1 files changed, 1 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/validations/uniqueness.rb b/activerecord/lib/active_record/validations/uniqueness.rb
index a705d8c2c4..52e46e1ffe 100644
--- a/activerecord/lib/active_record/validations/uniqueness.rb
+++ b/activerecord/lib/active_record/validations/uniqueness.rb
@@ -7,11 +7,7 @@ module ActiveRecord
                                "Pass a callable instead: `conditions: -> { where(approved: true) }`"
         end
         super({ case_sensitive: true }.merge!(options))
-      end
-
-      # Unfortunately, we have to tie Uniqueness validators to a class.
-      def setup(klass)
-        @klass = klass
+        @klass = options[:class]
       end
 
       def validate_each(record, attribute, value)
@@ -34,7 +30,6 @@ module ActiveRecord
       end
 
     protected
-
       # The check for an existing value should be run from a class that
       # isn't abstract. This means working down from the current class
       # (self), to the first non-abstract class. Since classes don't know