Connect to REST endpoints with @connect

5. The @connect directive

Practice

Which of the following @connect directive parameters should you use to map the endpoint's specific JSON properties to your GraphQL schema?

httpsourceselectionjson

Use the REST API JSON response below to complete the code challenge.

REST API JSON response

{
  "id": "px-m012",
  "name": "Mraza",
  "mass": 6.42
}

HINT: @connect boilerplate code

@connect(
  source: ""
  http: { GET: "" }
  selection: """
  # TODO
  """
)

Code Challenge!

Add the @connect directive to the Query.popularPlanets field. Use the outerspace source and the API endpoint GET /planets?sort=popular. Refer to the JSON object above and the existing schema to define the selection.

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Key takeaways

The @connect directive describes how to get the data for a particular GraphQL field using a defined source.
Each root field (the fields on the Query and Mutation types) requires a @connect directive.
We use @connect's http parameter to define the HTTP method and URL parameters on the source that should be used to retrieve data for a field.
We use @connect's selection parameter to map the REST API's JSON response to our GraphQL fields.

Up next

We started small with just a couple of fields, but there's more to show! Let's add more fields and see what happens when our mapping doesn't quite match one-to-one.

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