Table of Contents
Last updated
January 19, 2019
Writing Queries
To the endpoint created send the following query in a graphql client like GraphiQL.
{
books{
isbn
title
}
}
You should be able to see the two books we loaded in the test.hello function.
Lets modify the QueryType to allow querying a book by isbn.
# Changes to graphql/query_type.rb
require 'graphql'
require_relative 'types/book'
require_relative '../models/book'
class QueryType < GraphQL::Schema::Object
# ...
# ...
field :book, Types::Book, null: true do
description 'Get a book by isbn'
argument :isbn, String, required: true
end
def book(isbn:)
Book.find(isbn: isbn)
end
# ...
If you query by isbn like below, you will get the correct book.
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