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Remove ability update locking_column value
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5 changed files with 4 additions and 49 deletions
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@ -495,11 +495,6 @@
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*Prathamesh Sonpatki*
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* Optimistic locking: Added ability to update `locking_column` value.
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Ignore optimistic locking if trying to update with new `locking_column` value.
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*bogdanvlviv*
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* Fixed: Optimistic locking does not work well with `null` in the database.
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Fixes #26024.
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@ -47,8 +47,6 @@ module ActiveRecord
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# self.locking_column = :lock_person
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# end
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#
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# Please note that the optimistic locking will be ignored if you update the
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# locking column's value.
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module Optimistic
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extend ActiveSupport::Concern
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@ -80,13 +78,11 @@ module ActiveRecord
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def _update_record(attribute_names = self.attribute_names)
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return super unless locking_enabled?
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lock_col = self.class.locking_column
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return super if attribute_names.include?(lock_col)
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return 0 if attribute_names.empty?
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begin
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lock_col = self.class.locking_column
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previous_lock_value = read_attribute_before_type_cast(lock_col)
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increment_lock
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@ -349,13 +349,14 @@ class DirtyTest < ActiveRecord::TestCase
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def test_partial_update_with_optimistic_locking
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person = Person.new(first_name: "foo")
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old_lock_version = person.lock_version
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with_partial_writes Person, false do
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assert_queries(2) { 2.times { person.save! } }
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Person.where(id: person.id).update_all(first_name: "baz")
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end
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old_lock_version = person.lock_version
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with_partial_writes Person, true do
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assert_queries(0) { 2.times { person.save! } }
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assert_equal old_lock_version, person.reload.lock_version
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@ -247,17 +247,6 @@ class OptimisticLockingTest < ActiveRecord::TestCase
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assert_equal "new title2", t2.title
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end
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def test_lock_without_default_should_update_with_lock_col
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t1 = LockWithoutDefault.create(title: "title1", lock_version: 6)
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assert_equal 6, t1.lock_version
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t1.update(lock_version: 0)
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t1.reload
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assert_equal 0, t1.lock_version
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end
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def test_lock_without_default_queries_count
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t1 = LockWithoutDefault.create(title: "title1")
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@ -270,12 +259,6 @@ class OptimisticLockingTest < ActiveRecord::TestCase
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assert_equal "title2", t1.title
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assert_equal 1, t1.lock_version
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assert_queries(1) { t1.update(title: "title3", lock_version: 6) }
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t1.reload
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assert_equal "title3", t1.title
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assert_equal 6, t1.lock_version
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t2 = LockWithoutDefault.new(title: "title1")
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assert_queries(1) { t2.save! }
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@ -321,17 +304,6 @@ class OptimisticLockingTest < ActiveRecord::TestCase
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assert_equal "new title2", t2.title
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end
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def test_lock_with_custom_column_without_default_should_update_with_lock_col
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t1 = LockWithCustomColumnWithoutDefault.create(title: "title1", custom_lock_version: 6)
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assert_equal 6, t1.custom_lock_version
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t1.update(custom_lock_version: 0)
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t1.reload
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assert_equal 0, t1.custom_lock_version
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end
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def test_lock_with_custom_column_without_default_queries_count
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t1 = LockWithCustomColumnWithoutDefault.create(title: "title1")
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@ -344,12 +316,6 @@ class OptimisticLockingTest < ActiveRecord::TestCase
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assert_equal "title2", t1.title
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assert_equal 1, t1.custom_lock_version
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assert_queries(1) { t1.update(title: "title3", custom_lock_version: 6) }
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t1.reload
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assert_equal "title3", t1.title
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assert_equal 6, t1.custom_lock_version
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t2 = LockWithCustomColumnWithoutDefault.new(title: "title1")
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assert_queries(1) { t2.save! }
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@ -953,9 +953,6 @@ class Client < ApplicationRecord
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end
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```
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NOTE: Please note that the optimistic locking will be ignored if you update the
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locking column's value.
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### Pessimistic Locking
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Pessimistic locking uses a locking mechanism provided by the underlying database. Using `lock` when building a relation obtains an exclusive lock on the selected rows. Relations using `lock` are usually wrapped inside a transaction for preventing deadlock conditions.
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