mongoose扩展CURD方法

• model/user.js

const mongoose = require("./db");

const UserSchema = mongoose.Schema({
  name: {
    type: String,
    trim: true
  },
  age: Number,
  sn: {
    type: String,
    default: "123456",
    index: true //设置sn为索引
  },
  status: {
    type: Number,
    default: 1
  }
});

// 静态方法
UserSchema.statics.findBySn = function(sn, cb) {
  this.find({ sn }, cb);
};

// 实例方法
UserSchema.methods.print = function() {
  console.log(this);
};

const UserModel = mongoose.model("User", UserSchema, "user");

module.exports = UserModel;

• app.js

const UserModel = require("./model/user");

const user = new UserModel({
  name: "LittleFinger",
  age: 33,
  status: 1,
  sex: "男"
});

// 实例方法的调用
user.print();

// 静态方法的调用
UserModel.findBySn("123456", (err, docs) => {
  if (err) {
    console.log(err);
    return;
  }
  console.log(docs);
});