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-rw-r--r--actionpack/lib/action_view/partials.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/partials.rb b/actionpack/lib/action_view/partials.rb
index fe2b4be79c..e078c52262 100644
--- a/actionpack/lib/action_view/partials.rb
+++ b/actionpack/lib/action_view/partials.rb
@@ -33,6 +33,9 @@ module ActionView
# This will render "advertiser/_ad.rhtml" and pass the local variable +ad+ to the template for display. An iteration counter
# will automatically be made available to the template with a name of the form +partial_name_counter+. In the case of the
# example above, the template would be fed +ad_counter+.
+ #
+ # NOTE: Due to backwards compatibility concerns, the collection can't be one of hashes. Normally you'd also just keep domain objects,
+ # like Active Records, in there.
#
# == Rendering shared partials
#