From b0ab1a2c09769ba6e4351c1e059b1641ec51bc35 Mon Sep 17 00:00:00 2001
From: Rafael Magana <raf.magana@gmail.com>
Date: Sat, 20 Feb 2010 13:21:55 -0600
Subject: [PATCH] added :noselect option to ActiveRecord#find

User.find(:noselect => "salt, crypted_password")
---
 activerecord/lib/active_record/base.rb |   20 +++++++++++++++-----
 1 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index 78c580f..3072b46 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -607,6 +607,7 @@ module ActiveRecord #:nodoc:
       def find(*args)
         options = args.extract_options!
         validate_find_options(options)
+        options = map_pseudo_options!(options)
         set_readonly_option!(options)
 
         case args.first
@@ -616,7 +617,14 @@ module ActiveRecord #:nodoc:
           else             find_from_ids(args, options)
         end
       end
-
+            
+      def map_pseudo_options!(options)
+        if options[:noselect]
+          options[:select] = (column_names - options[:noselect].split(",").collect! { |c| c.strip }).join(",")
+        end
+        options
+      end
+      
       # A convenience wrapper for <tt>find(:first, *args)</tt>. You can pass in all the
       # same arguments to this method as you can to <tt>find(:first)</tt>.
       def first(*args)
@@ -2223,7 +2231,7 @@ module ActiveRecord #:nodoc:
             end
           end
         end
-
+        
         # Returns the class descending directly from ActiveRecord::Base or an
         # abstract class, if any, in the inheritance hierarchy.
         def class_of_active_record_descendant(klass)
@@ -2403,7 +2411,9 @@ module ActiveRecord #:nodoc:
 
           expanded
         end
-
+        
+        VALID_FIND_PSEUDO_OPTIONS = [:noselect]
+        
         def quote_bound_value(value) #:nodoc:
           if value.respond_to?(:map) && !value.acts_like?(:string)
             if value.respond_to?(:empty?) && value.empty?
@@ -2426,9 +2436,9 @@ module ActiveRecord #:nodoc:
                                :order, :select, :readonly, :group, :having, :from, :lock ]
 
         def validate_find_options(options) #:nodoc:
-          options.assert_valid_keys(VALID_FIND_OPTIONS)
+          options.assert_valid_keys(VALID_FIND_OPTIONS + VALID_FIND_PSEUDO_OPTIONS)
         end
-
+              
         def set_readonly_option!(options) #:nodoc:
           # Inherit :readonly from finder scope if set.  Otherwise,
           # if :joins is not blank then :readonly defaults to true.
-- 
1.6.4.2