Auto_link is not working

sunfish · July 25, 2008, 1:22pm

Hi,
In one of my project I am using auto_link function for providing link to
text.
but when I am using it with truncate it is not working it gives
following error

code:- <%=auto_link truncate(group_user.group.description,200)%>

error:-You have a nil object when you didn’t expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.+

Please anybody can able to solve my problem?

sunfish · July 25, 2008, 2:30pm

Please paste the full application trace. I guess you are getting an
unexpected nil when you are determining description of the group. More
specifically, you are trying to concatenate(+) something with someother
thing and the something is in nil at some instance
auto_link and truncate can handle nil arguments.
Cheers,
Ganesh G.
SageWork(http://sagework.com) Simplify IT

On Fri, Jul 25, 2008 at 5:22 PM, Sunny B. <

sunfish · July 25, 2008, 2:54pm

Ganesh G. wrote:

Please paste the full application trace. I guess you are getting an
unexpected nil when you are determining description of the group. More
specifically, you are trying to concatenate(+) something with someother
thing and the something is in nil at some instance
auto_link and truncate can handle nil arguments.
Cheers,
Ganesh G.
SageWork(http://sagework.com) Simplify IT

On Fri, Jul 25, 2008 at 5:22 PM, Sunny B. <

d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/text_helper.rb:388:in
auto_link_urls' d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/multibyte/chars.rb:61:in gsub’
d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/multibyte/chars.rb:61:in
gsub' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/text_helper.rb:383:in auto_link_urls’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/text_helper.rb:181:in
auto_link' #{RAILS_ROOT}/app/views/groups/list.rhtml:48:in _run_rhtml_47app47views47groups47list46rhtml’
#{RAILS_ROOT}/app/views/groups/list.rhtml:41:in each' #{RAILS_ROOT}/app/views/groups/list.rhtml:41:in _run_rhtml_47app47views47groups47list46rhtml’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:326:in
send' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:326:in compile_and_render_template’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:301:in
render_template' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:260:in render_file’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:806:in
render_file' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:711:in render_with_no_layout’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/layout.rb:247:in
render_without_benchmark' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:50:in render’
d:/ruby/lib/ruby/1.8/benchmark.rb:293:in measure' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:50:in render’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1096:in
perform_action_without_filters' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:632:in call_filter’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:634:in
call_filter' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:638:in call_filter’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:438:in
call' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:637:in call_filter’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:638:in
call_filter' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:449:in call’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:637:in
call_filter' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:619:in perform_action_without_benchmark’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' d:/ruby/lib/ruby/1.8/benchmark.rb:293:in measure’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/rescue.rb:83:in perform_action’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in
send' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in process_without_filters’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:624:in
process_without_session_management_support' d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/session_management.rb:114:in process’
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:330:in
process' d:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in dispatch’
d:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:113:in
handle_dispatch' d:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:79:in service’
d:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in service' d:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in run’
d:/ruby/lib/ruby/1.8/webrick/server.rb:173:in start_thread' d:/ruby/lib/ruby/1.8/webrick/server.rb:162:in start’
d:/ruby/lib/ruby/1.8/webrick/server.rb:162:in start_thread' d:/ruby/lib/ruby/1.8/webrick/server.rb:95:in start’
d:/ruby/lib/ruby/1.8/webrick/server.rb:92:in each' d:/ruby/lib/ruby/1.8/webrick/server.rb:92:in start’
d:/ruby/lib/ruby/1.8/webrick/server.rb:23:in start' d:/ruby/lib/ruby/1.8/webrick/server.rb:82:in start’
d:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:63:in
dispatch' d:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/webrick.rb:59 d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in gem_original_require’
d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
require' d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in require’
d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:342:in
new_constants_in' d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in require’
d:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39
d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_require' d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in require’
script/server:3
-e:4:in `load’
-e:4

sunfish · July 25, 2008, 4:06pm

Hmm,
Looks like you are using rails 1.2.3 and hitting on a known bug.

You have three options

Upgrade rails to the latest version.
Patch rails 1.2.3 installation

Edit
d:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/text_helper.rb

Replace line 372
(?:/(?:(?:[~\w+%-]|(?:[,.;:][^\s$]))+)?)* # path
with
(?:/(?:(?:[~\w+@%=()-]|(?:[,.;:][^\s$]))+)?)* # path

and line 373
(?:?[\w+%&=.;-]+)? # query string
with
(?:?[\w+@%&=.;-]+)? # query string

Add local fixes

Add the following right at the end of your environment.rb

require ‘action_view/helpers/tag_helper’
require ‘html/document’
module ActionView
module Helpers
module TextHelper
def auto_link_urls(text, href_options = {})
extra_options = tag_options(href_options.stringify_keys) || “”
text.gsub(AUTO_LINK_RE) do
all, a, b, c, d = $&, $1, $2, $3, $4
if a =~ /<a\s/i # don’t replace URL’s that are already linked
all
else
text = b + c
text = yield(text) if block_given?
%(#{a}<a href=“#{b==“www.”?“http://www
.”:b}#{c}”#{extra_options}>#{text}#{d})
end
end
end

  private
  AUTO_LINK_RE = %r{
    (                          # leading text
    <\w+.*?>|                # leading HTML tag, or
    [^=!:'"/]|               # leading punctuation, or
    ^                        # beginning of line
    )
    (
    (?:https?://)|           # protocol spec, or
    (?:www\.)                # www.*
    )
    (
    [-\w]+                   # subdomain or domain
    (?:\.[-\w]+)*            # remaining subdomains or domain
    (?::\d+)?                # port
    (?:/(?:(?:[~\w\+@%=\(\)-]|(?:[,.;:][^\s$]))+)?)* # path
    (?:\?[\w\+@%&=.;-]+)?     # query string
    (?:\#[\w\-]*)?           # trailing anchor
    )
    ([[:punct:]]|<|$|)       # trailing text
    }x unless const_defined?(:AUTO_LINK_RE)
  end
end

end

Let me know if that works.

Cheers,
Ganesh G…
SageWork(http://sagework.com) Simplify IT

On Fri, Jul 25, 2008 at 6:54 PM, Sunny B. <