method

capture

v1.2.6 - Show latest stable - Class: ActionView::Helpers::CaptureHelper

capture(*args, &block)

public

Capture allows you to extract a part of the template into an instance variable. You can use this instance variable anywhere in your templates and even in your layout.

Example of capture being used in a .rhtml page:

  <% @greeting = capture do %>
    Welcome To my shiny new web page!
  <% end %>

Example of capture being used in a .rxml page:

  @greeting = capture do
    'Welcome To my shiny new web page!'
  end

# File actionpack/lib/action_view/helpers/capture_helper.rb, line 56
      def capture(*args, &block)
        # execute the block
        begin
          buffer = eval("_erbout", block.binding)
        rescue
          buffer = nil
        end
        
        if buffer.nil?
          capture_block(*args, &block)
        else
          capture_erb_with_buffer(buffer, *args, &block)
        end
      end

2Notes

Passing arguments to block

stevo · Feb 22, 20117 thanks

To pass arguments to block being captured, just list them as capture method params. I.e.

def export(exportable, export_klass, options={}, &block)
result = ""
#...
if block_given?
  result += capture(my_custom_var_i_want_to_pass_to_block, &block)
end
result
end

Then simply...

<%= export(@a, @b) do |my_custom_var| %>

<% if my_custom_var.nil? %> My custom var is nil!!! <% end %> <% end %>

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tommy_lam · Sep 15, 2012

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capture

2Notes

Passing arguments to block

Coding test and analyzer @ DupCode

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