From 6b6efeecc10d52589c0fa0f139843729a35e0a19 Mon Sep 17 00:00:00 2001
From: Sammy Larbi <sam@codeodor.com>
Date: Wed, 12 Mar 2014 07:05:29 -0500
Subject: [PATCH 1/4] add failing test that shows Paranoia not working with
 validates_uniquness_of

---
 test/paranoia_test.rb | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/test/paranoia_test.rb b/test/paranoia_test.rb
index 173e86e2..af57b386 100644
--- a/test/paranoia_test.rb
+++ b/test/paranoia_test.rb
@@ -28,7 +28,7 @@ def setup!
     'fail_callback_models' => 'deleted_at DATETIME',
     'related_models' => 'parent_model_id INTEGER, parent_model_with_counter_cache_column_id INTEGER, deleted_at DATETIME',
     'asplode_models' => 'parent_model_id INTEGER, deleted_at DATETIME',
-    'employers' => 'deleted_at DATETIME',
+    'employers' => 'name VARCHAR(32), deleted_at DATETIME',
     'employees' => 'deleted_at DATETIME',
     'jobs' => 'employer_id INTEGER NOT NULL, employee_id INTEGER NOT NULL, deleted_at DATETIME',
     'custom_column_models' => 'destroyed_at DATETIME',
@@ -685,6 +685,13 @@ def test_observers_not_notified_if_not_supported
     # essentially, we're just ensuring that this doesn't crash
   end
 
+  def test_validates_uniqueness_only_checks_non_deleted_records
+    a = Employer.create!(name: "A")
+    a.destroy
+    b = Employer.new(name: "A")
+    assert b.valid?
+  end
+
   def test_i_am_the_destroyer
     expected = %Q{
       Sharon: "There should be a method called I_AM_THE_DESTROYER!"
@@ -909,6 +916,7 @@ def set_after_commit_on_destroy_callback_called
 
 class Employer < ActiveRecord::Base
   acts_as_paranoid
+  validates_uniqueness_of :name
   has_many :jobs
   has_many :employees, :through => :jobs
 end

From a3179441055f62643a5015668d357e9d6086896e Mon Sep 17 00:00:00 2001
From: Sammy Larbi <sam@codeodor.com>
Date: Sun, 16 Mar 2014 09:08:12 -0500
Subject: [PATCH 2/4] Ensure uniqueness validation is scoped by deleted_at
 Fixes #114

---
 lib/paranoia.rb | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/paranoia.rb b/lib/paranoia.rb
index 6549d7da..e379ed6d 100644
--- a/lib/paranoia.rb
+++ b/lib/paranoia.rb
@@ -237,3 +237,16 @@ def paranoia_sentinel_value
 end
 
 require 'paranoia/rspec' if defined? RSpec
+
+module ActiveRecord
+  module Validations
+    class UniquenessValidator < ActiveModel::EachValidator
+      protected
+      def build_relation_with_paranoia(klass, table, attribute, value)
+        relation = build_relation_without_paranoia(klass, table, attribute, value)
+        relation.and(klass.arel_table[klass.paranoia_column].eq(nil))
+      end
+      alias_method_chain :build_relation, :paranoia
+    end
+  end
+end

From b6d60b556bf95e21e5243a97ee1ca978364252e4 Mon Sep 17 00:00:00 2001
From: Sammy Larbi <sam@codeodor.com>
Date: Sun, 21 Jun 2015 17:54:20 -0500
Subject: [PATCH 3/4] Test to ensure validates_uniqueness_of still works

---
 test/paranoia_test.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/paranoia_test.rb b/test/paranoia_test.rb
index af57b386..c36e959c 100644
--- a/test/paranoia_test.rb
+++ b/test/paranoia_test.rb
@@ -692,6 +692,12 @@ def test_validates_uniqueness_only_checks_non_deleted_records
     assert b.valid?
   end
 
+  def test_validates_uniqueness_still_works_on_non_deleted_records
+    a = Employer.create!(name: "A")
+    b = Employer.new(name: "A")
+    refute b.valid?
+  end
+
   def test_i_am_the_destroyer
     expected = %Q{
       Sharon: "There should be a method called I_AM_THE_DESTROYER!"

From 7232e2f5a76e8cad4c4a664d1ab33d87edcea12e Mon Sep 17 00:00:00 2001
From: Sammy Larbi <sam@codeodor.com>
Date: Sun, 21 Jun 2015 18:51:14 -0500
Subject: [PATCH 4/4] Fix `NameError: wrong constant name` on Ruby 1.9 Ruby
 1.9's version of `Object.const_get` does not support namespaced constants, so
 this commit replaces it with `ActiveSupport`'s `#constantize` method.

The tests were failing running JRuby on 1.9 mode. CRuby was not failing because it is not tested against 1.9.
---
 lib/paranoia.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/paranoia.rb b/lib/paranoia.rb
index e379ed6d..3d8c5a4a 100644
--- a/lib/paranoia.rb
+++ b/lib/paranoia.rb
@@ -154,7 +154,7 @@ def restore_associated_records
           association_find_conditions = { association_foreign_key => self.id }
         end
 
-        association_class = Object.const_get(association_class_name)
+        association_class = association_class_name.constantize
         if association_class.paranoid?
           association_class.only_deleted.where(association_find_conditions).first.try!(:restore, recursive: true)
         end