Rails - Dec 2006 - RXML partial question

All,

I have a RXML template which renders partial RXML templates within it.

A snippet is below.  The "xml" variable is the parent
template''s Builder
variable.  It is passed into the partial under the name "parent_xml".

Why can''t I use :locals => {.... :xml => xml ....} in my call to
render
the partial?  It seems like if I do use :xml => xml, it doesn''t
work,
and I am forced to pass into a local variable with a name other than
"xml", for example, "parent_xml".

Thanks,
Wes

========== snippet of main template ===============
xml.tbody do
  objects.each do |obj|
    xml.tr do
      render(:partial => ''common/list_buttons_display'',
             :layout => false,
             :locals => {:parent_xml => xml,
                         :buttons => buttons,
                         :obj => obj}) if buttons_first

========== snippet of RXML partial  ===============
columns.each do |col_array|
  attr_name = col_array[0]
  column_display_name = col_array[1]
  value = eval("obj.#{attr_name}")
  column_contents = (column_display_name == ''Fax Number'' ?
                       number_to_phone(value, {:area_code => true}) :
                       value)
  parent_xml.td(column_contents, :id => "#{obj.id}_#{attr_name}")
end

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rxml templates automatically instantiate a xml builder object under the 
"xml" variable, so if you are passing it from the parent, you are 
getting it overriden by the one created at the beginning of the template.

what i usually do is pass it under another name (parent_xml is perfect) 
and then do something like

xml = parent_xml unless parent_xml.nil?

this way you can consistently use the "xml" variable as your root 
element throughout all the templates/partials

regards,

javier

Wes Gamble wrote:
> All,
>
> I have a RXML template which renders partial RXML templates within it.
>
> A snippet is below.  The "xml" variable is the parent
template''s Builder
> variable.  It is passed into the partial under the name
"parent_xml".
>
> Why can''t I use :locals => {.... :xml => xml ....} in my
call to render
> the partial?  It seems like if I do use :xml => xml, it doesn''t
work,
> and I am forced to pass into a local variable with a name other than
> "xml", for example, "parent_xml".
>
> Thanks,
> Wes
>
> ========== snippet of main template ===============>
> xml.tbody do
>   objects.each do |obj|
>     xml.tr do
>       render(:partial =>
''common/list_buttons_display'',
>              :layout => false,
>              :locals => {:parent_xml => xml,
>                          :buttons => buttons,
>                          :obj => obj}) if buttons_first
>
> ========== snippet of RXML partial  ===============>
> columns.each do |col_array|
>   attr_name = col_array[0]
>   column_display_name = col_array[1]
>   value = eval("obj.#{attr_name}")
>   column_contents = (column_display_name == ''Fax Number''
?
>                        number_to_phone(value, {:area_code => true}) :
>                        value)
>   parent_xml.td(column_contents, :id =>
"#{obj.id}_#{attr_name}")
> end
>
>   

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Javier,

Thanks.  I suspected that xml was the "default variable".

Wes

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