lib/active_admin/resource.rb in activeadmin-1.0.0.pre1 vs lib/active_admin/resource.rb in activeadmin-1.0.0.pre2

@@ -142,17 +142,23 @@
     def breadcrumb
       instance_variable_defined?(:@breadcrumb) ? @breadcrumb : namespace.breadcrumb
     end
 
     def find_resource(id)
-      resource = resource_class.public_send(method_for_find, id)
+      resource = resource_class.public_send *method_for_find(id)
       decorator_class ? decorator_class.new(resource) : resource
     end
 
     private
 
-    def method_for_find
-      resources_configuration[:self][:finder] || :"find_by_#{resource_class.primary_key}"
+    def method_for_find(id)
+      if finder = resources_configuration[:self][:finder]
+        [finder, id]
+      elsif Rails::VERSION::MAJOR >= 4
+        [:find_by, { resource_class.primary_key => id }]
+      else
+        [:"find_by_#{resource_class.primary_key}", id]
+      end
     end
 
     def default_csv_builder
       @default_csv_builder ||= CSVBuilder.default_for_resource(resource_class)
     end