Ensure JoinAssociation uses aliased table name when multiple associat…

…ions have hash conditions on the same table

activerecord/lib/active_record/associations.rb

@@ -2123,7 +2123,7 @@ def association_join
                 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]
+                join << "AND #{interpolate_sql(sanitize_sql(ref.options[:conditions], aliased_table_name))} " if ref && ref.options[:conditions]
               end
 
               join

activerecord/lib/active_record/associations/association_proxy.rb

@@ -169,8 +169,8 @@ def interpolate_sql(sql, record = nil)
         end
 
         # Forwards the call to the reflection class.
-        def sanitize_sql(sql)
-          @reflection.klass.send(:sanitize_sql, sql)
+        def sanitize_sql(sql, table_name = @reflection.klass.quoted_table_name)
+          @reflection.klass.send(:sanitize_sql, sql, table_name)
         end
 
         # Assigns the ID of the owner to the corresponding foreign key in +record+.

activerecord/lib/active_record/base.rb

@@ -2228,12 +2228,12 @@ def class_name_of_active_record_descendant(klass) #:nodoc:
         #   ["name='%s' and group_id='%s'", "foo'bar", 4]  returns  "name='foo''bar' and group_id='4'"
         #   { :name => "foo'bar", :group_id => 4 }  returns "name='foo''bar' and group_id='4'"
         #   "name='foo''bar' and group_id='4'" returns "name='foo''bar' and group_id='4'"
-        def sanitize_sql_for_conditions(condition)
+        def sanitize_sql_for_conditions(condition, table_name = quoted_table_name)
           return nil if condition.blank?
 
           case condition
             when Array; sanitize_sql_array(condition)
-            when Hash;  sanitize_sql_hash_for_conditions(condition)
+            when Hash;  sanitize_sql_hash_for_conditions(condition, table_name)
             else        condition
           end
         end

activerecord/test/cases/associations/inner_join_association_test.rb

@@ -29,6 +29,11 @@ def test_construct_finder_sql_applies_association_conditions
     assert_match /INNER JOIN .?categories.? ON.*AND.*.?General.?.*TERMINATING_MARKER/, sql
   end
 
+  def test_construct_finder_sql_applies_aliases_tables_on_association_conditions
+    result = Author.find(:all, :joins => [:thinking_posts, :welcome_posts])
+    assert_equal authors(:david), result.first
+  end
+
   def test_construct_finder_sql_unpacks_nested_joins
     sql = Author.send(:construct_finder_sql, :joins => {:posts => [[:comments]]})
     assert_no_match /inner join.*inner join.*inner join/i, sql, "only two join clauses should be present"

activerecord/test/models/author.rb

@@ -25,6 +25,8 @@ def testing_proxy_target
   has_many :comments_with_order_and_conditions, :through => :posts, :source => :comments, :order => 'comments.body', :conditions => "comments.body like 'Thank%'"
   has_many :comments_with_include, :through => :posts, :source => :comments, :include => :post
 
+  has_many :thinking_posts, :class_name => 'Post', :conditions => { :title => 'So I was thinking' }
+  has_many :welcome_posts,  :class_name => 'Post', :conditions => { :title => 'Welcome to the weblog' }
 
   has_many :comments_desc, :through => :posts, :source => :comments, :order => 'comments.id DESC'
   has_many :limited_comments, :through => :posts, :source => :comments, :limit => 1