Fix a bug with single item arrays (#124)

Getting sent to has-one relationship authorizers

Author: brianswko

lib/jsonapi/authorization/authorizing_processor.rb

@@ -315,7 +315,7 @@ def related_models_with_context
               when Hash # polymorphic relationship
                 resource_class = @resource_klass.resource_for(assoc_value[:type].to_s)
                 resource_class.find_by_key(assoc_value[:id], context: context)._model
-              else
+              when Array
                 resource_class = resource_class_for_relationship(assoc_name)
                 resources = resource_class.find_by_keys(assoc_value, context: context)
                 resources.map(&:_model).tap do |scoped_records|
@@ -324,6 +324,9 @@ def related_models_with_context
                     fail JSONAPI::Exceptions::RecordNotFound, related_ids
                   end
                 end
+              else
+                resource_class = resource_class_for_relationship(assoc_name)
+                resource_class.find_by_key(assoc_value, context: context)._model
               end
 
             {

spec/requests/included_resources_spec.rb

@@ -447,7 +447,7 @@
         {
           relation_type: :to_one,
           relation_name: :author,
-          records: [existing_author]
+          records: existing_author
         },
         {
           relation_type: :to_many,

spec/requests/tricky_operations_spec.rb

@@ -41,7 +41,7 @@
       [{
         relation_name: :article,
         relation_type: :to_one,
-        records: [article]
+        records: article
       }]
     end