Mongoose: findOneAndUpdate 미들웨어에 메시지가 포함되지 않은 게시물에서 ValidationError 반환

안녕하세요 @jeremyml입니다. 내가 말할 수 있는 바에 따르면 @vkarpov15 는 당신이 제안한 후크의 비동기 부분을 도운 것 같습니다. ValidationError에 대한 소스를 살펴본 후 모델의 인스턴스 대신 문자열을 제공하면 메시지가 'Validation failed'만 표시됩니다.

function ValidationError(instance) {
  this.errors = {};
  this._message = '';
  if (instance && instance.constructor.name === 'model') {
    this._message = instance.constructor.modelName + ' validation failed';
    MongooseError.call(this, this._message);
  } else {
    this._message = 'Validation failed';
    MongooseError.call(this, this._message);
  }
  this.name = 'ValidationError';
  if (Error.captureStackTrace) {
    Error.captureStackTrace(this);
  } else {
    this.stack = new Error().stack;
  }
  if (instance) {
    instance.errors = this.errors;
  }
}

Error 인스턴스와 함께 살 수 있다면 다음이 작동합니다.

#!/usr/bin/env node
'use strict'

const mongoose = require('../lib/test_db')
const Schema = mongoose.Schema

const testSchema = Schema({
  docField: String
})

testSchema.post('findOneAndUpdate', (result, next) => {
  let err = new Error('invalid docfield value')
  err.name = 'ValidationError'

  if (result.docField === 'invalidValue') {
    return next(err)
  }
})

const Test = mongoose.model('test', testSchema)

const test = new Test({
  docField: 'valid'
})

let savedDoc = test.save()
savedDoc.then(() => {
  Test.findOneAndUpdate({
    _id: test.id
  }, { docField: 'invalidValue' }, { runValidators: true, new: true }, (err, res) => {
    if (err) { return console.error(err) }
    console.log(res)
  })
})

산출:

InspiredMacPro:Help lineus$ ./mongoose5/6171/index.js 
{ ValidationError: invalid docfield value
    at Query.testSchema.post (/Users/lineus/dev/Help/mongoose5/6171/index.js:12:25)
    at callMiddlewareFunction (/Users/lineus/dev/Help/mongoose5/node_modules/kareem/index.js:399:23)
    at next (/Users/lineus/dev/Help/mongoose5/node_modules/kareem/index.js:193:9)
    at Kareem.execPost (/Users/lineus/dev/Help/mongoose5/node_modules/kareem/index.js:217:3)
    at _cb (/Users/lineus/dev/Help/mongoose5/node_modules/kareem/index.js:289:15)
    at _init (/Users/lineus/dev/Help/mongoose5/node_modules/mongoose/lib/query.js:2010:5)
    at model.Document.init (/Users/lineus/dev/Help/mongoose5/node_modules/mongoose/lib/document.js:370:5)
    at completeOne (/Users/lineus/dev/Help/mongoose5/node_modules/mongoose/lib/query.js:1996:12)
    at cb (/Users/lineus/dev/Help/mongoose5/node_modules/mongoose/lib/query.js:2368:14)
    at /Users/lineus/dev/Help/mongoose5/node_modules/mongoose/lib/query.js:2454:16
    at /Users/lineus/dev/Help/mongoose5/node_modules/mongoose/lib/utils.js:418:16
    at session.endSession (/Users/lineus/dev/Help/mongoose5/node_modules/mongodb/lib/utils.js:400:74)
    at ClientSession.endSession (/Users/lineus/dev/Help/mongoose5/node_modules/mongodb-core/lib/sessions.js:69:41)
    at args.push (/Users/lineus/dev/Help/mongoose5/node_modules/mongodb/lib/utils.js:397:17)
    at handleCallback (/Users/lineus/dev/Help/mongoose5/node_modules/mongodb/lib/utils.js:128:55)
    at /Users/lineus/dev/Help/mongoose5/node_modules/mongodb/lib/collection.js:2296:12 name: 'ValidationError' }
^C
InspiredMacPro:Help lineus$ 

@jeremyml 네 말이 맞아, 내 예가 틀렸어

schema.post('findOneAndUpdate', (result, next) =>{
  if (result.docField == 'invalidValue'){
    var validationError = new mongoose.Error.ValidationError(null);
    validationError.addError('docField', new mongoose.Error.ValidatorError({ message: 'Invalid' })); 
    return next(validationError);
  }
  // ...
});

ValidationError는 ValidatorError 인스턴스에 대한 경로 매핑이므로 다음 중 하나를 추가해야 합니다.