rollback transaction if destroy aborted (fix #484)

lib/paranoia.rb

@@ -59,7 +59,7 @@ def restore(id_or_ids, opts = {})
 
   def paranoia_destroy
     with_transaction_returning_status do
-      run_callbacks(:destroy) do
+      result = run_callbacks(:destroy) do
         @_disable_counter_cache = deleted?
         result = paranoia_delete
         next result unless result && ActiveRecord::VERSION::STRING >= '4.2'
@@ -73,7 +73,9 @@ def paranoia_destroy
         @_disable_counter_cache = false
         result
       end
-    end
+      raise ActiveRecord::Rollback, "Not destroyed" unless self.deleted?
+      result
+    end || false
   end
   alias_method :destroy, :paranoia_destroy
 

test/paranoia_test.rb

@@ -48,7 +48,7 @@ def setup!
     'active_column_models' => 'paranoid_model_id INTEGER, deleted_at DATETIME, active BOOLEAN',
     'active_column_model_with_uniqueness_validations' => 'name VARCHAR(32), deleted_at DATETIME, active BOOLEAN',
     'paranoid_model_with_belongs_to_active_column_model_with_has_many_relationships' => 'name VARCHAR(32), deleted_at DATETIME, active BOOLEAN, active_column_model_with_has_many_relationship_id INTEGER',
-    'active_column_model_with_has_many_relationships' => 'name VARCHAR(32), deleted_at DATETIME, active BOOLEAN', 
+    'active_column_model_with_has_many_relationships' => 'name VARCHAR(32), deleted_at DATETIME, active BOOLEAN',
     'without_default_scope_models' => 'deleted_at DATETIME'
   }.each do |table_name, columns_as_sql_string|
     ActiveRecord::Base.connection.execute "CREATE TABLE #{table_name} (id INTEGER NOT NULL PRIMARY KEY, #{columns_as_sql_string})"
@@ -260,11 +260,11 @@ def test_scoping_behavior_for_paranoid_models
     p2 = ParanoidModel.create(:parent_model => parent2)
     p1.destroy
     p2.destroy
-    
+
     assert_equal 0, parent1.paranoid_models.count
     assert_equal 1, parent1.paranoid_models.only_deleted.count
 
-    assert_equal 2, ParanoidModel.only_deleted.joins(:parent_model).count    
+    assert_equal 2, ParanoidModel.only_deleted.joins(:parent_model).count
     assert_equal 1, parent1.paranoid_models.deleted.count
     assert_equal 0, parent1.paranoid_models.without_deleted.count
     p3 = ParanoidModel.create(:parent_model => parent1)
@@ -302,7 +302,7 @@ def test_only_deleted_with_joins
     c1 = ActiveColumnModelWithHasManyRelationship.create(name: 'Jacky')
     c2 = ActiveColumnModelWithHasManyRelationship.create(name: 'Thomas')
     p1 = ParanoidModelWithBelongsToActiveColumnModelWithHasManyRelationship.create(name: 'Hello', active_column_model_with_has_many_relationship: c1)
-    
+
     c1.destroy
     assert_equal 1, ActiveColumnModelWithHasManyRelationship.count
     assert_equal 1, ActiveColumnModelWithHasManyRelationship.only_deleted.count
@@ -635,6 +635,16 @@ def test_real_destroy_dependent_destroy
     refute NonParanoidModel.unscoped.exists?(child3.id)
   end
 
+  def test_not_destroy_child_if_abort_destroy
+    parent = ParentModel.create
+    child = parent.very_related_models.create
+    parent.destroy_unavailable = true
+    parent.destroy
+
+    assert_nil parent.reload.deleted_at, "Parent must be not deleted"
+    assert_nil child.reload.deleted_at, "Child must be not deleted"
+  end
+
   def test_real_destroy_dependent_destroy_after_normal_destroy
     parent = ParentModel.create
     child = parent.very_related_models.create
@@ -1281,6 +1291,7 @@ def remove_called_variables
 end
 
 class ParentModel < ActiveRecord::Base
+  attr_accessor :destroy_unavailable
   acts_as_paranoid
   has_many :paranoid_models, dependent: :destroy
   has_many :related_models
@@ -1289,6 +1300,17 @@ class ParentModel < ActiveRecord::Base
   has_one :non_paranoid_model, dependent: :destroy
   has_many :asplode_models, dependent: :destroy
   has_one :polymorphic_model, as: :parent, dependent: :destroy
+  before_destroy :validate_destroy
+
+  def validate_destroy
+    return unless self.destroy_unavailable
+
+    if ActiveRecord::VERSION::MAJOR < 5
+      false
+    else
+      throw :abort
+    end
+  end
 end
 
 class ParentModelWithCounterCacheColumn < ActiveRecord::Base