Support for multiple string arguments to frame helper

This fixes a regression in 1.5.0

Fixes #503

app/helpers/turbo/frames_helper.rb

@@ -24,6 +24,9 @@ module Turbo::FramesHelper
   #   <% end %>
   #   # => <turbo-frame id="tray"><div>My tray frame!</div></turbo-frame>
   #
+  #   <%= turbo_frame_tag [user_id, "tray"], src: tray_path(tray) %>
+  #   # => <turbo-frame id="1_tray" src="http://example.com/trays/1"></turbo-frame>
+  #
   # The `turbo_frame_tag` helper will convert the arguments it receives to their
   # `dom_id` if applicable to easily generate unique ids for Turbo Frames:
   #
@@ -36,7 +39,7 @@ module Turbo::FramesHelper
   #   <%= turbo_frame_tag(Article.find(1), Comment.new) %>
   #   # => <turbo-frame id="article_1_new_comment"></turbo-frame>
   def turbo_frame_tag(*ids, src: nil, target: nil, **attributes, &block)
-    id = ids.first.respond_to?(:to_key) ? ActionView::RecordIdentifier.dom_id(*ids) : ids.first
+    id = ids.first.respond_to?(:to_key) ? ActionView::RecordIdentifier.dom_id(*ids) : ids.join('_')
     src = url_for(src) if src.present?
 
     tag.turbo_frame(**attributes.merge(id: id, src: src, target: target).compact, &block)

test/frames/frames_helper_test.rb

@@ -21,12 +21,16 @@ class Turbo::FramesHelperTest < ActionView::TestCase
     assert_dom_equal %(<turbo-frame id="message_1"></turbo-frame>), turbo_frame_tag(record)
   end
 
-  test "string frame nested withing a model frame" do
+  test "string frame within a model frame" do
     record = Article.new(id: 1)
 
     assert_dom_equal %(<turbo-frame id="comments_article_1"></turbo-frame>), turbo_frame_tag(record, "comments")
   end
 
+  test "string frame with non-record array" do
+    assert_dom_equal %(<turbo-frame id="foo_1_2"></turbo-frame>), turbo_frame_tag(['foo', 1, 2])
+  end
+
   test "block style" do
     assert_dom_equal(%(<turbo-frame id="tray"><p>tray!</p></turbo-frame>), turbo_frame_tag("tray") { tag.p("tray!") })
   end