Simplify the way QueryTypeCreator is used

app/controllers/graphql_controller.rb

@@ -20,8 +20,8 @@ class GraphqlController < ApplicationController
   private
 
     def consul_schema
-      api_types = GraphQL::ApiTypesCreator.new(API_TYPE_DEFINITIONS).create
-      query_type = GraphQL::QueryTypeCreator.new(api_types).create
+      api_types  = GraphQL::ApiTypesCreator.new(API_TYPE_DEFINITIONS).create
+      query_type = GraphQL::QueryTypeCreator.create(api_types)
 
       GraphQL::Schema.define do
         query query_type

lib/graph_ql/query_type_creator.rb

@@ -3,20 +3,12 @@ require 'graphql'
 module GraphQL
   class QueryTypeCreator
 
-    attr_accessor :created_api_types
-
-    def initialize(created_api_types)
-      @created_api_types = created_api_types
-    end
-
-    def create
-      query_type_creator = self
-
+    def self.create(api_types)
       GraphQL::ObjectType.define do
         name 'QueryType'
         description 'The root query for the schema'
 
-        query_type_creator.created_api_types.each do |model, created_type|
+        api_types.each do |model, created_type|
           if created_type.fields['id']
             field model.graphql_field_name do
               type created_type

spec/lib/graph_ql/query_type_creator_spec.rb

@@ -7,19 +7,16 @@ describe GraphQL::QueryTypeCreator do
       Proposal => { fields: { id: :integer, title: :string } }
     }
   end
-  let(:api_types_creator) { GraphQL::ApiTypesCreator.new(api_type_definitions) }
-  let(:created_api_types) { api_types_creator.create }
-  let(:query_type_creator) { GraphQL::QueryTypeCreator.new(created_api_types) }
+  let(:api_types)  { GraphQL::ApiTypesCreator.new(api_type_definitions).create }
 
   describe "::create" do
-    let(:query_type) { query_type_creator.create }
+    let(:query_type) { GraphQL::QueryTypeCreator.create(api_types) }
 
     it 'creates a QueryType with fields to retrieve single objects whose model fields included an ID' do
       field = query_type.fields['proposal']
-      proposal_type = query_type_creator.created_api_types[Proposal]
 
       expect(field).to be_a(GraphQL::Field)
-      expect(field.type).to eq(proposal_type)
+      expect(field.type).to eq(api_types[Proposal])
       expect(field.name).to eq('proposal')
     end
 
@@ -29,10 +26,9 @@ describe GraphQL::QueryTypeCreator do
 
     it "creates a QueryType with connections to retrieve collections of objects" do
       connection = query_type.fields['proposals']
-      proposal_type = query_type_creator.created_api_types[Proposal]
 
       expect(connection).to be_a(GraphQL::Field)
-      expect(connection.type).to eq(proposal_type.connection_type)
+      expect(connection.type).to eq(api_types[Proposal].connection_type)
       expect(connection.name).to eq('proposals')
     end
   end

spec/lib/graphql_spec.rb

@@ -1,8 +1,7 @@
 require 'rails_helper'
 
-api_types = GraphQL::ApiTypesCreator.new(API_TYPE_DEFINITIONS).create
-query_type = GraphQL::QueryTypeCreator.new(api_types).create
-
+api_types  = GraphQL::ApiTypesCreator.new(API_TYPE_DEFINITIONS).create
+query_type = GraphQL::QueryTypeCreator.create(api_types)
 ConsulSchema = GraphQL::Schema.define do
   query query_type
   max_depth 12