I'm having some issues with blocks and capture in erb templates, and
the particular problem shows itself in that the expected output in the
template view is repeated due to something related to how capture
works. (Using Rails 3.x)
I have the following view helper:
module ColumnLayoutHelper
def layout_columns(options = {}, &content_block)
raise ArgumentError, "No block given" unless block_given?
layout = ColumnLayoutBuilder.new
layout.configure(options)
content = capture(layout, &content_block)
content_tag(:div, content, layout.main_wrapping, false)
end
end
class ColumnLayoutBuilder < Object
include ActionView::Helpers::TagHelper
include ActionView::Helpers::CaptureHelper
attr_accessor :output_buffer, :column_counter
attr_accessor :main_wrapping
attr_accessor :column_wrapping
def configure(options)
@main_wrapping = options.delete(:main_wrapping)
@column_wrapping = options.delete(:column_wrapping)
end
def column(&block)
raise ArgumentError, "No block given" unless block_given?
@column_counter ||= 0
@column_counter = @column_counter + 1
column_html_options = (column_wrapping ? column_wrapping.dup : {})
|| {}
column_html_options.default = ""
column_html_options[:class] = "column_#{column_counter} " +
column_html_options[:class]
column_content = content_tag(:div, capture(self, &block),
column_html_options,false)
column_content
end
end
--
Now if I use this column builder helper with the following erb
template:
<%= layout_columns do |layout| %>
<%= layout.column do %>
content_01
<% end %>
<%= layout.column do %>
content02
<% end %>
<% end %>
I get the following output.
<div>
content_01
<div class="column_1 ">content_01</div>
content02
<div class="column_2 ">
content_01
<div class="column_1 ">content_01</div>
content02
</div>
</div>
As you can see, the buffer in between the captures doesn't seem to be
cleared in the separate block scopes. As I sort of expected how
capture would work...
I guess I'm having the same issues as pointed out here
http://stackoverflow.com/questions/4352167/cant-suppress-output-in-nested-block-helper-in-rails-3
Any ideas on how to fix this? Thanks
--
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Talk" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en.
