Phantom

Graphql

Response handler

• Catches errors automatically:

  • ActiveRecord::RecordNotFound

• Includes raise_error response handler in GraphQL::Schema::RelayClassicMutation

  raise_error person.errors.full_messages.to_sentence unless person.update(status: :active)

Authorization

• Add authorize option to field

  # app/graphql/types/base_field.rb
  
  field_class.include(Phantom::Graphql::FieldExtensions)

  field :posts, [Types::PostType], authorize: "PostPolicy#index?", null: false

Preload to prevent N+1

• Pass asscoation name in preload which will fix N+1 query

• Pass Policy name in scope, which will reduces scope in preloaded query

  class Types::PostType < Types::BaseObject
    field :comments, [Types::CommentType], scope: "CommentPolicy", preload: :comments, null: false
  end