Setting up GraphQL

Now we have a sinatra app that connects to the database and shows a list of speakers as a JSON response. Now let’s add graphql and define a schema for speakers.

Add the graphql gem.

Also the rack-contrib gem needs to be added so that the sinatra app can accept raw JSON payloads.

GraphQL works on a “schema” (basically something like a database schema), with the required models that needs to be queried or updated. So we need to define a schema.

The /graphql endpoint

We now need to have a POST endpoint for GraphQL.

GraphQL schema can be executed to give a GraphQL::Query::Result which can then be converted to JSON. app.rb needs change to include this endpoint.

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