Versioning a global ID field in GraphQL-Ruby

global_id_changeset.rb

require "bundler/inline"

gemfile do
  gem "graphql", "1.13.2"
  gem "graphql-enterprise", "1.1.0"
end

class BaseField < GraphQL::Schema::Field
  include GraphQL::Enterprise::Changeset::FieldIntegration
end


class Thing < GraphQL::Schema::Object
  field_class BaseField
  implements GraphQL::Types::Relay::Node

  def id
    "old-id"
  end

  def global_id
    context.schema.id_from_object(object, self, context)
  end
end

class Query < GraphQL::Schema::Object
  field :thing, Thing

  def thing
    Object.new
  end
end

class MigrateId < GraphQL::Enterprise::Changeset
  release "2022-01-01"
  modifies Thing do
    field :id, ID, null: false, description: "ID of the object.", resolver_method: :global_id
  end
end


class Schema < GraphQL::Schema
  query(Query)
  use GraphQL::Enterprise::Changeset::Release, changesets: [MigrateId]

  def self.id_from_object(obj, type, ctx)
    "new-id"
  end
end

pp Schema.execute("{ thing { id } }", context: { changeset_version: nil }).to_h
# =>  {"data"=>{"thing"=>{"id"=>"old-id"}}}

pp Schema.execute("{ thing { id } }", context: { changeset_version: "2022-01-01" }).to_h
# => {"data"=>{"thing"=>{"id"=>"new-id"}}}

p [:same_definition?, Schema.to_definition == Schema.to_definition(context: { changeset_version: "2022-01-01"} )]
# => [:same_definition?, true]