Rails - Jan 2008 - Strange behavior with erb template and iteration

Hello,

I''ve noticed a strange problem in my custom generator template.  At
the top of the template, I iterate through the attribute arguments to
extract information and construct a Hash.  Later in the template, I
loop over each_pair of the Hash.  The loop executes (I see my DEBUG
statement) but the block between the loop never makes it from the
template into the output file.


The problem is eliminated if I don''t re-define a.name inside my
attribute iterator.


<%
  table = Hash.new

  attributes.each do |a|
    prefix = get_assoc_prefix(a.name)  #real attribute name
    suffix = get_assoc_suffix(a.name)  #attribute metadata
    table[prefix] = suffix
    a.name = prefix #THIS LINE PREVENTS THE ''if''-block FROM
BEING
ADDED TO THE OUTPUT FILE
  end
%>

class <%= class_name %> < ActiveRecord::Base
  def precedence
    sum = 0
<% ranks_by_attribute.each_pair do |att, rank|
    puts "DEBUG: att=#{att}, rank=#{rank}" #THIS ALWAYS PRINTS %>
    if self.<%= att %>
      sum += <%= rank.to_i %>
    end
<% end %>
    return sum
  end
end


ruby 1.8.6 (2007-09-23 patchlevel 110) [i686-darwin9.1.0]
rails 1.2.5


Am I doing something wrong, or is this a bug?

Thanks,
Tom



--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Opps, bad copy/paste in my simplified case.  "table" or
"ranks_by_attribute" are the same hash.


On Jan 29, 8:38 pm, tom_302
<thomas.she...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hello,
>
> I''ve noticed a strange problem in my custom generator template.
 At
> the top of the template, I iterate through the attribute arguments to
> extract information and construct a Hash.  Later in the template, I
> loop over each_pair of the Hash.  The loop executes (I see my DEBUG
> statement) but the block between the loop never makes it from the
> template into the output file.
>
> The problem is eliminated if I don''t re-define a.name inside my
> attribute iterator.
>
> <%
>   table = Hash.new
>
>   attributes.each do |a|
>     prefix = get_assoc_prefix(a.name)  #real attribute name
>     suffix = get_assoc_suffix(a.name)  #attribute metadata
>     table[prefix] = suffix
>     a.name = prefix #THIS LINE PREVENTS THE ''if''-block
FROM BEING
> ADDED TO THE OUTPUT FILE
>   end
> %>
>
> class <%= class_name %> < ActiveRecord::Base
>   def precedence
>     sum = 0
> <% ranks_by_attribute.each_pair do |att, rank|
>     puts "DEBUG: att=#{att}, rank=#{rank}" #THIS ALWAYS PRINTS
%>
>     if self.<%= att %>
>       sum += <%= rank.to_i %>
>     end
> <% end %>
>     return sum
>   end
> end
>
> ruby 1.8.6 (2007-09-23 patchlevel 110) [i686-darwin9.1.0]
> rails 1.2.5
>
> Am I doing something wrong, or is this a bug?
>
> Thanks,
> Tom
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---