mongoose
1. const mongoose = require("mongoose");导入mongoose模块
2. //注意url地址最后面的地址是数据库的名称
const url = "mongodb://127.0.0.1:27017/bk1824";
3. mongoose.connect(url,(err)=>{
if(err){
console.log("链接失败")
}else{
console.log("链接成功")
}
})
4.
//存
const User = mongoose.model("user",{
username:String,
password:String
})
5. //增数据
const user = new User({
username:"zhao1234",
password:"12345"
})
6. //将增加的数据存入数据库的表中
user.save().then((res)=>{
console.log(res)
})
7. // 删除数据
User.remove({username:"zhao1234"}).then((res)=>{
console.log(res)
})
8. //改数据
User.update({username:"1111"},{$set:{username:"zhao"}}).then((res)=>{
console.log(res);
})
9.. // 查数据
User.find({username:"zhao"}).then((res)=>{
console.log(res);
})