Revert the change at ActiveModel::Errors#add_on_blank and fix in the

right place.

The EachValidator#validate already handle :allow_blank and :allow_nil,
correctly.

Closes #8622.

Fix #8621.

2 files changed, 3 insertions, 9 deletions

diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 92c2512aa4..963e52bff3 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -322,15 +322,9 @@ module ActiveModel
     #   person.errors.messages
     #   # => {:name=>["can't be blank"]}
     def add_on_blank(attributes, options = {})
-      return if options[:allow_blank]
-
       Array(attributes).each do |attribute|
         value = @base.send(:read_attribute_for_validation, attribute)
-        if value.nil?
-          add(attribute, :blank, options) unless options[:allow_nil]
-        elsif value.blank?
-          add(attribute, :blank, options)
-        end
+        add(attribute, :blank, options) if value.blank?
       end
     end
 
diff --git a/activemodel/lib/active_model/validations/presence.rb b/activemodel/lib/active_model/validations/presence.rb
index ae84c376b9..ab8c8359fc 100644
--- a/activemodel/lib/active_model/validations/presence.rb
+++ b/activemodel/lib/active_model/validations/presence.rb
@@ -3,8 +3,8 @@ module ActiveModel
 
   module Validations
     class PresenceValidator < EachValidator # :nodoc:
-      def validate(record)
-        record.errors.add_on_blank(attributes, options)
+      def validate_each(record, attr_name, value)
+        record.errors.add(attr_name, :blank, options) if value.blank?
       end
     end