From: Jan Svitok <jan.svitok@...>
Date: 2007-03-15T07:44:00+09:00
Subject: Re: question about mod_ruby, eruby and ajax

On 3/14/07, Fei Liu <feiliu@aepnetworks.com> wrote:
> Hi Group, I have a question about eruby. I keep getting the following
> error. I get the same error in apache error log when I try to view it in
> firefox. How do I fix it:
>
> eruby pique.rhtml
> pique.rhtml:1: undefined method `form_remote_tag' for main:Object
> (NoMethodError)
> --- generated code ---
> print(( form_remote_tag :url => { :action => 'whet' } )); print "   \n"
> print "Enter your name: "; print(( text_field_tag :name )); print " \n"
> print(( submit_tag "Greet Me" )); print " \n"
> print(( end_form_tag )); print " \n"
> print "<h2 id=\"greeting\" style=\"display: none\"></h2>\n"
> ----------------------
>
> Installed RPMS (on FC5):
> eruby-libs-1.0.5-5.2.1
> ruby-devel-1.8.5.2-1.fc5
> ruby-irb-1.8.5.2-1.fc5
> ruby-1.8.5.2-1.fc5
> ruby-mode-1.8.4-8.fc5
> ruby-rdoc-1.8.5.2-1.fc5
> eruby-1.0.5-5.2.1
> ruby-libs-1.8.5.2-1.fc5
> rubygems-0.9.2-1.fc5
>
> eruby]$ more *
> ::::::::::::::
> pique.rhtml
> ::::::::::::::
> <%= form_remote_tag :url => { :action => 'whet' } %>
> Enter your name: <%= text_field_tag :name %>
> <%= submit_tag "Greet Me" %>
> <%= end_form_tag %>
> <h2 id="greeting" style="display: none"></h2>
> ::::::::::::::
> whet.rjs
> ::::::::::::::
> page[:greeting].hide page[:greeting].update "Greetings, " + params[:name]
> page[:greeting].visual_effect :grow
> page.select("form").first.reset
>
>
> more mod_ruby.conf:
> # ClearModuleList
> # AddModule mod_ruby.c
>
> <IfModule !mod_ruby.c>
>   LoadModule ruby_module /usr/lib/httpd/modules/mod_ruby.so
> #  AddType text/html .rhtml
>   AddType application/x-httpd-cgi .rhtml
>   RubyRequire apache/eruby-run
>
>   # Execute files under /ruby as Ruby scripts
>   <Location /eruby>
>   SetHandler ruby-object
>   RubyHandler Apache::ERubyRun.instance
>   </Location>
>
>   # Execute *.rbx files as Ruby scripts
>   <Files *.rbx>
>   SetHandler ruby-object
>   RubyHandler Apache::ERubyRun.instance
>   </Files>
>   <Files *.rhtml>
>   SetHandler ruby-object
>   RubyHandler Apache::ERubyRun.instance
>   </Files>
> <Directory /home/devel/public_html/eruby>
>     Options ExecCGI
> </Directory>
> </IfModule>
>
> gem list:
> *** LOCAL GEMS ***
>
> actionmailer (1.3.3)
>     Service layer for easy email delivery and testing.
>
> actionpack (1.13.3)
>     Web-flow and rendering framework putting the VC in MVC.
>
> actionwebservice (1.2.3)
>     Web service support for Action Pack.
>
> activerecord (1.15.3)
>     Implements the ActiveRecord pattern for ORM.
>
> activesupport (1.4.2)
>     Support and utility classes used by the Rails framework.
>
> cgi_multipart_eof_fix (2.1)
>     Fix an exploitable bug in CGI multipart parsing which affects Ruby
>     <= 1.8.5 when multipart boundary attribute contains a non-halting
>     regular expression string.
>
> daemons (1.0.5)
>     A toolkit to create and control daemons in different ways
>
> fastthread (0.6.4.1)
>     Optimized replacement for thread.rb primitives
>
> gem_plugin (0.2.2)
>     A plugin system based only on rubygems that uses dependencies only
>
> mongrel (1.0.1)
>     A small fast HTTP library and server that runs Rails, Camping, Nitro
>     and Iowa apps.
>
> rails (1.2.3)
>     Web-application framework with template engine, control-flow layer,
>     and ORM.
>
> rake (0.7.2)
>     Ruby based make-like utility.
>
> sources (0.0.1)
>     This package provides download sources for remote gem installation

Hi,

form_remote_tag is from the ActionPack, To be able to use it you need
to require it somehow, something like:

require 'rubygems'
gem 'actionpack'
require 'actionview/helpers/prototype_helper'

(maybe you'll need to prepend lib/ to actionview)
and probably you'll need to reference prototype.js from your html pages.