From: David Trasbo <davidtrasbo@...>
Date: 2008-10-16T20:34:17+09:00
Subject: Re: A Ruby block question

Stefano Crocco wrote:

>> In other words I need to put user-defined input in between some
>> pre-defined content. How can I approach that?
> 
> If I understand correctly what you want to do, you don't need to do 
> anything
> special:
> 
> def my_method
>   puts "predefined text 1"
>   puts yield
>   puts "predefined text 2"
> end

My method looks like this:

def fields_for_setting(namespace, name, &block)
  namespace = namespace.to_s
  name = name.to_s
  id = "settings_#{namespace}_#{name}_"
  m = Builder::XmlMarkup.new :indent => 2
  fields_for "settings[]", setting = 
Setting.find_or_initialize_by_namespace_and_name(namespace, name) do |f|
    m.p do
      unless setting.new_record?
        m << (f.hidden_field :id, :index => nil, :id => id+"id")
      end
      m << (f.hidden_field :namespace, :index => nil, :id => 
id+"namespace")
      m << (f.hidden_field :name, :index => nil, :id => id+"name")
      #puts yield f???
    end
  end
end

The problem is, I'm using Builder::XmlMarkup and the fields_for from 
Rails. I want to put some hidden fields AND the text fields defined by 
the block into a <p> tag. That means I need to be able to access the f 
object provided by fields_for and use it in this method's block.

But how?
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