Rails - Feb 2005 - Amrita2 initial release

I released Amrita2 1.9.1, the first version of new Amrita.
Get it from

   http://rubyforge.org/projects/amrita2/

This release contains Amrita2-Rails bridge based on Jamis Buck''s work
and the Amrita2 version of Todo list Tutorial.

Here is one of two Amrita2-Rails sample applications. I think you can
get a feeling of Amrita2 if you know Todo list tutorial of Rails.

  http://manuals.rubyonrails.com/read/book/7

A part of template
---------------------------------------------------------------------------
    Not done:<br />
    <div id=''not_done''>
       <input id="item_done" name="item[done]"
type="checkbox" value="1" />
       <span> </span>
       <span id=''description'' />
       <span> </span>
       <a id=''edit_link''
href="/todo/edit/">Edit</a>
       <span> </span>
       <a id=''destroy_link''
href="/todo/destroy/">
       Destroy</a> 

    </div>
---------------------------------------------------------------------------

Helper methods for VIEW code.
---------------------------------------------------------------------------
module TodoHelper
  # Presentation Object for Todo Record
  class TodoPO
    def initialize(r)
      @r = r
    end

    # passive PO method: 
    # The result of this method will be inserted in HTML output.
    def description
      @r.description
    end

    # active PO method:
    # m is a template Module with method for dynamic element.
    # If a method has a parameter for it, one of methods of that module
    # should be called by PO object.
    def item_done(m)
      m.item_done(nil, :onclick =>
%[document.location.href="/todo/toggle_check/#{@r.id}"])
    end

    def edit_link(m)
      m.edit_link("Edit", :href=>"/todo/edit/#{@r.id}")
    end

    def destroy_link(m)
      m.destroy_link("Destroy",
:href=>"/todo/destroy/#{@r.id}",
                     :onclick=>%[return confirm("Are you sure you want
to delete this entry: #{description}")])
    end
  end

  # Presentation Object for ''list'' method
  # The result of this method will be used by Amrita2 for tempalte expansion
  def list_po
    {
      :done => controller.done.collect do |r|
        TodoPO.new(r)
      end,
      :not_done => controller.not_done.collect do |r|
        TodoPO.new(r)
      end
    }
  end
end
---------------------------------------------------------------------------

And there is another version which I think is more flexible and better
for maintainance. This version uses the new parts template like this.
---------------------------------------------------------------------------
       <div id=''parts''>
         <input id=''checkbox_on''
checked="checked" type="checkbox"
           value="$1"
onclick=''document.location.href="$2"'' />
         <input id=''checkbox_off'' 
type="checkbox" value="$1"
           onclick=''document.location.href="$2"''
/>
         <a id=''link'' href="$2">$1</a> 
         <a id=''confirm_link'' href="$2"
onclick="return confirm(''$3'');">$1</a>
       </div>
---------------------------------------------------------------------------

The view codes uses these fragments and body template . So everything
in the view is in HTML format and separated from view code. You can
modify each independently.

---
Taku Nakajima