From 2f944123f32ad37efc84f13de25350beb7f8fed6 Mon Sep 17 00:00:00 2001 From: David Heinemeier Hansson Date: Thu, 17 Mar 2005 14:12:25 +0000 Subject: Added Base.exists?(id) that'll return true if an object of the class with the given id exists #854 [stian@grytoyr.net] git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@913 5ecf4fe2-1ee6-0310-87b1-e25e094e27de --- activerecord/lib/active_record/base.rb | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'activerecord/lib') diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index 7fbef9f07c..f85cad1f98 100755 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -326,6 +326,13 @@ module ActiveRecord #:nodoc: end end + # Returns true if the given +id+ represents the primary key of a record in the database, false otherwise. + # Example: + # Person.exists?(5) + def exists?(id) + !find_first("#{primary_key} = #{sanitize(id)}").nil? + end + # This method is deprecated in favor of find with the :conditions option. # Works like find, but the record matching +id+ must also meet the +conditions+. # +RecordNotFound+ is raised if no record can be found matching the +id+ or meeting the condition. -- cgit v1.2.3