Auto_link generating error (nil.gsub) in functional test

Rails
1

Hi everyone,

When running tests, I get this error for running auto_link on a set of
column data:

test_list(PersonnelControllerTest):
ActionView::TemplateError: You have a nil object when you didn’t expect
it!
The error occured while evaluating nil.gsub
On line #28 of app/views/personnel/list.rhtml

25:   <tr valign="top" class="<%= alternate_rows %>">
26:   <% display_columns = ["username", "preferred_name", "email",

“title”] %>
27: <% display_columns.each do |column| %>
28:

<%= auto_link(person.send(column)) %>
29: <% end %>
30: <%= link_to ‘Details’, :action => ‘show’, :id => person
%>
31:

Only one of the pieces of data ends up with a link (the email), so
this is probably bad design anyway. How can I handle auto-linking the
email address in this situation?

Thanks,

Sean