initialize rails api app with graphql setup

Gemfile

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+source 'https://rubygems.org'
+
+git_source(:github) do |repo_name|
+  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
+  "https://github.com/#{repo_name}.git"
+end
+
+
+# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
+gem 'rails', '~> 5.1.4'
+# Use sqlite3 as the database for Active Record
+gem 'sqlite3'
+# Use Puma as the app server
+gem 'puma', '~> 3.7'
+# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
+# gem 'jbuilder', '~> 2.5'
+# Use Redis adapter to run Action Cable in production
+# gem 'redis', '~> 3.0'
+# Use ActiveModel has_secure_password
+# gem 'bcrypt', '~> 3.1.7'
+
+gem 'graphql'
+gem 'graphiql-rails'
+
+# Use Capistrano for deployment
+# gem 'capistrano-rails', group: :development
+
+# Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
+# gem 'rack-cors'
+
+group :development, :test do
+  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
+  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+end
+
+group :development do
+  gem 'coffee-rails'
+  gem 'sass-rails'
+  gem 'uglifier'
+  gem 'listen', '>= 3.0.5', '< 3.2'
+  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
+  gem 'spring'
+  gem 'spring-watcher-listen', '~> 2.0.0'
+end
+
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (5.1.4)
+      actionpack (= 5.1.4)
+      nio4r (~> 2.0)
+      websocket-driver (~> 0.6.1)
+    actionmailer (5.1.4)
+      actionpack (= 5.1.4)
+      actionview (= 5.1.4)
+      activejob (= 5.1.4)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.1.4)
+      actionview (= 5.1.4)
+      activesupport (= 5.1.4)
+      rack (~> 2.0)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (5.1.4)
+      activesupport (= 5.1.4)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activejob (5.1.4)
+      activesupport (= 5.1.4)
+      globalid (>= 0.3.6)
+    activemodel (5.1.4)
+      activesupport (= 5.1.4)
+    activerecord (5.1.4)
+      activemodel (= 5.1.4)
+      activesupport (= 5.1.4)
+      arel (~> 8.0)
+    activesupport (5.1.4)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (~> 0.7)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    arel (8.0.0)
+    builder (3.2.3)
+    byebug (9.1.0)
+    coffee-rails (4.2.2)
+      coffee-script (>= 2.2.0)
+      railties (>= 4.0.0)
+    coffee-script (2.4.1)
+      coffee-script-source
+      execjs
+    coffee-script-source (1.12.2)
+    concurrent-ruby (1.0.5)
+    crass (1.0.2)
+    erubi (1.7.0)
+    execjs (2.7.0)
+    ffi (1.9.18)
+    globalid (0.4.1)
+      activesupport (>= 4.2.0)
+    graphiql-rails (1.4.5)
+      rails
+    graphql (1.7.4)
+    i18n (0.9.0)
+      concurrent-ruby (~> 1.0)
+    listen (3.1.1)
+      rb-fsevent (>= 0.9.3)
+      rb-inotify (>= 0.9.7)
+    loofah (2.1.1)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.5.9)
+    mail (2.6.6)
+      mime-types (>= 1.16, < 4)
+    method_source (0.9.0)
+    mime-types (3.1)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0521)
+    mini_portile2 (2.3.0)
+    minitest (5.10.3)
+    nio4r (2.1.0)
+    nokogiri (1.8.1)
+      mini_portile2 (~> 2.3.0)
+    puma (3.10.0)
+    rack (2.0.3)
+    rack-test (0.7.0)
+      rack (>= 1.0, < 3)
+    rails (5.1.4)
+      actioncable (= 5.1.4)
+      actionmailer (= 5.1.4)
+      actionpack (= 5.1.4)
+      actionview (= 5.1.4)
+      activejob (= 5.1.4)
+      activemodel (= 5.1.4)
+      activerecord (= 5.1.4)
+      activesupport (= 5.1.4)
+      bundler (>= 1.3.0)
+      railties (= 5.1.4)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.0.3)
+      loofah (~> 2.0)
+    railties (5.1.4)
+      actionpack (= 5.1.4)
+      activesupport (= 5.1.4)
+      method_source
+      rake (>= 0.8.7)
+      thor (>= 0.18.1, < 2.0)
+    rake (12.2.1)
+    rb-fsevent (0.10.2)
+    rb-inotify (0.9.10)
+      ffi (>= 0.5.0, < 2)
+    sass (3.5.3)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    sass-rails (5.0.6)
+      railties (>= 4.0.0, < 6)
+      sass (~> 3.1)
+      sprockets (>= 2.8, < 4.0)
+      sprockets-rails (>= 2.0, < 4.0)
+      tilt (>= 1.1, < 3)
+    spring (2.0.2)
+      activesupport (>= 4.2)
+    spring-watcher-listen (2.0.1)
+      listen (>= 2.7, < 4.0)
+      spring (>= 1.2, < 3.0)
+    sprockets (3.7.1)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.1)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
+    sqlite3 (1.3.13)
+    thor (0.20.0)
+    thread_safe (0.3.6)
+    tilt (2.0.8)
+    tzinfo (1.2.4)
+      thread_safe (~> 0.1)
+    uglifier (3.2.0)
+      execjs (>= 0.3.0, < 3)
+    websocket-driver (0.6.5)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  byebug
+  coffee-rails
+  graphiql-rails
+  graphql
+  listen (>= 3.0.5, < 3.2)
+  puma (~> 3.7)
+  rails (~> 5.1.4)
+  sass-rails
+  spring
+  spring-watcher-listen (~> 2.0.0)
+  sqlite3
+  tzinfo-data
+  uglifier
+
+BUNDLED WITH
+   1.15.4

