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-rw-r--r--actionpack/lib/action_view/helpers/form_options_helper.rb7
1 files changed, 6 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/form_options_helper.rb b/actionpack/lib/action_view/helpers/form_options_helper.rb
index c677257d60..f895cad058 100644
--- a/actionpack/lib/action_view/helpers/form_options_helper.rb
+++ b/actionpack/lib/action_view/helpers/form_options_helper.rb
@@ -579,7 +579,12 @@ module ActionView
def to_select_tag(choices, options, html_options)
selected_value = options.has_key?(:selected) ? options[:selected] : value(object)
- if !choices.empty? && choices.try(:first).try(:second).respond_to?(:each)
+ # Grouped choices look like this:
+ #
+ # [nil, []]
+ # { nil => [] }
+ #
+ if !choices.empty? && Array === choices.first.last
option_tags = grouped_options_for_select(choices, :selected => selected_value, :disabled => options[:disabled])
else
option_tags = options_for_select(choices, :selected => selected_value, :disabled => options[:disabled])