diff options
Diffstat (limited to 'activerecord/lib')
| -rw-r--r-- | activerecord/lib/active_record/relation/spawn_methods.rb | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb index 7bf9c16959..1d2151fdb2 100644 --- a/activerecord/lib/active_record/relation/spawn_methods.rb +++ b/activerecord/lib/active_record/relation/spawn_methods.rb @@ -5,6 +5,20 @@ require 'active_record/relation/merger' module ActiveRecord module SpawnMethods + + # Merges in the conditions from <tt>other</tt>, if <tt>other</tt> is an <tt>ActiveRecord::Relation</tt>. + # Returns an array representing the union of the resulting records with <tt>other</tt>, if <tt>other</tt> is an array. + # + # ==== Examples + # + # Post.where(:published => true).joins(:comments).merge( Comment.where(:spam => false) ) + # # Performs a single join query with both where conditions. + # + # recent_posts = Post.order('created_at DESC').first(5) + # Post.where(:published => true).merge(recent_posts) + # # Returns the union of all published posts with the 5 most recently created posts. + # # (This is just an example. You'd probably want to do this with a single query!) + # def merge(other) if other.is_a?(Array) to_a & other |