Merge pull request #15846 from sgrif/sg-attributes-before-type-cast

Move `attributes_before_type_cast` to `AttributeSet`

Conflicts:
	activerecord/lib/active_record/attribute_set.rb
	activerecord/test/cases/attribute_set_test.rb

activerecord/lib/active_record/attribute_methods/before_type_cast.rb

@@ -57,7 +57,7 @@ def read_attribute_before_type_cast(attr_name)
       #   task.attributes_before_type_cast
       #   # => {"id"=>nil, "title"=>nil, "is_done"=>true, "completed_on"=>"2012-10-21", "created_at"=>nil, "updated_at"=>nil}
       def attributes_before_type_cast
-        @attributes.each_with_object({}) { |(k, v), h| h[k] = v.value_before_type_cast }
+        @attributes.values_before_type_cast
       end
 
       private

activerecord/lib/active_record/attribute_set.rb

 module ActiveRecord
   class AttributeSet # :nodoc:
-    delegate :[], :[]=, :fetch, :include?, :keys, :each_with_object, to: :attributes
+    delegate :[], :[]=, :fetch, :include?, :keys, to: :attributes
 
     def initialize(attributes)
       @attributes = attributes
     end
 
+    def values_before_type_cast
+      attributes.each_with_object({}) { |(k, v), h| h[k] = v.value_before_type_cast }
+    end
+
     def to_hash
       attributes.each_with_object({}) { |(k, v), h| h[k] = v.value }
     end

activerecord/test/cases/attribute_set_test.rb

@@ -61,5 +61,12 @@ class AttributeSetTest < ActiveRecord::TestCase
       assert_equal({ foo: 1, bar: 2.2 }, attributes.to_hash)
       assert_equal({ foo: 1, bar: 2.2 }, attributes.to_h)
     end
+
+    test "values_before_type_cast" do
+      builder = AttributeSet::Builder.new(foo: Type::Integer.new, bar: Type::Integer.new)
+      attributes = builder.build_from_database(foo: '1.1', bar: '2.2')
+
+      assert_equal({ foo: '1.1', bar: '2.2' }, attributes.values_before_type_cast)
+    end
   end
 end