From: "David A. Black" <dblack@...>
Date: 2008-10-17T19:25:52+09:00
Subject: Re: A Ruby block question

Hi --

On Fri, 17 Oct 2008, David Trasbo wrote:

> David Trasbo wrote:
>
>>> So maybe inside your block you want to concatenate the two strings.
>>
>> Okay, I'm using #concat instead. It works just fine, thanks!
>
> I must have overseen something. Today it doesn't work very well. I do
> get my label and text field but I don't get the surrounding <p> tag and
> the hidden fields. My methods looks like this:
>
> def fields_for_setting(namespace, name)
>  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")
>      m << yield(f)
>    end
>  end
> end
>
> def text_field_for_setting(namespace, name, label=nil)
>  namespace = namespace.to_s
>  name = name.to_s
>  label ||= "#{namespace.capitalize} #{name}"
>  id = "settings_#{namespace}_#{name}_"
>  fields_for_setting(namespace, name) do |f|
>    concat f.label :value, label, :index => nil, :for => id+"value"
>    concat f.text_field :value, :index => nil, :id => id+"value"
>  end
> end
>
> So, I'm concatenating the label and text field inside the
> fields_for_setting block. But the fields_for_setting block doesn't have
> any effect at all! I think it's because fields_for_setting is only
> _returning_ the <p> and hidden fields, but how is this solved?

Try this:

   fields_for_setting(namespace, name) do |f|
     f.label :value, label, :index => nil, :for => id+"value" +
     f.text_field :value, :index => nil, :id => id+"value"
   end

i.e., returning a string from the block.


David

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