Some jsonapi libs leave IDs as nils...

Author: stas

lib/jsonapi/rspec/id.rb

@@ -3,7 +3,7 @@ module RSpec
     module Id
       ::RSpec::Matchers.define :have_id do |expected|
         match do |actual|
-          JSONAPI::RSpec.as_indifferent_hash(actual)['id'] == expected.to_s
+          JSONAPI::RSpec.as_indifferent_hash(actual)['id'] == expected
         end
       end
     end