1 files changed, 30 insertions, 4 deletions
diff --git a/actionview/test/template/form_helper_test.rb b/actionview/test/template/form_helper_test.rb
index f6181c28fd..e540bf27d9 100644
--- a/actionview/test/template/form_helper_test.rb
+++ b/actionview/test/template/form_helper_test.rb
@@ -1597,7 +1597,8 @@ class FormHelperTest < ActionView::TestCase
       "<input id='post_active_true' name='post[active]' type='radio' value='true' />" +
       "<label for='post_active_true'>true</label>" +
       "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" +
-      "<label for='post_active_false'>false</label>"
+      "<label for='post_active_false'>false</label>" +
+      "<input type='hidden' name='post[active][]' value='' />"
     end
 
     assert_dom_equal expected, output_buffer
@@ -1620,7 +1621,8 @@ class FormHelperTest < ActionView::TestCase
       "true</label>" +
       "<label for='post_active_false'>"+
       "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" +
-      "false</label>"
+      "false</label>" +
+      "<input type='hidden' name='post[active][]' value='' />"
     end
 
     assert_dom_equal expected, output_buffer
@@ -1646,6 +1648,7 @@ class FormHelperTest < ActionView::TestCase
       "<label for='post_active_false'>"+
       "<input checked='checked' id='post_active_false' name='post[active]' type='radio' value='false' />" +
       "false</label>"+
+      "<input type='hidden' name='post[active][]' value='' />" +
       "<input id='post_id' name='post[id]' type='hidden' value='1' />"
     end
 
@@ -1664,7 +1667,8 @@ class FormHelperTest < ActionView::TestCase
       "<input id='foo_post_active_true' name='post[active]' type='radio' value='true' />" +
       "<label for='foo_post_active_true'>true</label>" +
       "<input checked='checked' id='foo_post_active_false' name='post[active]' type='radio' value='false' />" +
-      "<label for='foo_post_active_false'>false</label>"
+      "<label for='foo_post_active_false'>false</label>" +
+      "<input type='hidden' name='post[active][]' value='' />"
     end
 
     assert_dom_equal expected, output_buffer
@@ -1682,7 +1686,8 @@ class FormHelperTest < ActionView::TestCase
       "<input id='post_1_active_true' name='post[1][active]' type='radio' value='true' />" +
       "<label for='post_1_active_true'>true</label>" +
       "<input checked='checked' id='post_1_active_false' name='post[1][active]' type='radio' value='false' />" +
-      "<label for='post_1_active_false'>false</label>"
+      "<label for='post_1_active_false'>false</label>" +
+      "<input type='hidden' name='post[1][active][]' value='' />"
     end
 
     assert_dom_equal expected, output_buffer
@@ -2293,6 +2298,27 @@ class FormHelperTest < ActionView::TestCase
     assert_dom_equal expected, output_buffer
   end
 
+  def test_deep_nested_fields_for
+    @comment.save
+    form_for(:posts) do |f|
+      f.fields_for('post[]', @post) do |f2|
+        f2.text_field(:id)
+        @post.comments.each do |comment|
+          concat f2.fields_for('comment[]', comment) { |c|
+            concat c.text_field(:name)
+          }
+        end
+      end
+    end
+
+    expected = whole_form do
+      "<input name='posts[post][0][comment][1][name]' type='text' id='posts_post_0_comment_1_name' value='comment #1' />"
+    end
+
+    assert_dom_equal expected, output_buffer
+  end
+
+
   def test_nested_fields_for_with_nested_collections
     form_for(@post, as: 'post[]') do |f|
       concat f.text_field(:title)