Generate nested elements in a fast way

By using the render collection short cut Rails uses template caching to speed up rendering the nested elements collection.

lib/rails/generators/alchemy/elements/templates/view.html.erb

@@ -10,9 +10,7 @@
     <%- end -%>
   <%- end -%>
   <%- if @element['nestable_elements'].present? -%>
-    <%% <%= @element_name %>_view.nested_elements.available.each do |nested_element| %>
-      <%%= render_element(nested_element) %>
-    <%% end %>
+    <%%= render <%= @element_name %>_view.nested_elements.available %>
   <%- end -%>
   <%%- end -%>
 <%%- end -%>

lib/rails/generators/alchemy/elements/templates/view.html.haml

@@ -9,6 +9,5 @@
     <%- end -%>
   <%- end -%>
   <%- if @element['nestable_elements'].present? -%>
-    - <%= @element_name -%>_view.nested_elements.available.each do |nested_element|
-      = render_element(nested_element)
+    = render <%= @element_name -%>_view.nested_elements.available
   <%- end -%>

lib/rails/generators/alchemy/elements/templates/view.html.slim

@@ -9,6 +9,5 @@
     <%- end -%>
   <%- end -%>
   <%- if @element['nestable_elements'].present? -%>
-    - <%= @element_name -%>_view.nested_elements.available.each do |nested_element|
-      = render_element(nested_element)
+    = render <%= @element_name -%>_view.nested_elements.available
   <%- end -%>

spec/dummy/app/views/alchemy/elements/_gallery_view.html.erb

@@ -1,9 +1,7 @@
 <%- cache(gallery_view) do -%>
   <%= element_view_for(gallery_view) do |el| -%>
     <div class="gallery_images">
-      <% gallery_view.nested_elements.available.each do |nested_element| %>
-        <%= render_element(nested_element) %>
-      <% end %>
+      <%= render gallery_view.nested_elements.available %>
     </div>
   <%- end -%>
 <%- end -%>

spec/dummy/app/views/alchemy/elements/_left_column_view.html.erb

@@ -1,7 +1,5 @@
 <%- cache(left_column_view) do -%>
   <%= element_view_for(left_column_view) do |el| -%>
-    <% left_column_view.nested_elements.available.each do |nested_element| %>
-      <%= render_element(nested_element) %>
-    <% end %>
+    <%= render left_column_view.nested_elements.available %>
   <%- end -%>
 <%- end -%>

spec/dummy/app/views/alchemy/elements/_right_column_view.html.erb

@@ -1,8 +1,6 @@
 <%- cache(right_column_view) do -%>
   <%= element_view_for(right_column_view) do |el| -%>
     <%= el.render :title %>
-    <% right_column_view.nested_elements.available.each do |nested_element| %>
-      <%= render_element(nested_element) %>
-    <% end %>
+    <%= render right_column_view.nested_elements.available %>
   <%- end -%>
 <%- end -%>