Flowdock
method

_layout_for

Importance_2
v3.0.0 - Show latest stable - 0 notes - Class: ActionView::Layouts
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  • What's this?
_layout_for(*args, &block) public

Returns the contents that are yielded to a layout, given a name or a block.

You can think of a layout as a method that is called with a block. If the user calls yield :some_name, the block, by default, returns content_for(:some_name). If the user calls simply yield, the default block returns content_for(:layout).

The user can override this default by passing a block to the layout: 

  # The template
  <%= render :layout => "my_layout" do %>
    Content
  <% end %>

  # The layout
  <html>
    <%= yield %>
  </html>

In this case, instead of the default block, which would return content_for(:layout), this method returns the block that was passed in to render :layout, and the response would be 

  <html>
    Content
  </html>

Finally, the block can take block arguments, which can be passed in by yield: 

  # The template
  <%= render :layout => "my_layout" do |customer| %>
    Hello <%= customer.name %>
  <% end %>

  # The layout
  <html>
    <%= yield Struct.new(:name).new("David") %>
  </html>

In this case, the layout would receive the block passed into render :layout, and the struct specified would be passed into the block as an argument. The result would be 

  <html>
    Hello David
  </html>
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