2 files changed, 7 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb
index c9c50da36e..80cf933555 100644
--- a/activerecord/lib/active_record/associations/join_dependency.rb
+++ b/activerecord/lib/active_record/associations/join_dependency.rb
@@ -144,11 +144,15 @@ module ActiveRecord
         ref[association.reflection.name] ||= {}
       end
 
+      def find_reflection(klass, name)
+        klass.reflect_on_association(name.intern) or
+          raise ConfigurationError, "Association named '#{ name }' was not found on #{ klass.name }; perhaps you misspelled it?"
+      end
+
       def build(associations, parent, join_type)
         case associations
         when Symbol, String
-          reflection = parent.reflections[associations.intern] or
-          raise ConfigurationError, "Association named '#{ associations }' was not found on #{ parent.base_klass.name }; perhaps you misspelled it?"
+          reflection = find_reflection parent.base_klass, associations
           unless join_association = find_join_association(reflection, parent)
             @reflections << reflection
             join_association = build_join_association(reflection, parent, join_type)
diff --git a/activerecord/lib/active_record/associations/join_dependency/join_part.rb b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
index 8024105472..2b6034ca9d 100644
--- a/activerecord/lib/active_record/associations/join_dependency/join_part.rb
+++ b/activerecord/lib/active_record/associations/join_dependency/join_part.rb
@@ -13,7 +13,7 @@ module ActiveRecord
         # association.
         attr_reader :base_klass
 
-        delegate :table_name, :column_names, :primary_key, :reflections, :arel_engine, :to => :base_klass
+        delegate :table_name, :column_names, :primary_key, :arel_engine, :to => :base_klass
 
         def initialize(base_klass)
           @base_klass = base_klass