Example ruby graphql controller

QueriesController.rb

FloatAppSchema = GraphQL::Schema.define(
  query: QueryType,  // instance of GraphQL::ObjectType
  mutation: MutationType  //  instance of GraphQL::ObjectType
)

class QueriesController < ApplicationController
  include Skylight::Helpers
  
  def create
    query_string = params[:query]
    query_variables = params[:variables] || {}
    result = nil
    Skylight.instrument title: "FloatAppSchema.execute" do
      result = FloatAppSchema.execute(query_string, variables: query_variables, context: {current_user: current_user})
    end

    # Use OJ JSON encoder directly.
    # mode: :strict ensures that only basic JSON types are encoded, anything
    # ruby object related (which won't make sense to JavaScript) will raise an
    # exception.
    # escape_mode: :xss_safe provides an extra level of protection against XSS
    # attacks.
    render json: Oj.dump(result, mode: :strict, escape_mode: :xss_safe)
  end

end