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-rw-r--r--activerecord/test/cases/finder_test.rb14
-rw-r--r--activerecord/test/models/post.rb1
2 files changed, 15 insertions, 0 deletions
diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb
index 95d006279d..b42a60fea5 100644
--- a/activerecord/test/cases/finder_test.rb
+++ b/activerecord/test/cases/finder_test.rb
@@ -4,6 +4,7 @@ require 'models/author'
require 'models/categorization'
require 'models/comment'
require 'models/company'
+require 'models/tagging'
require 'models/topic'
require 'models/reply'
require 'models/entrant'
@@ -78,6 +79,19 @@ class FinderTest < ActiveRecord::TestCase
assert_raise(NoMethodError) { Topic.exists?([1,2]) }
end
+ def test_exists_with_polymorphic_relation
+ post = Post.create!(title: 'Post', body: 'default', taggings: [Tagging.new(comment: 'tagging comment')])
+ relation = Post.tagged_with_comment('tagging comment')
+
+ assert_equal true, relation.exists?(title: ['Post'])
+ assert_equal true, relation.exists?(['title LIKE ?', 'Post%'])
+ assert_equal true, relation.exists?
+ assert_equal true, relation.exists?(post.id)
+ assert_equal true, relation.exists?(post.id.to_s)
+
+ assert_equal false, relation.exists?(false)
+ end
+
def test_exists_passing_active_record_object_is_deprecated
assert_deprecated do
Topic.exists?(Topic.new)
diff --git a/activerecord/test/models/post.rb b/activerecord/test/models/post.rb
index a29858213b..56a31011da 100644
--- a/activerecord/test/models/post.rb
+++ b/activerecord/test/models/post.rb
@@ -41,6 +41,7 @@ class Post < ActiveRecord::Base
scope :with_tags, -> { preload(:taggings) }
scope :tagged_with, ->(id) { joins(:taggings).where(taggings: { tag_id: id }) }
+ scope :tagged_with_comment, ->(comment) { joins(:taggings).where(taggings: { comment: comment }) }
has_many :comments do
def find_most_recent