Table of Contents
Last updated
January 9, 2019
GraphQL Queries
Add type, query and schema for graphql
Now we need to add a type for Speaker, also a query and a schema for GraphQL.
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| require 'graphql' | |
| require_relative 'base_object' | |
| class Types::Speaker < Types::BaseObject | |
| description 'Resembles a Speaker Object Type' | |
| field :id, ID, null: false | |
| field :name, String, null: false | |
| field :twitter_handle, String, null: true | |
| field :bio, String, null: true | |
| field :talk_title, String, null: true | |
| end |
We need to then add a root query in query.rb file.
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| require 'graphql' | |
| require_relative 'types/speaker' | |
| class QueryType < GraphQL::Schema::Object | |
| description "The query root of this schema" | |
| field :speakers, [Types::Speaker], null: false do | |
| description 'Get all speakers of the system' | |
| end | |
| def speakers | |
| Speaker.all | |
| end | |
| end |
And include the query in the schema.
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| require 'graphql' | |
| require_relative 'query' | |
| class ConferenceAppSchema < GraphQL::Schema | |
| query QueryType | |
| end |
Querying the endpoint
You can use the GraphiQL app or the Postman app to query the endpoint. Make sure that you have puma running and the server is up.
A JSON response like the below will be obtained.
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| { | |
| "data": { | |
| "speakers": [ | |
| { | |
| "name": "John", | |
| "twitterHandle": "johnruby", | |
| "bio": "This is John's bio" | |
| }, | |
| { | |
| "name": "Jacob", | |
| "twitterHandle": "jacob-ruby", | |
| "bio": "This is Jacob\\'s bio" | |
| } | |
| ] | |
| } | |
| } |
Now you have a GraphQL server up and running on sinatra, and you can query the endpoint to get a list of speakers with the fields defined in the GraphQL query.
In the next part we will add mutations.
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