Question

无法使用异步函数updateCourse（id）更新数据，有帮助吗？我想通过id更新isPublished和author属性。

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/mongo-exercises')
.then(() => console.log('Connected to mongodb...'))
.catch(error => console.error('Connection failed to mongoDB...', error))

const courseSchema = new mongoose.Schema({
tags: [String],
date: Date,
name: String,
author: String,
isPublished: Boolean,
price: Number,

});

const Course = mongoose.model('Course', courseSchema);

async function updateCourse(id) {

const course = await Course.findById(id);
if (!course) return;

course.isPublished = true;
course.author = 'Author Author';

const result = await course.save();
console.log(result);
}

updateCourse('5a68fde3f09ad7646ddec17e');

Answer 1

从不带lean选项的查询中返回的文档是 MongooseDocuments ，而不是javascript纯对象。因此，您无法更新它们或使用 save（）

const course = await Course.findOne({ _id: id }).lean();
if (!course) return;
course.isPublished = true;
course.author = 'Author Author';
course.save()

为什么不使用findOneAndUpdate

const updatedCourse = await Course.findOneAndUpdate(
      { _id: id },
      { $set: { isPublished: true, author: 'Author Author' }  })

只需使用lean（）就可以了...

无法使用mongodb更新数据

1 个答案: