# Help with form\_for

**URL:** <https://www.ruby-forum.com/t/help-with-form-for/141798>\
**Category:** Rails\
**Created:** [June 30, 2008, 5:54pm UTC](https://www.ruby-forum.com/t/help-with-form-for/141798 "2008-06-30T17:54:20Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![eyp](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e274bd/32.png) [@eyp](https://www.ruby-forum.com/u/eyp)\
**Post date:** [June 30, 2008, 5:54pm UTC](https://www.ruby-forum.com/t/help-with-form-for/141798/1 "2008-06-30T17:54:20Z")

</div>

Hello, I had an app running on RoR 1.1, now I’m migrating it to 2.1.

In a view I have:

 Please log in \<% form\_for(:user, :url =\> sessions\_path) do |f| %\> 

Username: \<%= flash[:notice]%\>

 \<%= f.text\_field :username %\> 

Password:

 \<%= f.password\_field :password %\> \<%= submit\_tag 'Go!'%\> 

Register \<%= link\_to 'New user?', new\_user\_path %\>

 \<% end %\> 

Rendering it, the server gives this error, but I don’t know what it  
means. Any idea?

wrong argument type FalseClass (expected Proc)

Extracted source (around line #4):

1:

  
2:   
3: Please log in  
4: \<% form\_for(:user, :url =\> {:action =\> :create}) do |f| %\>  
5: 

Username: \<%= flash[:notice]%\>\</  
span\>

  
6: \<%= f.text\_field :username %\>  
7: 

Password:

RAILS\_ROOT: /home/eyp/workspace/lists  
Application Trace | Framework Trace | Full Trace

(eval):2:in `protect_against_forgery?' app/views/sessions/new.rhtml:4:in`\_run\_erb\_47app47views47sessions47new46rhtml’

/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/helpers/  
form\_tag\_helper.rb:431:in `extra_tags_for_form' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/ form_tag_helper.rb:439:in`form\_tag\_html’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/helpers/  
form\_tag\_helper.rb:41:in `form_tag' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/ form_helper.rb:252:in`form\_for’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/base.rb:  
338:in `send' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/base.rb: 338:in`execute’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/  
template\_handlers/compilable.rb:29:in `send' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ template_handlers/compilable.rb:29:in`render’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/  
template.rb:35:in `render' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ template.rb:22:in`render\_template’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/base.rb:  
245:in `render_file' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:1108:in`render\_for\_file’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
base.rb:841:in `render_with_no_layout' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ layout.rb:251:in`render\_without\_benchmark’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
benchmarking.rb:51:in `render' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ core_ext/benchmark.rb:8:in`realtime’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
benchmarking.rb:51:in `render' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:1157:in`default\_render’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
base.rb:1163:in `perform_action_without_filters' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ filters.rb:580:in`call\_filters’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
filters.rb:573:in `perform_action_without_benchmark' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ benchmarking.rb:68:in`perform\_action\_without\_rescue’  
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ benchmarking.rb:68:in`perform\_action\_without\_rescue’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
rescue.rb:201:in `perform_action_without_caching' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ caching/sql_cache.rb:13:in`perform\_action’  
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active\_record/  
connection\_adapters/abstract/query\_cache.rb:33:in `cache' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/ query_cache.rb:8:in`cache’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
caching/sql\_cache.rb:12:in `perform_action' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:529:in`send’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
base.rb:529:in `process_without_filters' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ filters.rb:569:in`process\_without\_session\_management\_support’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
session\_management.rb:130:in `process' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:389:in`process’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
dispatcher.rb:149:in `handle_request' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ dispatcher.rb:107:in`dispatch’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
dispatcher.rb:104:in `synchronize' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ dispatcher.rb:104:in`dispatch’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
dispatcher.rb:120:in `dispatch_cgi' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ dispatcher.rb:35:in`dispatch’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:76:in  
`process' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in`synchronize’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in  
`process' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:159:in`process\_client’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in  
`each' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in`process\_client’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in  
`run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in`initialize’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in  
`new' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in  
`initialize' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in`new’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in  
`run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/ configurator.rb:282:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/  
configurator.rb:281:in `each' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/ configurator.rb:281:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel\_rails:128:in  
`run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/command.rb: 212:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel\_rails:281  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:502:in `load' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:502:in`load’  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:354:in `new_constants_in' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:502:in`load’  
/usr/lib64/ruby/gems/1.8/gems/rails-2.1.0/lib/commands/servers/  
mongrel.rb:64  
/usr/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem_original_require' /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:509:in `require' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:354:in`new\_constants\_in’  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:509:in `require' /usr/lib64/ruby/gems/1.8/gems/rails-2.1.0/lib/commands/server.rb:39 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
/usr/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `require’  
script/server:3

