Betternestedset talk - May 2007 - Trouble with tree view

Hi all,

I''m struggling a bit with displaying a subtree with all the child nodes
of a
node. A node in this case is an Agent model extending ActiveRecord::Base and 
using acts_as_nested_set :scope => :product_id.

I would like to generate the below HTML code that displays a tree. The ASCII 
connectors can easily be replaced by icons.

<table border=0 cellspacing=0 cellpadding=0>
<tr><td nowrap><b>node 1</b></td></tr>
<tr><td>
<table border=0 cellspacing=0 cellpadding=0>
<tr>
<table border=0 cellspacing=0 cellpadding=0>
<tr><td nowrap>|-</td><td nowrap>node
1.1</td></tr></table>
</tr>
<tr>
<table border=0 cellspacing=0 cellpadding=0>
<tr><td nowrap>|-</td><td nowrap>node
1.2</td></tr></table>
</tr>
<tr><td>
<table border=0 cellspacing=0 cellpadding=0>
<tr>
<table border=0 cellspacing=0 cellpadding=0>
<tr><td nowrap>|&nbsp;&nbsp;</td><td
nowrap>|-</td><td nowrap>node
1.2.1</td></tr></table>
</tr>
<tr>
<table border=0 cellspacing=0 cellpadding=0>
<tr><td nowrap>|&nbsp;&nbsp;</td><td
nowrap>\-</td><td nowrap>node
1.2.2</td></tr></table>
</tr>
</table>
</td></tr>
<tr>
<table border=0 cellspacing=0 cellpadding=0>
<tr><td nowrap>\-</td><td nowrap>node
1.3</td></tr></table>
</tr>
</table>
</td></tr>
<tr><td nowrap>node 2</td></tr>
</table>

I have this method defined in the AgentsHelper module:

  def show_agents_tree(current_agent, child_agents)
    html = "<table class=\"agent-tree\">\n"
    html += "<tr><td
nowrap>#{agent_link(current_agent)}</td></tr>\n"
    if !agents.empty?
      html += "<tr><td>\n"    
      html += show_agents_tree(agents.shift, child_agents)
      html += "</td></tr>\n"      
    end
    html += "</table>\n"
  end

It generates HTML code that just displays each agent as a child of the 
previous agent. Can anyone help me to get the right level (O, 1, 2, ...) 
dependent indentation working? Any help is appreciated.

Thanks,

Mark

Hi,

Le 24 mai 07 ? 23:12, Noten Mark a ?crit :
> I''m struggling a bit with displaying a subtree with all the child
> nodes of a
> node. A node in this case is an Agent model extending  
> ActiveRecord::Base and
> using acts_as_nested_set :scope => :product_id.
I just posted on
http://opensource.symetrie.com/trac/better_nested_set/wiki/RecursiveMenu

an example of a helper I use to display a dynamic menu with selected  
path developped
(only the hierarchies in the selected path are open). Hope it will  
help with your question.

Jean-Christophe Michel
--
symetrie.com

Better Nested Set for rails:
http://opensource.symetrie.com/trac/better_nested_set