问如何阻止数据库复制项目

EN

const mongoose = require("mongoose");
const Keys = require("../config/auth");

mongoose.set("useUnifiedTopology", true);
mongoose.set("useNewUrlParser", true);
mongoose.connect(Keys.MongoURI);

const products = [
  new Product({
    imagePath:
      "test",
    title: "test1",
    description: "test1",
    price: 20
  }),
  new Product({
    imagePath:
      "test2",
    title: "test2",
    description: "test2",
    price: 20
  })
];

let done = 0;
for (let i = 0; i < products.length; i++) {
  products[i].save(function(err, result) {
    done++;
    if (done === products.length) {
      exit();
    }
  });
}
function exit() {
  mongoose.disconnect();
}
console.log(products);