Revert "Ensure Model#destroy respects optimistic locking"

[#1966 state:open]

This reverts commit 0d922885fb54c19f04680482f024452859218910.

Conflicts:

	activerecord/lib/active_record/locking/optimistic.rb

2 files changed, 0 insertions, 52 deletions

diff --git a/activerecord/lib/active_record/locking/optimistic.rb b/activerecord/lib/active_record/locking/optimistic.rb
index c8cd79a2b0..986bc7009b 100644
--- a/activerecord/lib/active_record/locking/optimistic.rb
+++ b/activerecord/lib/active_record/locking/optimistic.rb
@@ -23,16 +23,6 @@ module ActiveRecord
     #   p2.first_name = "should fail"
     #   p2.save # Raises a ActiveRecord::StaleObjectError
     #
-    # Optimistic locking will also check for stale data when objects are destroyed.  Example:
-    #
-    #   p1 = Person.find(1)
-    #   p2 = Person.find(1)
-    #
-    #   p1.first_name = "Michael"
-    #   p1.save
-    #
-    #   p2.destroy # Raises a ActiveRecord::StaleObjectError
-    #
     # You're then responsible for dealing with the conflict by rescuing the exception and either rolling back, merging,
     # or otherwise apply the business logic needed to resolve the conflict.
     #
@@ -49,7 +39,6 @@ module ActiveRecord
         self.lock_optimistically = true
 
         alias_method_chain :update, :lock
-        alias_method_chain :destroy, :lock
         alias_method_chain :attributes_from_column_definition, :lock
 
         class << self
@@ -111,29 +100,6 @@ module ActiveRecord
           end
         end
 
-  def destroy_with_lock #:nodoc:
-    return destroy_without_lock unless locking_enabled?
-
-    unless new_record?
-      lock_col = self.class.locking_column
-      previous_value = send(lock_col).to_i
-
-      arel_table = self.class.arel_table(self.class.table_name)
-
-      affected_rows = arel_table.where(
-          arel_table[self.class.primary_key].eq(quoted_id).and(
-          arel_table[self.class.locking_column].eq(quote_value(previous_value))
-        )
-      ).delete
-
-      unless affected_rows == 1
-        raise ActiveRecord::StaleObjectError, "Attempted to delete a stale object"
-      end
-    end
-
-    freeze
-  end
-
       module ClassMethods
         DEFAULT_LOCKING_COLUMN = 'lock_version'
 
diff --git a/activerecord/test/cases/locking_test.rb b/activerecord/test/cases/locking_test.rb
index f946e8699e..a64c01292f 100644
--- a/activerecord/test/cases/locking_test.rb
+++ b/activerecord/test/cases/locking_test.rb
@@ -38,24 +38,6 @@ class OptimisticLockingTest < ActiveRecord::TestCase
     assert_raise(ActiveRecord::StaleObjectError) { p2.save! }
   end
 
-  def test_lock_destroy
-    p1 = Person.find(1)
-    p2 = Person.find(1)
-    assert_equal 0, p1.lock_version
-    assert_equal 0, p2.lock_version
-
-    p1.first_name = 'stu'
-    p1.save!
-    assert_equal 1, p1.lock_version
-    assert_equal 0, p2.lock_version
-
-    assert_raises(ActiveRecord::StaleObjectError) { p2.destroy }
-
-    assert p1.destroy
-    assert_equal true, p1.frozen?
-    assert_raises(ActiveRecord::RecordNotFound) { Person.find(1) }
-  end
-
   def test_lock_repeating
     p1 = Person.find(1)
     p2 = Person.find(1)