When empty options passed to having clause having_values was [nil] but should be empty.

2 files changed, 8 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 6ee3711052..9fcd2d06c5 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -551,7 +551,6 @@ module ActiveRecord
     #   Order.having('SUM(price) > 30').group('user_id')
     def having(opts, *rest)
       opts.blank? ? self : spawn.having!(opts, *rest)
-      spawn.having!(opts, *rest)
     end
 
     def having!(opts, *rest) # :nodoc:
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 9008c2785e..cf6af4e8f4 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -1299,6 +1299,14 @@ class RelationTest < ActiveRecord::TestCase
     assert_equal ['Foo', 'Foo'], query.uniq(true).uniq(false).map(&:name)
   end
 
+  def test_doesnt_add_having_values_if_options_are_blank
+    scope = Post.having('')
+    assert_equal [], scope.having_values
+
+    scope = Post.having([])
+    assert_equal [], scope.having_values
+  end
+
   def test_references_triggers_eager_loading
     scope = Post.includes(:comments)
     assert !scope.eager_loading?