Question

135

What is the best way to seed data in nodejs mongoose

rated 0 times [ 139] [ 4] / answers: 1 / hits: 18450 / 7 Years ago, thu, june 8, 2017, 12:00:00

I need to seed data into the database in my application. What is the best way to do that? Where should I write the code for seeding the data? what should be the folder structure for this?

I am a rails developer and rails framework has a nice way of seeding the data in seeds.rb, and I want to achieve the same thing in my node.js application.

Since I am new to node.js, I am confused between different available resources on the web.

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4 Years ago

answered 7 Years ago jennie · Accepted Answer

First create your model in models folder.

models/product.js

const mongoose = require(mongoose);

const productSchema = new mongoose.Schema({

  image: { type: String, required: true },

  title: { type: String, required: true },

  author: { type: String, required: true },

  description: { type: String, required: true },

  price: { type: Number, required: true }

});

const Product = mongoose.model(Product, productSchema);

module.exports = Product;

Then create a seeder folder
seeder/seedProducts.js

const Product = require(../models/product);

const mongoose = require(mongoose);

const dev = require(../config/dev); //get your mongoose string

//create your array. i inserted only 1 object here

const products = [   

  new Product({

    image:

      https://static.seattletimes.com/wp-content/uploads/2018/01/a8e801dc-f665-11e7-bf8f-ddd02ba4a187-780x1181.jpg,

    title: Origin,

    author: Dan Brown,

    description:

      2017 mystery thriller novel. Dan Brown is back with another thriller so moronic you can feel your IQ points flaking away like dandruff,

    price: 12

  }),]

//connect mongoose

mongoose

  .connect(String(dev.db), { useNewUrlParser: true })

  .catch(err => {

    console.log(err.stack);

    process.exit(1);

  })

  .then(() => {

    console.log(connected to db in development environment);

  });

//save your data. this is an async operation

//after you make sure you seeded all the products, disconnect automatically

products.map(async (p, index) => {

  await p.save((err, result) => {

    if (index === products.length - 1) {

      console.log(DONE!);

      mongoose.disconnect();

    }

  });

});

Finally you will run seedProducts.js on the terminal only once.

node seedProducts.js