose？ 這是我嘗試過的代碼。

文件夾-模型-Stock.js

const mongoose = require('mongoose')
mongoose.Promise = global.Promise
mongoose.connect('mongodb://localhost:27017/myapp', { useNewUrlParser: true })
const slug = require('slug')


const childSchemaData = new mongoose.Schema({
  date: mongoose.Decimal128,
  open: mongoose.Decimal128,
  high: mongoose.Decimal128,
  low: mongoose.Decimal128,
  close: mongoose.Decimal128,
  volume: mongoose.Decimal128
})

const parentSchemaSymbol = new mongoose.Schema({
  symbol: {
    type: String,
    trim: true,
    minlength: 2,
    maxlength: 4,
    required: 'Plese enter a valid symbol, min 2 characters and max 4'
  },
  // Array of subdocuments
  data: [childSchemaData],
  slug: String

});

//we have to PRE-save slug before save the parentSchemaSymbol into DB
parentSchemaSymbol.pre('save', function (next) {
  if (!this.isModified('symbol')) {
    next()//skip it
    return//stop this function from running
  }
  this.slug = slug(this.symbol)
  next()
  //TODO make more resiliant soslug are unique
})

module.exports = mongoose.model('Stock', parentSchemaSymbol)

控制器-webApiController.js

const mongoose = require('mongoose')
const axios = require('axios')

require('../models/Stock')
const parentSchemaSymbol = mongoose.model('Stock')



mongoose.Promise = global.Promise // Tell Mongoose to use ES6 promises
// Connect to our Database and handle any bad connections
mongoose.connect('mongodb://localhost:27017/myapp', { useNewUrlParser: true })
mongoose.connection.on('error', (err) => {
  console.error(`🙅 🚫 🙅 🚫 🙅 🚫 🙅 🚫 → ${err.message}`)
})

exports.webApi = (req, res) => {
  let curValue = req.params.symbol

  axios.get(`https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=${curValue}&outputsize=compact&apikey=TUVR`)
    .then(response => {
      return highLow = Object.keys(response.data['Time Series (Daily)']).map(date => {
        return {
          date: Date.parse(date),
          open: Math.round(parseFloat(response.data['Time Series (Daily)'][date]['1. open']) * 100) / 100,
          high: Math.round(parseFloat(response.data['Time Series (Daily)'][date]['2. high']) * 100) / 100,
          low: Math.round(parseFloat(response.data['Time Series (Daily)'][date]['3. low']) * 100) / 100,
          close: Math.round(parseFloat(response.data['Time Series (Daily)'][date]['4. close']) * 100) / 100,
          volume: parseInt(response.data['Time Series (Daily)'][date]['5. volume'])
        }
      })

    })
    .then(_ => {

      let curValueSchema = new parentSchemaSymbol()

      curValueSchema.symbol = curValue
      highLow.map(item => {
        curValueSchema.data.push(item)
      })
      const query = { symbol: `${curValue.toUpperCase()}` }
      const update = { $addToSet: { data: [curValueSchema.data] } }
      const options = { upsert: true, new: true }
      curValueSchema.findOneAndUpdate(query, update, options).then(doc => {
        console.log('Saved the symbol', doc)
        return res.send(highLow)
      }).catch(e => {
        console.log(e)
      })
    })
    .catch(error => {
      console.log(error)
    })
}

這是我要修復的代碼。 其余的工作：

 let curValueSchema = new parentSchemaSymbol()

      curValueSchema.symbol = curValue
      highLow.map(item => {
        curValueSchema.data.push(item)
      })
      const query = { symbol: `${curValue.toUpperCase()}` }
      const update = curValueSchema
      const options = { upsert: true, new: true }
      curValueSchema.findOneAndUpdate(query, update, options).then(doc => {
        console.log('Saved the symbol', doc)
        return res.send(highLow)
      }).catch(e => {
        console.log(e)
      })

這是我得到的錯誤

TypeError: curValueSchema.findOneAndUpdate is not a function
    at axios.get.then.then._ (/mnt/c/Users/john/Desktop/node/controllers/webApiController.js:55:22)
    at process._tickCallback (internal/process/next_tick.js:178:7)

這是數據= highLow

解

因為默認情況下，Mongoose每次傳遞一個Javascript對象來更新文檔字段時，都會默認創建一個新的MongoDB ObjectId（此隱藏的_id字段）。

要遍歷，可以通過確保您的貓鼬模式如下來告訴Mongoose不要創建新的ObjectId：

文件夾-模型-Stock.js

const mongoose = require('mongoose')
mongoose.Promise = global.Promise
mongoose.connect('mongodb://localhost:27017/myapp', { useNewUrlParser: true })
const slug = require('slug')


const childSchemaData = new mongoose.Schema({
  "_id": false,
  date: mongoose.Decimal128,
  open: mongoose.Decimal128,
  high: mongoose.Decimal128,
  low: mongoose.Decimal128,
  close: mongoose.Decimal128,
  volume: mongoose.Decimal128
})

const parentSchemaSymbol = new mongoose.Schema({
  "_id": false,
  symbol: {
    type: String,
    trim: true,
    minlength: 2,
    maxlength: 4,
    required: 'Plese enter a valid symbol, min 2 characters and max 4'
  },
  // Array of subdocuments
  data: [childSchemaData],
  slug: String

});

//we have to PRE-save slug before save the parentSchemaSymbol into DB
parentSchemaSymbol.pre('save', function (next) {
  if (!this.isModified('symbol')) {
    next()//skip it
    return//stop this function from running
  }
  this.slug = slug(this.symbol)
  next()
  //TODO make more resiliant soslug are unique
})

module.exports = mongoose.model('Stock', parentSchemaSymbol)

控制器-webApiController.js

let curValueSchema = new parentSchemaSymbol()

      curValueSchema.symbol = curValue
      highLow.map(item => {
        curValueSchema.data.push(item)
      })
      const query = { symbol: `${curValue.toUpperCase()}` }
      const update = curValueSchema
      const options = { upsert: true, new: true }
      parentSchemaSymbol.findOneAndUpdate(query, update, options).then(doc => {
        console.log('Saved the symbol', doc)
        return res.send(highLow)
      }).catch(e => {
        console.log(e)
      })

Answer 1

代替：

curValueSchema.findOneAndUpdate

做：

parentSchemaSymbol.findOneAndUpdate

Answer 2

這是模型的方法，而不是實例。 用方案名稱替換實例名稱。

Answer 3

1. findOneAndUpdate和update是一種模型方法，可用於模型實例，因此您將得到方法未找到錯誤。

 let curValueSchema = new parentSchemaSymbol() curValueSchema.symbol = curValue highLow.map(item = > { curValueSchema.data.push(item) }) const query = { symbol: `$ { curValue.toUpperCase() }` } const update = curValueSchema const options = { upsert: true, new: true } parentSchemaSymbol.findOneAndUpdate(query, update, options).then(doc = > { console.log('Saved the symbol', doc) return res.send(highLow) }). catch (e = > { console.log(e) })