Chapter 2 - Validating Requests

[clairefro]

We need to make sure our API returns a 400 Bad Request error if a client makes a crazy request that doesn't match our schema, like:

POST /restaurants
with a Body of { "someCrazyProperty": "nonsense"}

We can enforce our OpenAPI schema on our fastify API using the plugin library fastify-openapi-glue

This library identifies each of our paths by their operationId in our schema.yaml, and converts them into fastify routes with the correct request methods. Better yet, the generated routes check each request to that route and make sure it fits our schema, or else it sends an error to the client!

API First makes life easy :)