Fixed STI type condition for eager loading of associations

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

2 files changed, 6 insertions, 7 deletions

diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index 4e33dfe69f..b72fdb305f 100644
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -2099,10 +2099,8 @@ module ActiveRecord
                 else
                   ""
               end || ''
-              join << %(AND %s.%s = %s ) % [
-                connection.quote_table_name(aliased_table_name),
-                connection.quote_column_name(klass.inheritance_column),
-                klass.quote_value(klass.sti_name)] unless klass.descends_from_active_record?
+              join << %(AND %s) % [
+                klass.send(:type_condition, aliased_table_name)] unless klass.descends_from_active_record?
 
               [through_reflection, reflection].each do |ref|
                 join << "AND #{interpolate_sql(sanitize_sql(ref.options[:conditions]))} " if ref && ref.options[:conditions]
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 2c4ead081d..6eb4d42d51 100644
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1609,10 +1609,11 @@ module ActiveRecord #:nodoc:
           sql << "WHERE #{merged_conditions} " unless merged_conditions.blank?
         end
 
-        def type_condition
+        def type_condition(table_alias=nil)
+          quoted_table_alias = self.connection.quote_table_name(table_alias || table_name)
           quoted_inheritance_column = connection.quote_column_name(inheritance_column)
-          type_condition = subclasses.inject("#{quoted_table_name}.#{quoted_inheritance_column} = '#{sti_name}' ") do |condition, subclass|
-            condition << "OR #{quoted_table_name}.#{quoted_inheritance_column} = '#{subclass.sti_name}' "
+          type_condition = subclasses.inject("#{quoted_table_alias}.#{quoted_inheritance_column} = '#{sti_name}' ") do |condition, subclass|
+            condition << "OR #{quoted_table_alias}.#{quoted_inheritance_column} = '#{subclass.sti_name}' "
           end
 
           " (#{type_condition}) "