Add include_seconds option for time_field

Per https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/time#time_value_format, if you format your time without seconds, the UI browsers render may differ. This adds support for this to Rails so that users don't need to call `strftime` on the value being passed into the form.

actionview/CHANGELOG.md

@@ -1,3 +1,17 @@
+*   Add `include_seconds` option for `time_field`
+
+        <%= form.time_field :foo, include_seconds: false %>
+        # => <input value="16:22" type="time" />
+
+    Default includes seconds:
+
+        <%= form.time_field :foo %>
+        # => <input value="16:22:01.440" type="time" />
+
+    This allows you to take advantage of [different rendering options](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/time#time_value_format) in some browsers.
+
+    *Alex Ghiculescu*
+
 *   The `translate` helper now passes `default` values that aren't
     translation keys through `I18n.translate` for interpolation.
 
@@ -49,12 +63,12 @@
     the first argument or as a block.
 
         <%= button_to "Delete", post_path(@post), method: :delete %>
-        <%# => <form action="/posts/1"><input type="hidden" name="_method" value="delete"><button type="submit">Delete</button></form>
+        # => <form action="/posts/1"><input type="hidden" name="_method" value="delete"><button type="submit">Delete</button></form>
 
         <%= button_to post_path(@post), method: :delete do %>
           Delete
         <% end %>
-        <%# => <form action="/posts/1"><input type="hidden" name="_method" value="delete"><button type="submit">Delete</button></form>
+        # => <form action="/posts/1"><input type="hidden" name="_method" value="delete"><button type="submit">Delete</button></form>
 
     *Sean Doyle*, *Dusan Orlovic*
 

actionview/lib/action_view/helpers/form_helper.rb

@@ -1402,8 +1402,9 @@ module ActionView
       # Returns a text_field of type "time".
       #
       # The default value is generated by trying to call +strftime+ with "%T.%L"
-      # on the object's value. It is still possible to override that
-      # by passing the "value" option.
+      # on the object's value. If you pass "include_seconds: false", it will be
+      # formatted by trying to call +strftime+ with "%H:%M" on the object's value.
+      # It is also possible to override this by passing the "value" option.
       #
       # === Options
       # * Accepts same options as time_field_tag
@@ -1424,6 +1425,12 @@ module ActionView
       #   time_field("task", "started_at", min: "01:00:00")
       #   # => <input id="task_started_at" name="task[started_at]" type="time" min="01:00:00.000" />
       #
+      # By default, provided times will be formatted including seconds. You can render just the hour
+      # and minute by passing `include_seconds: false`. Some browsers will render a simpler UI
+      # if you exclude seconds in the timestamp format.
+      #
+      #   time_field("task", "started_at", value: Time.now, include_seconds: false)
+      #   # => <input id="task_started_at" name="task[started_at]" type="time" value="01:00" />
       def time_field(object_name, method, options = {})
         Tags::TimeField.new(object_name, method, self, options).render
       end

actionview/lib/action_view/helpers/form_tag_helper.rb

@@ -713,6 +713,7 @@ module ActionView
       # * <tt>:min</tt> - The minimum acceptable value.
       # * <tt>:max</tt> - The maximum acceptable value.
       # * <tt>:step</tt> - The acceptable value granularity.
+      # * <tt>:include_seconds</tt> - Include seconds and ms in the output timestamp format (true by default).
       # * Otherwise accepts the same options as text_field_tag.
       def time_field_tag(name, value = nil, options = {})
         text_field_tag(name, value, options.merge(type: :time))

actionview/lib/action_view/helpers/tags/time_field.rb

@@ -4,9 +4,18 @@ module ActionView
   module Helpers
     module Tags # :nodoc:
       class TimeField < DatetimeField # :nodoc:
+        def initialize(object_name, method_name, template_object, options = {})
+          @include_seconds = options.delete(:include_seconds) { true }
+          super
+        end
+
         private
           def format_date(value)
-            value&.strftime("%T.%L")
+            if @include_seconds
+              value&.strftime("%T.%L")
+            else
+              value&.strftime("%H:%M")
+            end
           end
       end
     end

actionview/test/template/form_helper_test.rb

@@ -1156,6 +1156,14 @@ class FormHelperTest < ActionView::TestCase
     assert_dom_equal(expected, time_field("post", "written_on", min: min_value, max: max_value))
   end
 
+  def test_time_field_without_seconds
+    expected = %{<input id="post_written_on" name="post[written_on]" type="time" value="01:02" max="10:25" min="20:45" />}
+    @post.written_on = DateTime.new(2004, 6, 15, 1, 2, 3)
+    min_value = DateTime.new(2000, 6, 15, 20, 45, 30)
+    max_value = DateTime.new(2010, 8, 15, 10, 25, 00)
+    assert_dom_equal(expected, time_field("post", "written_on", include_seconds: false, min: min_value, max: max_value))
+  end
+
   def test_datetime_field
     expected = %{<input id="post_written_on" name="post[written_on]" type="datetime-local" value="2004-06-15T00:00:00" />}
     assert_dom_equal(expected, datetime_field("post", "written_on"))