- new todo items

- alias to_sql to to_s
- added column_for to join (untested)

doc/TODO

@@ -1,10 +1,14 @@
 todo:
+- active record query adapter
+- audit active record quoting
 - incorporate linq functionality/terminology
   - then_by (ordering)
   - reverse
   - any/all
   - where
-- fix complex joining cases:
+- limit clauses with left outer joins ?
+  - see add_limited_ids_condition
+  - select_limited_ids_list
 - extract adapters
 - cache expiry on write
   - rewrite of arecord querycache test in light of this
@@ -61,6 +65,7 @@ done:
 - test Value, in particular bind.
 - test blank checks in relation.rb
 - rename active_relation to arel
+- fix complex joining cases:
 
 icebox:
 - #bind in Attribute and Expression should be doing a descend?

lib/arel/predicates.rb

@@ -23,6 +23,7 @@ module Arel
     def to_sql(formatter = nil)
       "#{operand1.to_sql} #{predicate_sql} #{operand1.format(operand2)}"
     end
+    alias_method :to_s, :to_sql
   end
 
   class Equality < Binary

lib/arel/relations/join.rb

@@ -37,6 +37,11 @@ module Arel
       end
     end
     
+    # TESTME: Not sure which scenario needs this method, was driven by failing tests in ActiveRecord
+    def column_for(attribute)
+      (relation1[attribute] || relation2[attribute]).column
+    end
+    
     def joins
       this_join = [
         join_sql,