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-rw-r--r--actionpack/CHANGELOG.md2
-rw-r--r--actionpack/lib/action_view/renderer/partial_renderer.rb37
2 files changed, 39 insertions, 0 deletions
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index 869d4704dd..78ac05389c 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -1,5 +1,7 @@
## Rails 4.0.0 (unreleased) ##
+* Adds support for layouts when rendering a partial with a given collection. *serabe*
+
* Allows the route helper `root` to take a string argument. For example, `root 'pages#main'`. *bcardarella*
* Forms of persisted records use always PATCH (via the `_method` hack). *fxn*
diff --git a/actionpack/lib/action_view/renderer/partial_renderer.rb b/actionpack/lib/action_view/renderer/partial_renderer.rb
index ac4c8db50e..245a19deec 100644
--- a/actionpack/lib/action_view/renderer/partial_renderer.rb
+++ b/actionpack/lib/action_view/renderer/partial_renderer.rb
@@ -158,6 +158,43 @@ module ActionView
# Name: <%= user.name %>
# </div>
#
+ # If a collection is given, the layout will be rendered once for each item in the collection. Just think
+ # these two snippets have the same output:
+ #
+ # <%# app/views/users/_user.html.erb %>
+ # Name: <%= user.name %>
+ #
+ # <%# app/views/users/index.html.erb %>
+ # <%# This does not use layouts %>
+ # <ul>
+ # <% users.each do |user| -%>
+ # <li>
+ # <%= render :partial => "user", :locals => { :user => user } %>
+ # </li>
+ # <% end -%>
+ # </ul>
+ #
+ # <%# app/views/users/_li_layout.html.erb %>
+ # <li>
+ # <%= yield %>
+ # </li>
+ #
+ # <%# app/views/users/index.html.erb %>
+ # <ul>
+ # <%= render :partial => "user", :layout => "li_layout", :collection => users %>
+ # </ul>
+ #
+ # Given two users whose names are Alice and Bob, these snippets return:
+ #
+ # <ul>
+ # <li>
+ # Name: Alice
+ # </li>
+ # <li>
+ # Name: Bob
+ # </li>
+ # </ul>
+ #
# You can also apply a layout to a block within any template:
#
# <%# app/views/users/_chief.html.erb &>