GraphQL-Server

GraphQL Server with custom endpoint.

This configuration is using graphql-yoga.

graphql-yoga is a fully-featured GraphQL Server with focus on easy setup, performance & great developer experience.

The great thing about graphql-yoga is the fact that it comes with a playground client to run queries and mutations on the browser.

Configuring the GraphQL server

We will be using this server to fetch weather data from a REST API. But the endpoint can be changed to retrieve data from any REST API.

• Clone this repo to your local machine.

git clone https://github.com/jtaylor1989/GraphQL-Server.git

cd GraphQL-Server

Running the application

• Install client dependencies.

yarn

# or

npm install

• Launch the localhost.

npm start

You can now navigate to: http://localhost:4000/ and start using the Playground Client by running queries following the GraphQL schema defined in src/graphql.schema in this project folder.

Example: running a GraphQL query to fetch weather data.

Copy and paste the following query to get the weather forecast for the city of Paris for the next days.

{
  getForecast(woeid: 615702) {
    title
    timezone
    consolidated_weather {
      applicable_date
      weather_state_name
      the_temp
      min_temp
      max_temp
      wind_speed
      humidity
      visibility
      air_pressure
    }
  }
}

You should see the following results.

Now this GraphQL server is ready to be integrated with a GraphQL Client of your choice. You only need to pass the url endpoint to your client.

For more info, check the following repo to see how to connect this back end to a React Native app using the Apollo GraphQL Client.