README.md

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+# README
+
+This README would normally document whatever steps are necessary to get the
+application up and running.
+
+Things you may want to cover:
+
+* Ruby version
+
+* System dependencies
+
+* Configuration
+
+* Database creation
+
+* Database initialization
+
+* How to run the test suite
+
+* Services (job queues, cache servers, search engines, etc.)
+
+* Deployment instructions
+
+* ...

Rakefile

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+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require_relative 'config/application'
+
+Rails.application.load_tasks

app/channels/application_cable/channel.rb

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+module ApplicationCable
+  class Channel < ActionCable::Channel::Base
+  end
+end

app/channels/application_cable/connection.rb

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+module ApplicationCable
+  class Connection < ActionCable::Connection::Base
+  end
+end

app/controllers/application_controller.rb

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+class ApplicationController < ActionController::API
+end

app/controllers/graphql_controller.rb

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+class GraphqlController < ApplicationController
+  def execute
+    variables = ensure_hash(params[:variables])
+    query = params[:query]
+    operation_name = params[:operationName]
+    context = {
+      # Query context goes here, for example:
+      # current_user: current_user,
+    }
+    result = BookshelfSchema.execute(query, variables: variables, context: context, operation_name: operation_name)
+    render json: result
+  end
+
+  private
+
+  # Handle form data, JSON body, or a blank value
+  def ensure_hash(ambiguous_param)
+    case ambiguous_param
+    when String
+      if ambiguous_param.present?
+        ensure_hash(JSON.parse(ambiguous_param))
+      else
+        {}
+      end
+    when Hash, ActionController::Parameters
+      ambiguous_param
+    when nil
+      {}
+    else
+      raise ArgumentError, "Unexpected parameter: #{ambiguous_param}"
+    end
+  end
+end

app/graphql/bookshelf_schema.rb

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+BookshelfSchema = GraphQL::Schema.define do
+  mutation(Types::MutationType)
+  query(Types::QueryType)
+end

app/graphql/types/mutation_type.rb

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+Types::MutationType = GraphQL::ObjectType.define do
+  name "Mutation"
+
+  # TODO: Remove me
+  field :testField, types.String do
+    description "An example field added by the generator"
+    resolve ->(obj, args, ctx) {
+      "Hello World!"
+    }
+  end
+end

app/graphql/types/query_type.rb

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+Types::QueryType = GraphQL::ObjectType.define do
+  name "Query"
+  # Add root-level fields here.
+  # They will be entry points for queries on your schema.
+
+  # TODO: remove me
+  field :testField, types.String do
+    description "An example field added by the generator"
+    resolve ->(obj, args, ctx) {
+      "Hello World!"
+    }
+  end
+end

app/jobs/application_job.rb

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+class ApplicationJob < ActiveJob::Base
+end

app/mailers/application_mailer.rb

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+class ApplicationMailer < ActionMailer::Base
+  default from: '[email protected]'
+  layout 'mailer'
+end

app/models/application_record.rb

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+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end

app/views/layouts/mailer.html.erb

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+<!DOCTYPE html>
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+    <style>
+      /* Email styles need to be inline */
+    </style>
+  </head>
+
+  <body>
+    <%= yield %>
+  </body>
+</html>

app/views/layouts/mailer.text.erb

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+<%= yield %>

bin/bundle

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+#!/usr/bin/env ruby
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
+load Gem.bin_path('bundler', 'bundle')

bin/rails

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+#!/usr/bin/env ruby
+begin
+  load File.expand_path('../spring', __FILE__)
+rescue LoadError => e
+  raise unless e.message.include?('spring')
+end
+APP_PATH = File.expand_path('../config/application', __dir__)
+require_relative '../config/boot'
+require 'rails/commands'

bin/rake

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+#!/usr/bin/env ruby
+begin
+  load File.expand_path('../spring', __FILE__)
+rescue LoadError => e
+  raise unless e.message.include?('spring')
+end
+require_relative '../config/boot'
+require 'rake'
+Rake.application.run