17-adding-a-mutation-on-server.md

Adding a Mutation on the Server

Aim: To Change the Brightness Level on a Light

Steps:

1. Update the schema to add a setBrightness mutation, taking an ID and an Int.

2. Create a setBrightness function which finds the Light with that ID and sets its brightnessLevel to the incoming parameter.

3. Your function should return the updated Light.

4. Test this in GraphiQL.