Coding Tutorials Blog

merced-express - Express with a Ruby on Rails Feel

March 22, 2021

If you’ve ever used Ruby on Rails it provides many awesome benefits with its command-line interface:

  • The ability to quickly generate models, migrations and controllers
  • Pretty easy plug’n’play database integration
  • DB commands simplifying things like resetting and seeding the database

I really do enjoy these tools in rails, but I also really enjoy the flexibility and simplicity of Express when paired with a Mongo Database. So I took it upon myself to create an express-based framework that has a rails like feel and level of productivity. Enter, Merced-Express.

The best way to demonstrate is just to guide you in creating a quick project.

Creating a Todo App with Authentication

Generating the Project

Create a new project with the command npx create-merced-express todoapp

  • cd into the todoapp folder
  • run npm install

Configuring Settings

  • create a .env file in the project root and define the following
DATABASE_URL=mongodb://username:password@host/databasename
SECRET=secretforjwttokens
PORT=3000

make sure to use a mongoDB uri for a database you control.

Generating The Todo Model

Run the resource generator with npm run gen resource Todo

Let’s add some properties to our todo model in models/Todo.js

//----------------------------------------
      //  New Schema
      //----------------------------------------
      
      const TodoSchema = new Schema({
        subject: String
      }, { timestamps: true });
  • If you notice all the routes are already all set in the TodoController in the controllers folder and it has already been registered as a router with the HomeController.

Adding Authentication

Let’s scaffold out the authentication files with the command npm run gen auth

All the authentication files have been created. All we need to do now is wire the auth middleware to the TodoController

     //----------------------------------------
     //  Import Dependencies
     //----------------------------------------
     import { Router } from "express";
     import Todo from "../models/Todo.js";
     import auth from "../config/auth.js"
     
     //----------------------------------------
     //  Create Router
     //----------------------------------------
     const TodoRouter = Router();

     //----------------------------------------
     //  Router Middleware
     //----------------------------------------
     TodoRouter.use(auth)
     

Testing

Run the app and you should be able to do the following:

  • create a new user with a post request to /user/create (username and password in request body)
  • login and receive a token with a post request to /user/login (username and password in request body)

Now we can make requests to all our todo routes as long as we have the token in our header in bearer form.

"Authorization":"bearer <token>"

your token should replace the <token>, no angle brackets should be in the header

Now you can make all your CRUD requests…

index => get request to /todo
show => get request to /todo/:id
create => post request to /todo
update => put request to /todo/:id
destroy => delete request to /todo/:id

That’s it!

In a few commands, you have built a full crud API with authentication with fully customizable code. Enjoy! Tell Your Friends!


© AlexMercedCoder.com 2020