Respect new records for `CollectionProxy#uniq`

Currently if `CollectionProxy` has more than one new record,
`CollectionProxy#uniq` result is incorrect.

And `CollectionProxy#uniq` was aliased to `distinct` in a1bb6c8b06db.
But the `uniq` method and the `SELECT DISTINCT` method are different
methods. The doc in `CollectionProxy` is for the `SELECT DISTINCT`
method, not for the `uniq` method.

Therefore, reverting the alias in `CollectionProxy` to fix the
inconsistency and to have the both methods.

1 files changed, 0 insertions, 7 deletions

diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb
index f8aac895d7..7cd25ea524 100644
--- a/activerecord/lib/active_record/associations/collection_association.rb
+++ b/activerecord/lib/active_record/associations/collection_association.rb
@@ -246,13 +246,6 @@ module ActiveRecord
         end
       end
 
-      def distinct
-        seen = {}
-        load_target.find_all do |record|
-          seen[record.id] = true unless seen.key?(record.id)
-        end
-      end
-
       # Replace this collection with +other_array+. This will perform a diff
       # and delete/add only records that have changed.
       def replace(other_array)