Some .erb / herlper.rb nuance I am missing?

Rails
1

this is my view:

    <td align="left">
    <% setupsheets_missing = true
        @series800.setupsheets.each do |sheet|
          setupsheets_missing = false
          %>
          <%=

link_to( image_tag(sheet.public_filename(:small), :border=>1,
:style=>“margin-
right: 3p”),
‘show_setup_sheet’,:popup => [‘sheet window’,
‘height=780,width=620’]) %>
<%
end
if setupsheets_missing
%>
<%=
image_tag("/setupsheets/
missing_small.gif", :border=>1, :style=>“margin-right: 3px”)%>
<%
end %>

It works, but it is damned ugly.
if attachment_fu has saved multiple files, I get a list of thumb
picture links
if it has only saved on I get one thumb picture link
if it hasn’t any I get a image_tag to a thumb bearing the word
“missing”

I would like to replace the abomination in the view code above with:

<%= sheet_links_for(@series800,:small) % >

and a helper routine:

def sheet_links_for(series800,size = :small)
sheets_present = false
series800.setupsheets.each do |sheet|
sheets_present = true

link_to( image_tag(sheet.public_filename(size),
:border=>1,:style=>“margin-
right: 3px”),
‘show_setup_sheet’,:popup => [‘sheet window’,
‘height=780,width=620’])
end
unless sheets_present
image_tag("/setupsheets/
missing_small.gif", :border=>1,:style=>“margin-right: 3px”)
end
end

But no… the ‘missing tag’ does show up, but the two links are
nowhere to be found.

I have been trying to spot the error for the past week… been over
this with a fine tooth comb, substituting image tags for the 2 links.

any ideas?
also is there a clean way to test for sheets present without
introducing a local variable.

Thanks in advance.

2

On Sep 27, 2:01 am, ee_smajors [email protected] wrote:

But no… the ‘missing tag’ does show up, but the two links are
nowhere to be found.

You need to return from the helper the entirety of what you want
rendered. However the return value of your function is either the
missing tag image, or (if sheets_present is true) then just nil. In
the original form this was handled by you using <%= in various points,
but with a helper like this you’ll have to handle this yourself eg
output = “”
output << link_to(…)
…
and then return output from your function

also is there a clean way to test for sheets present without
introducing a local variable.

if series800.setupsheets.any?
…
else
image_tag(“/setupsheets/
missing_small.gif”, :border=>1,:style=>“margin-right: 3px”)
end

Fred

3

Fred,
I did not understand the helper transfer mechanism…
Thank you! :slight_smile: (jubilation, joy, and much happiness :slight_smile: :slight_smile:

Steven

On Sep 27, 1:22 am, Frederick C. [email protected]