[英]Unable to save message ID in user Object (Mongoose)
我的目標是使用Mongoose將消息推送到用戶對象的messages屬性(它是一個數組)中。 但是,嘗試保存用戶(user.save())時出現錯誤。 我在下面的代碼上做了這三個console.logs,看出了什么問題。 有人可以解決這個問題嗎?
console.log(user.messages);
user.messages.push(result._id);
console.log(user.messages)
user.save(function (err, result) {
console.log(err)
});
因此,在我將消息推送到數組中之前,一個在緊隨其后,一個在嘗試保存用戶后檢查錯誤。 這給了我以下日志:
首先,一個空數組[]
第二,包含消息ID的數組
["5a5cdd894504771c80c8901a"]
第三,為什么不能正確保存用戶的錯誤:
{ MongoError: Unknown modifier: $pushAll
at Function.MongoError.create (C:\Users\TijlD\Desktop\projects\03 MongoDB\node_modules\mongodb-core\lib\error.js:31:11)
at toError (C:\Users\TijlD\Desktop\projects\03 MongoDB\node_modules\mongodb\lib\utils.js:139:22)
at C:\Users\TijlD\Desktop\projects\03 MongoDB\node_modules\mongodb\lib\collection.js:1059:67
at C:\Users\TijlD\Desktop\projects\03 MongoDB\node_modules\mongodb-core\lib\connection\pool.js:469:18
at process._tickCallback (internal/process/next_tick.js:150:11)
name: 'MongoError',
message: 'Unknown modifier: $pushAll',
driver: true,
index: 0,
code: 9,
errmsg: 'Unknown modifier: $pushAll' }
這是服務器端的代碼(node.js)
router.post('/', function (req,res,next){
// We stored the user in the token so we can retrieve it from this token.
// fetch the user (in the token) who reached this route
// we use the jwt package to decode the token ( we wont be able to grab the user if we skip this step)
// the decode method does not check if the token is valid, this happens
// higher up in this file. we only decode it to grab the user. If we hadn't
// protected our route we wouldve had to use a different strategy (.verify method)
var decoded = jwt.decode(req.query.token);
User.findById(decoded.user._id, function(err, user){
if (err) {
return res.status(500).json({
title: 'An error occurred',
error: err
});
}
var message = new Message({
content: req.body.content,
user: user._id
});
message.save(function(err, result) {
if (err) {
return res.status(500).json({
title: 'An error occurred',
error: err
});
}
console.log(user.messages);
user.messages.push(result._id);
console.log(user.messages)
user.save(function (err, result) {
console.log(err)
});
res.status(201).json({
message: 'Saved message',
// this object is what we'll receive in the front-end
// and what we'll convert using the response.json() method
obj: result
});
});
});
});
這是用戶模型
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var mongooseUniqueValidator = require('mongoose-unique-validator');
var schema = new Schema({
firstName: {type: String, required: true},
lastName: {type: String, required: true},
password: {type: String, required: true},
email: {type: String, required: true, unique: true},
messages: [{type: Schema.Types.ObjectId, ref: 'Message'}]
});
schema.plugin(mongooseUniqueValidator);
module.exports = mongoose.model('User', schema);
根據此問題 ,已棄用$pushAll
,可以通過在模式選項中設置{ usePushEach: true }
來解決此問題。
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var mongooseUniqueValidator = require('mongoose-unique-validator');
var schema = new Schema({
firstName: {type: String, required: true},
lastName: {type: String, required: true},
password: {type: String, required: true},
email: {type: String, required: true, unique: true},
messages: [{type: Schema.Types.ObjectId, ref: 'Message'}]
}, { usePushEach: true });
schema.plugin(mongooseUniqueValidator);
module.exports = mongoose.model('User', schema);
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.