From 7cce95b25ace33e04526d4490e487a080c1f9b96 Mon Sep 17 00:00:00 2001
From: Emilio Tagua <miloops@gmail.com>
Date: Thu, 27 Aug 2009 18:52:14 -0300
Subject: Add readonly support for relations.
---
activerecord/lib/active_record/base.rb | 7 ++++++-
activerecord/lib/active_record/relation.rb | 12 +++++++++++-
2 files changed, 17 insertions(+), 2 deletions(-)
(limited to 'activerecord/lib')
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index c11c049415..402d68c36e 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -1722,7 +1722,7 @@ module ActiveRecord #:nodoc:
def construct_finder_arel(options = {}, scope = scope(:find))
# TODO add lock to Arel
- arel_table(options[:from]).
+ relation = arel_table(options[:from]).
joins(construct_join(options[:joins], scope)).
conditions(construct_conditions(options[:conditions], scope)).
select(options[:select] || (scope && scope[:select]) || default_select(options[:joins] || (scope && scope[:joins]))).
@@ -1730,6 +1730,11 @@ module ActiveRecord #:nodoc:
order(construct_order(options[:order], scope)).
limit(construct_limit(options[:limit], scope)).
offset(construct_offset(options[:offset], scope))
+
+ relation = relation.readonly if options[:readonly]
+
+ relation
+
end
def construct_finder_sql(options, scope = scope(:find))
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index 570ba3f80d..4b53857d36 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -5,10 +5,20 @@ module ActiveRecord
def initialize(klass, relation)
@klass, @relation = klass, relation
+ @readonly = false
+ end
+
+ def readonly
+ @readonly = true
+ self
end
def to_a
- @klass.find_by_sql(@relation.to_sql)
+ records = @klass.find_by_sql(@relation.to_sql)
+
+ records.each { |record| record.readonly! } if @readonly
+
+ records
end
def each(&block)
--
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