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authorDavid Heinemeier Hansson <david@loudthinking.com>2004-12-08 16:13:04 +0000
committerDavid Heinemeier Hansson <david@loudthinking.com>2004-12-08 16:13:04 +0000
commit7359bccece7e629b102dde40a7ac5807dd85e519 (patch)
treea7a36d30a49a8801f62d6e41dc6128bd8d6edf3c /activerecord/lib
parent1cf7eb1ca84a65fead68104572bc2cbac1fe95a0 (diff)
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Added ActiveRecord::Mixins::Touch that will record creation and update times of objects [xal]
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@85 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'activerecord/lib')
-rw-r--r--activerecord/lib/active_record/mixins/touch.rb35
1 files changed, 35 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/mixins/touch.rb b/activerecord/lib/active_record/mixins/touch.rb
new file mode 100644
index 0000000000..74a1737cab
--- /dev/null
+++ b/activerecord/lib/active_record/mixins/touch.rb
@@ -0,0 +1,35 @@
+module ActiveRecord
+ module Mixins
+ # Including this mixins will record when objects of the class are created in a datetime column called "created_at"
+ # and when its updated in another datetime column called "updated_at".
+ #
+ # class Bill < ActiveRecord::Base
+ # include ActiveRecord::Mixins::Touch
+ # end
+ #
+ # bill = Bill.create("amount" => 100)
+ # bill.created_at # => Time.now at the moment of Bill.create
+ # bill.updated_at # => Time.now at the moment of Bill.create
+ #
+ # bill.update_attribute("amount", 150)
+ # bill.created_at # => Time.now at the moment of Bill.create
+ # bill.updated_at # => Time.now at the moment of bill.update_attribute
+ module Touch
+ def self.append_features(base)
+ super
+ base.class_eval do
+ before_create :touch_on_create
+ before_update :touch_on_update
+
+ def touch_on_create
+ self.created_at = self.updated_at = Time.now
+ end
+
+ def touch_on_update
+ self.updated_at = Time.now
+ end
+ end
+ end
+ end
+ end
+end \ No newline at end of file