graphql

graphql

Usage

This bootstrap operates under the following structure for implementing the graphql schema modularly:

• app/graphql/
  • index.js
  • scripts.js
  • module1
  • module2
  • ...modulex

Each module should be a folder containing the following:

• app/graphql/modulex/
  • type_defs.js (or schema.js)
  • resolvers.js
  • middlewares.js (add it if you need to use middlewares)

First steps

Installing node

Get the latest version of node from the official website or using nvm Nvm approach is preferred.

Getting dependencies

Run npm install or yarn from rootpath of the project.

Database configuration

Before running the app, make sure you have postgresql installed and a db created, to create it run the following steps inside a psql terminal:

1. CREATE DATABASE db_project_name;
2. \c db_project_name
3. CREATE ROLE "project_name" LOGIN CREATEDB PASSWORD 'project_name';

Then, set in .env some variables:

• DB_HOST=localhost
• DB_PORT=5432
• DB_USERNAME=project_name
• DB_PASSWORD=project_name
• DB_NAME=db_project_name
• DB_NAME_DEV=db_project_name_dev
• DB_NAME_TEST=db_project_name_test

Migrations

To create a migration, run ./node_modules/.bin/sequelize migration:create --name="my-migration-name" --config ./migrations/config.js --migrations-path ./migrations/migrations.

To run them, execute npm run migrations.

Starting your app

Now, to start your app run npm start in the rootpath of the project. Then access your app at localhost:port. The port is logged in the console where you ran the start script.

Development

Environments

By default, the environment will be development, but you can easily change it using the NODE_ENV environmental variable.

Environment variables

Dotenv is used for managing environment variables. They are stored in the /.env file. Take into account that the variables defined in the bashrc are not overrided.

The environment variables should be added to the .env file in the form of NAME=VALUE, as the following example:

DB_USERNAME=root
DB_PASS=superpass
DB_PASSWORD=superpass
PORT=8081
CLIENTS_API=http://api.clients.example.org/

Remember not to push nor commit the .env file.

Logging

To log useful information of your program to the console you just need to import the logger located at app/logger. There are two possible types of logging: info and error. You should use them depending on the type of message you want to show.

Here is an example snippet:

const logger = require('/app/logger');
...
if (error) { 
    logger.error('There is an error);
} else {
    logger.info('There is no error);
}

Testing

To run your tests you first need to config your testing database by setting the env var DB_NAME_TEST. as explained before in Database configuration. Also you need to run the migrations in this exclusive testing database each time you have new ones, you can do this by running the command npm run migrations-test. Once you have all the above done you can run your tests with the following command: npm test. For more information refeer to the documentation of Mocha and Chai.

Debugging

As we know, a NodeJS application is not something easy to debug and because of that we've added the --inspect flag to make it simpler. Chrome DevTools will get started when running your app using the start script (npm start), making your debugging easier.

REPL console

We can use a node console with npm run console. There your service objects are exposed as servicename + "Service". Let's suppose that we have a service users which has a function getAll. In your console you can call usersService.getAll() and see the result. Note that this works also with functions that return promises! To exit the console use .exit.

Documentation

Documentation will be served at /docs. Remember using dictum.js package to automatically generate documentation for your endpoints. Check this link for further details.

Deploy

Heroku

Pushing the desired branch to heroku should be enough. For more information check: https://devcenter.heroku.com/articles/getting-started-with-nodejs#define-a-procfile.

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Run the tests (npm test)
4. Commit your changes (git commit -am 'Add some feature')
5. Push to the branch (git push origin my-new-feature)
6. Create new Pull Request

About

This project is maintained by Wolox and it was written by Wolox.

License

graphql is available under the MIT license.

Copyright (c) 2019 Wolox

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.