instance method `capture`

Ruby on Rails 2.3.18

Since v2.2.3

Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

capture(*args, &block)

The capture method allows you to extract part of a template into a variable. You can then use this variable anywhere in your templates or layout.

Examples

The capture method can be used in ERb templates…

<% @greeting = capture do %>
  Welcome to my shiny new web page!  The date and time is
  <%= Time.now %>
<% end %>

…and Builder (RXML) templates.

@timestamp = capture do
  "The current timestamp is #{Time.now}."
end

You can then use that variable anywhere else. For example:

<html>
<head><title><%= @greeting %></title></head>
<body>
<b><%= @greeting %></b>
</body></html>

Parameters

args rest
block block

Source

# File actionpack/lib/action_view/helpers/capture_helper.rb, line 33
      def capture(*args, &block)
        # Return captured buffer in erb.
        if block_called_from_erb?(block)
          with_output_buffer { block.call(*args) }
        else
          # Return block result otherwise, but protect buffer also.
          with_output_buffer { return block.call(*args) }
        end
      end

Defined in actionpack/lib/action_view/helpers/capture_helper.rb line 33 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActionView::Helpers::CaptureHelper

Signature

Examples

Parameters