README.md

update-device

Update the deviceId for users in your app who login using phoneNumber and deviceId.

Update deviceId flow in app

1. Your app calls the Graphcool mutation updateDevice(phoneNumber: String!, deviceId: String!, newDeviceId: String!)
2. If a user with the phoneNumber and deviceId combination is not found, an error is returned
3. If a user with the passed phoneNumber exists and deviceId matches, the user's deviceId field is updated to the new deviceId.
4. The mutation returns the id of the updated user

Setup the deviceId Update Function

• Create a new Schema Extension Function and paste the schema from schema-extension.graphql and code from update-device.js.
• add a PAT to the project called the same as your function. The token can be obtained from the Authentication tab in the project settings.

Test the Code

First, you need to create a new user with the signup function. Then, go to the Graphcool Playground:

graphcool playground

Run this mutation to change a user's deviceId:

mutation {
  # replace __PHONE_NUMBER__ , __OLD_DEVICE_ID__ , and __NEW_DEVICE_ID__
  updateDevice(phoneNumber: "__PHONE_NUMBER__", deviceId: "__OLD_DEVICE_ID__", newDeviceId: "__NEW_DEVICE_ID__") {
    id
  }
}

If the phoneNumber/newDeviceId combo are valid you should see that it updates the user's deviceId field and returns the user's id.