From 1ba1779754965da9b0cff73d37905b71928d3598 Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Sat, 2 Apr 2005 08:52:51 +0000
Subject: Added that model.items.delete(child) will delete the child, not just
 set the foreign key to nil, if the child is dependent on the model #978
 [bitsweat]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1064 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 activerecord/lib/active_record/associations.rb             |  5 ++++-
 .../lib/active_record/associations/has_many_association.rb | 14 +++++++++-----
 2 files changed, 13 insertions(+), 6 deletions(-)

(limited to 'activerecord/lib/active_record')

diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb
index f9f5ec98a6..5bdc6247ff 100755
--- a/activerecord/lib/active_record/associations.rb
+++ b/activerecord/lib/active_record/associations.rb
@@ -153,7 +153,8 @@ module ActiveRecord
       # * <tt>collection(force_reload = false)</tt> - returns an array of all the associated objects.
       #   An empty array is returned if none are found.
       # * <tt>collection<<(object, ...)</tt> - adds one or more objects to the collection by setting their foreign keys to the collection's primary key.
-      # * <tt>collection.delete(object, ...)</tt> - removes one or more objects from the collection by setting their foreign keys to NULL.  This does not destroy the objects.
+      # * <tt>collection.delete(object, ...)</tt> - removes one or more objects from the collection by setting their foreign keys to NULL.  
+      #   This will also destroy the objects if they're declared as belongs_to and dependent on this model.
       # * <tt>collection.clear</tt> - removes every object from the collection. This does not destroy the objects.
       # * <tt>collection.empty?</tt> - returns true if there are no associated objects.
       # * <tt>collection.size</tt> - returns the number of associated objects.
@@ -219,6 +220,8 @@ module ActiveRecord
 
         if options[:dependent] and options[:exclusively_dependent]
           raise ArgumentError, ':dependent and :exclusively_dependent are mutually exclusive options.  You may specify one or the other.' # ' ruby-mode
+        # See HasManyAssociation#delete_records.  Dependent associations
+        # delete children, otherwise foreign key is set to NULL.
         elsif options[:dependent]
           module_eval "before_destroy '#{association_name}.each { |o| o.destroy }'"
         elsif options[:exclusively_dependent]
diff --git a/activerecord/lib/active_record/associations/has_many_association.rb b/activerecord/lib/active_record/associations/has_many_association.rb
index 0f79e4ccef..01374bd55a 100644
--- a/activerecord/lib/active_record/associations/has_many_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_association.rb
@@ -113,11 +113,15 @@ module ActiveRecord
         end
 
         def delete_records(records)
-          ids = quoted_record_ids(records)
-          @association_class.update_all(
-            "#{@association_class_primary_key_name} = NULL", 
-            "#{@association_class_primary_key_name} = #{@owner.quoted_id} AND #{@association_class.primary_key} IN (#{ids})"
-          )
+          if @options[:dependent]
+            records.each { |r| r.destroy }
+          else
+            ids = quoted_record_ids(records)
+            @association_class.update_all(
+              "#{@association_class_primary_key_name} = NULL", 
+              "#{@association_class_primary_key_name} = #{@owner.quoted_id} AND #{@association_class.primary_key} IN (#{ids})"
+            )
+          end
         end
 
         def target_obsolete?
-- 
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