1 files changed, 13 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 88a2ad43ba..c0fdca3da9 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -1192,16 +1192,24 @@ module ActiveRecord
           add_limit!(sql, options, scope)
           return sanitize_sql(sql)
         end
-
+        
+        # Checks if the conditions reference a table other than the current model table
         def include_eager_conditions?(options)
-          conditions = scope(:find, :conditions) || options[:conditions]
-          return false unless conditions
-          conditions = conditions.first if conditions.is_a?(Array)
-          conditions.scan(/(\w+)\.\w+/).flatten.any? do |condition_table_name|
+          # look in both sets of conditions
+          conditions = [scope(:find, :conditions), options[:conditions]].inject([]) do |all, cond|
+            case cond
+              when nil   then all
+              when Array then all << cond.first
+              else            all << cond
+            end
+          end
+          return false unless conditions.any?
+          conditions.join(' ').scan(/(\w+)\.\w+/).flatten.any? do |condition_table_name|
             condition_table_name != table_name
           end
         end
         
+        # Checks if the query order references a table other than the current model's table.
         def include_eager_order?(options)
           order = options[:order]
           return false unless order