Description

This is demo project which focus on graphql built into a rails server. Look at app/graphql/types/*_type.rb for currently available queries.

Also provides an UI for currency exchange rates.

Installation and starting the service

The service assumes that you export various ENV variables which are defined in env.template. However for easier setup the following approach is highly recommended:

• Duplicate env.template as env.development (for testing env.test)

• In your env.development set value for SQL_DATABASE (the name of the schema) and CURRENCYLAYER_ACCESS_KEY (access_key can be obtain by subscribing to basic (free) at https://currencylayer.com/)

Via docker and docker-compose

Assumes/recommends that you have installed docker and docker-compoes

• Run docker-compose up -d to start a postgres instance and a rails server

• Run docker-compose exec web bundle exec rails db:setup (or any other rails/ rake command you prefer to setup up the system)

On your system

Bundle and install the service as any other rails web server

Using the service

• For currency UI open http://localhost:3000/ in your browser (:warning: If seeds.rb is applied be aware that the values are fake ones for demonstration purpose)

• For graphql perform POST request to api/graphql (see also here for examples)

Daily currency updates

When running Via docker and docker-compose a cron service is also started which updates the currencies every day at 8:00 am CET.

In order to get current values it is also possible to run bundle exec rake currencylayer_import:daily (or ... currencylayer_importhistorical FROM=YYYY-MM-DD TO=YYYY-MM-DD)