Deprecate `datetime_field` and `datetime_field_tag` helpers.

Datetime input type was removed from HTML specification.
One can use `datetime_local_field` and `datetime_local_field_tag` instead.

2 files changed, 8 insertions, 0 deletions

diff --git a/actionview/lib/action_view/helpers/form_helper.rb b/actionview/lib/action_view/helpers/form_helper.rb
index e91b3443c5..7ced37572e 100644
--- a/actionview/lib/action_view/helpers/form_helper.rb
+++ b/actionview/lib/action_view/helpers/form_helper.rb
@@ -1118,6 +1118,10 @@ module ActionView
       #   # => <input id="user_born_on" name="user[born_on]" type="datetime" min="2014-05-20T00:00:00.000+0000" />
       #
       def datetime_field(object_name, method, options = {})
+        ActiveSupport::Deprecation.warn(<<-MESSAGE.squish)
+          datetime_field is deprecated and will be removed in Rails 5.1.
+          Use datetime_local_field instead.
+        MESSAGE
         Tags::DatetimeField.new(object_name, method, self, options).render
       end
 
diff --git a/actionview/lib/action_view/helpers/form_tag_helper.rb b/actionview/lib/action_view/helpers/form_tag_helper.rb
index 82e9ace428..cfff0bef5d 100644
--- a/actionview/lib/action_view/helpers/form_tag_helper.rb
+++ b/actionview/lib/action_view/helpers/form_tag_helper.rb
@@ -691,6 +691,10 @@ module ActionView
       # * <tt>:step</tt> - The acceptable value granularity.
       # * Otherwise accepts the same options as text_field_tag.
       def datetime_field_tag(name, value = nil, options = {})
+        ActiveSupport::Deprecation.warn(<<-MESSAGE.squish)
+          datetime_field_tag is deprecated and will be removed in Rails 5.1.
+          Use datetime_local_field_tag instead.
+        MESSAGE
         text_field_tag(name, value, options.merge(type: :datetime))
       end