mongoose学习记录

 1 const mongoose = require('mongoose');
 2
 3 mongoose.connect('mongodb://localhost/playground')
 4   .then(() => console.log('数据库链接成功'))
 5   .catch(err => console.log(err, '数据库链接失败') );
 6
 7 // 创建集合规则
 8 const courseSchema =  new mongoose.Schema({
 9   name: String,
10   author: String,
11   isPublished: Boolean
12 });
13
14 // 使用规则创建集合  1.集合名称 2.集合规则
15 const Course = mongoose.model('Course', courseSchema);
16 // 创建文档
17 const course = new Course({
18   name: 'node.js基础',
19   author: '黑马讲师',
20   isPublished: true
21 });
22 // 将文档插入到数据库中
23 course.save();