(eval):2:in `protect_against_forgery?' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/ form_tag_helper.rb:431:in`extra\_tags\_for\_form’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/helpers/  
form\_tag\_helper.rb:439:in `form_tag_html' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/ form_tag_helper.rb:41:in`form\_tag’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/helpers/  
form\_helper.rb:252:in `form_for' app/views/sessions/new.rhtml:4:in`\_run\_erb\_47app47views47sessions47new46rhtml’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/base.rb:  
338:in `send' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/base.rb: 338:in`execute’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/  
template\_handlers/compilable.rb:29:in `send' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ template_handlers/compilable.rb:29:in`render’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/  
template.rb:35:in `render' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/ template.rb:22:in`render\_template’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_view/base.rb:  
245:in `render_file' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:1108:in`render\_for\_file’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
base.rb:841:in `render_with_no_layout' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ layout.rb:251:in`render\_without\_benchmark’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
benchmarking.rb:51:in `render' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ core_ext/benchmark.rb:8:in`realtime’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
benchmarking.rb:51:in `render' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:1157:in`default\_render’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
base.rb:1163:in `perform_action_without_filters' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ filters.rb:580:in`call\_filters’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
filters.rb:573:in `perform_action_without_benchmark' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ benchmarking.rb:68:in`perform\_action\_without\_rescue’  
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ benchmarking.rb:68:in`perform\_action\_without\_rescue’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
rescue.rb:201:in `perform_action_without_caching' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ caching/sql_cache.rb:13:in`perform\_action’  
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active\_record/  
connection\_adapters/abstract/query\_cache.rb:33:in `cache' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.1.0/lib/active_record/ query_cache.rb:8:in`cache’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
caching/sql\_cache.rb:12:in `perform_action' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:529:in`send’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
base.rb:529:in `process_without_filters' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ filters.rb:569:in`process\_without\_session\_management\_support’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
session\_management.rb:130:in `process' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ base.rb:389:in`process’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
dispatcher.rb:149:in `handle_request' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ dispatcher.rb:107:in`dispatch’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
dispatcher.rb:104:in `synchronize' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ dispatcher.rb:104:in`dispatch’  
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action\_controller/  
dispatcher.rb:120:in `dispatch_cgi' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/ dispatcher.rb:35:in`dispatch’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:76:in  
`process' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in`synchronize’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in  
`process' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:159:in`process\_client’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in  
`each' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in`process\_client’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in  
`run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in`initialize’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in  
`new' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in  
`initialize' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in`new’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in  
`run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/ configurator.rb:282:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/  
configurator.rb:281:in `each' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/ configurator.rb:281:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel\_rails:128:in  
`run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/command.rb: 212:in`run’  
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel\_rails:281  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:502:in `load' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:502:in`load’  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:354:in `new_constants_in' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:502:in`load’  
/usr/lib64/ruby/gems/1.8/gems/rails-2.1.0/lib/commands/servers/  
mongrel.rb:64  
/usr/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem_original_require' /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:509:in `require' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/ dependencies.rb:354:in`new\_constants\_in’  
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active\_support/  
dependencies.rb:509:in `require' /usr/lib64/ruby/gems/1.8/gems/rails-2.1.0/lib/commands/server.rb:39 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
/usr/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `require’  
script/server:3

---

<div class="post-metadata">

**Author:** ![eyp](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/e274bd/32.png) [@eyp](https://www.ruby-forum.com/u/eyp)\
**Post date:** [July 1, 2008, 9:54am UTC](https://www.ruby-forum.com/t/help-with-form-for/141798/2 "2008-07-01T09:54:51Z")

</div>

It seems that was nothing, today a new update for ruby 1.8.6 on Fedora  
8 has resolved the issue! :). After updating, all wroked fine, again.