AR::Relation#pluck: improve to work with joins

1 files changed, 11 insertions, 0 deletions

diff --git a/activerecord/test/cases/calculations_test.rb b/activerecord/test/cases/calculations_test.rb
index 7c9ebf528e..91d0af4872 100644
--- a/activerecord/test/cases/calculations_test.rb
+++ b/activerecord/test/cases/calculations_test.rb
@@ -478,4 +478,15 @@ class CalculationsTest < ActiveRecord::TestCase
   def test_pluck_with_qualified_column_name
     assert_equal [1,2,3,4], Topic.order(:id).pluck("topics.id")
   end
+
+  def test_pluck_auto_table_name_prefix
+    c = Company.create!(:name => "test", :contracts => [Contract.new])
+    assert_equal [c.id], Company.joins(:contracts).pluck(:id)
+  end
+
+  def test_pluck_not_auto_table_name_prefix_if_column_joined
+    c = Company.create!(:name => "test", :contracts => [Contract.new(:developer_id => 7)])
+    # No chance for typecast here
+    assert_equal ["7"], Company.joins(:contracts).pluck(:developer_id)
+  end
 end