这是我的index.js文件：
const mongoose = require('mongoose');
mongoose.Promise = require('bluebird');
const Dishes = require('./models/dishes');
const url = 'mongodb://localhost:27017/conFusion';
const connect = mongoose.connect(url, {
useMongoClient: true
});
connect.then((db) => {
console.log('Connected correctly to server');
Dishes.create({
name: 'Uthappizza',
description: 'test'
})
.then((dish) => {
console.log(dish);
return Dishes.findByIdAndUpdate(dish._id, {
$set: { description: 'Updated test'}
},{
new: true
})
.exec();
})
.then((dish) => {
console.log(dish);
dish.comments.push({
rating: 5,
comment: 'I\'m getting a sinking feeling!',
author: 'Leonardo di Carpaccio'
});
return dish.save();
})
.then((dish) => {
console.log(dish);
return db.collection('dishes').drop();
})
.then(() => {
return db.close();
})
.catch((err) => {
console.log(err);
});
});
这是dishes.js文件：
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
var commentSchema = new Schema({
rating: {
type: Number,
min: 1,
max: 5,
required: true
},
comment: {
type: String,
required: true
},
author: {
type: String,
required: true
}
}, {
timestamps: true
});
var dishSchema = new Schema({
name: {
type: String,
required: true,
unique: true
},
description: {
type: String,
required: true
},
comments:[commentSchema]
}, {
timestamps: true
});
var Dishes = mongoose.model('Dish', dishSchema);
module.exports = Dishes;
但是出现以下错误：
> node-mongoose@1.0.0 start C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose
> node index
Connected correctly to server
{ __v: 0,
updatedAt: 2019-10-11T13:22:32.527Z,
createdAt: 2019-10-11T13:22:32.527Z,
name: 'Uthappizza',
description: 'test',
_id: 5da082181d223831f447b6a1,
comments: [] }
(node:12788) [DEP0079] DeprecationWarning: Custom inspection function on Objects via .inspect() is deprecated
{ _id: 5da082181d223831f447b6a1,
updatedAt: 2019-10-11T13:22:32.543Z,
createdAt: 2019-10-11T13:22:32.527Z,
name: 'Uthappizza',
description: 'Updated test',
__v: 0,
comments: [] }
{ MongoError: Unknown modifier: $pushAll
at Function.MongoError.create (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\error.js:31:11)
at toError (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb\lib\utils.js:139:22)
at C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb\lib\collection.js:1059:67
at C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\pool.js:469:18
at process._tickCallback (internal/process/next_tick.js:61:11)
name: 'MongoError',
message: 'Unknown modifier: $pushAll',
driver: true,
index: 0,
code: 9,
errmsg: 'Unknown modifier: $pushAll' }
Unhandled rejection MongoError: E11000 duplicate key error collection: conFusion.dishes index: name_1 dup key: { : "Vadonut" }
at Function.MongoError.create (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\error.js:31:11)
at C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\pool.js:497:72
at authenticateStragglers (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\pool.js:443:16)
at Connection.messageHandler (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\pool.js:477:5)
at Socket.<anonymous> (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\connection.js:331:22)
at Socket.emit (events.js:182:13)
at addChunk (_stream_readable.js:283:12)
at readableAddChunk (_stream_readable.js:264:11)
at Socket.Readable.push (_stream_readable.js:219:10)
at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)
我是NodeJS和MongoDB的新学习者，并且从教程视频中看到了此代码。我知道push方法已过时，但我不知道如何用新方法替换它来解决问题？我试图用concat方法替换它，但似乎出现错误。
编辑：我试图替换代码的以下行：
dish.comments.push([{
rating: 5,
comment: 'I\'m getting a sinking feeling!',
author: 'Leonardo di Carpaccio'
}]);
此行：
dish = dish.comments.concat([{
rating: 5,
comment: 'I\'m getting a sinking feeling!',
author: 'Leonardo di Carpaccio'
}]);
但仍然出现此错误：
> node-mongoose@1.0.0 start C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose
> node index
Connected correctly to server
{ __v: 0,
updatedAt: 2019-10-11T13:40:55.533Z,
createdAt: 2019-10-11T13:40:55.533Z,
name: 'Uthappizza',
description: 'test',
_id: 5da08667104e154a9c6cb0a1,
comments: [] }
(node:19100) [DEP0079] DeprecationWarning: Custom inspection function on Objects via .inspect() is deprecated
{ _id: 5da08667104e154a9c6cb0a1,
updatedAt: 2019-10-11T13:40:55.611Z,
createdAt: 2019-10-11T13:40:55.533Z,
name: 'Uthappizza',
description: 'Updated test',
__v: 0,
comments: [] }
TypeError: dish.save is not a function
at Dishes.create.then.then (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\index.js:38:21)
at tryCatcher (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\util.js:16:23)
at Promise._settlePromiseFromHandler (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\promise.js:512:31)
at Promise._settlePromise (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\promise.js:569:18)
at Promise._settlePromise0 (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\promise.js:614:10)
at Promise._settlePromises (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\promise.js:693:18)
at Async._drainQueue (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\async.js:133:16)
at Async._drainQueues (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\async.js:143:10)
at Immediate.Async.drainQueues [as _onImmediate] (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\bluebird\js\release\async.js:17:14)
at runCallback (timers.js:705:18)
at tryOnImmediate (timers.js:676:5)
at processImmediate (timers.js:658:5)
Unhandled rejection MongoError: E11000 duplicate key error collection: conFusion.dishes index: name_1 dup key: { : "Vadonut" }
at Function.MongoError.create (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\error.js:31:11)
at C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\pool.js:497:72
at authenticateStragglers (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\pool.js:443:16)
at Connection.messageHandler (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\pool.js:477:5)
at Socket.<anonymous> (C:\Users\m\Desktop\JS\NodeJS\Server-side-Development-with-NodeJS-Express-and-MongoDB-master\node-mongoose\node_modules\mongodb-core\lib\connection\connection.js:331:22)
at Socket.emit (events.js:182:13)
at addChunk (_stream_readable.js:283:12)
at readableAddChunk (_stream_readable.js:264:11)
at Socket.Readable.push (_stream_readable.js:219:10)
at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)