Rails - Apr 2009 - ActionMailer view template:

I am attempting to generate a plain text list from an array of arrays.

If I do this:

<% for currency in @rates -%>
  <% if currency[2] == ''USD'' -%>
     <%= currency[2] -%> ............... <%= currency[4] %>
  <% end -%>
<% end -%>

Then I see this:

                                                                                
USD ............... 1.203804
              
If I do this:

<% for currency in @rates -%>
     <%= currency[2] -%> ............... <%= currency[4] %>
<% end -%>

Then I see this:

     AED ............... 0.327697
     ANG ............... 0.6879
     ARS ............... 0.324296
     AUD ............... 0.869868

How is the if statement causing the difference?
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James Byrne wrote:

The problem occurs even if the output line is a literal:

<% if true -%>
  <%= "print this" %>
<% end -%>

<% for currency in @rates -%>
  <% if currency[2] == ''USD'' -%>
    <%= "print this" %>
  <% end -%>
<% end -%>

gives this:

  print this

                                                                                
print this
              
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You are still getting all the indentation from the iterations that are  
skipped (i.e., where the currency is not USD).

<% for currency in @rates -%>
   <% next unless currency[2] == ''USD'' -%>
   <%= currency[2] %> ............... <%= currency[4] %>
<% end -%>

I''m not sure you need the minus sign on an emitting tag (<%=) to  
suppress the linefeed.

Does this help?



On Apr 30, 2009, at 11:49 AM, James Byrne wrote:
>
> I am attempting to generate a plain text list from an array of arrays.
>
> If I do this:
>
> <% for currency in @rates -%>
>  <% if currency[2] == ''USD'' -%>
>     <%= currency[2] -%> ............... <%= currency[4] %>
>  <% end -%>
> <% end -%>
>
> Then I see this:
>
>                                                                        
>                                  USD ............... 1.203804
>              >
> If I do this:
>
> <% for currency in @rates -%>
>     <%= currency[2] -%> ............... <%= currency[4] %>
> <% end -%>
>
> Then I see this:
>
>     AED ............... 0.327697
>     ANG ............... 0.6879
>     ARS ............... 0.324296
>     AUD ............... 0.869868
>
> How is the if statement causing the difference?
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >

Steve Ross wrote:
> You are still getting all the indentation from the iterations that are
> skipped (i.e., where the currency is not USD).
> 
> <% for currency in @rates -%>
>    <% next unless currency[2] == ''USD'' -%>
>    <%= currency[2] %> ............... <%= currency[4] %>
> <% end -%>
> 
> I''m not sure you need the minus sign on an emitting tag (<%=)
to
> suppress the linefeed.
> 
> Does this help?
Yes.  Now that I know what is going on this works as I wish:

<% for currency in @rates
     usdd = "#{currency[2]} ............... #{currency[4]}" if
        currency[2] == ''USD''
   end -%>

      <%=usdd%>
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