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• How do I run a ruby script, that I put in my /lib/tasks/ directory in my Rails app, once?

  - by marcamillion

  Eventually I would like to get to setting it up as a Rake task and do a cron job, but for right now...all I want to do is take my ruby script that used to work as a standalone script and have it work within my Rails app. I renamed the file to be .rake instead of .rb and tried doing rake my_script at the command-line, but that gave me this error message: rake aborted! Don't know how to build task 'my_script' (See full trace by running task with --trace) How do I run this script within my Rails environment? This is the first time I am doing something like this, so any assistance would be greatly appreciated. Thanks.

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• Calling another ruby script from a ruby script

  - by Andrew Grimm

  In ruby, is it possible to specify to call another ruby script using the same ruby interpreter as the original script is being run by? For example, if a.rb runs b.rb a couple of times, is it possible to replace system("ruby", "b.rb", "foo", "bar") with something like run_ruby("b.rb", "foo", "bar") so that if you used ruby1.9.1 a.rb on the original, ruby1.9.1 would be used on b.rb, but if you just used ruby a.rb on the original, ruby would be used on b.rb? I'd prefer not to use shebangs, as I'd like it to be able to run on different computers, some of which don't have /usr/bin/env.

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• Running another ruby script from a ruby script

  - by Andrew Grimm

  In ruby, is it possible to specify to call another ruby script using the same ruby interpreter as the original script is being run by? For example, if a.rb runs b.rb a couple of times, is it possible to replace system("ruby", "b.rb", "foo", "bar") with something like run_ruby("b.rb", "foo", "bar") so that if you used ruby1.9.1 a.rb on the original, ruby1.9.1 would be used on b.rb, but if you just used ruby a.rb on the original, ruby would be used on b.rb? I'd prefer not to use shebangs, as I'd like it to be able to run on different computers, some of which don't have /usr/bin/env. Edit: I didn't mean load or require and the like, but spawning new processes (so I can use multiple CPUs).

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• Ubuntu | Ruby - Can't Remove Ruby 1.9.2 from system

  - by JWally

  I'm new to ubuntu, and might have had a couple of false starts updating ruby / rails. I'm trying to start clean by removing all versions of every thing ruby from my system I think I've installed everything through either Synaptic, or aptitude purge, but I can still do the following: jwally@jwally-laptop:~$ ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux] jwally@jwally-laptop:~$ gem -v 1.3.7 jwally@jwally-laptop:~$ irb irb(main):001:0> RUBY_VERSION => "1.9.2" but when I type "dpkg -l | grep ruby, I only get the following: rc ruby1.8-elisp 1.8.7.249-2 ruby-mode for Emacsen thanks in advance

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• Run command in command prompt from Ruby application

  - by Julian

  I have a command-line Ruby application that uses Curses to create a GUI. This GUI is absolutely mangled by Windows' command prompt if the command prompt window is too small. The command prompt window can be resized in properties. However, I want to resize it programatically. Running this command in the command prompt (nothing to do with Ruby) will resize the command prompt window to desired variables. mode con:cols=120 lines=40 Can I do this purely in Ruby? Or, failing that (I suspect doing it purely in Ruby may be impossible) can my ruby application actually run that command and 'hit enter', and resize window it's running in?

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• Worthwhile to upgrade my Ruby Pickaxe book?

  - by ewindisch

  I have Programming Ruby, The Pragmatic Programmers' Guide, Second Edition which covers Ruby 1.8. It has been several years since I have programmed in Ruby, but I'd like to refresh my memory and bring my knowledge current. With most programming languages, I've found that I can skip books that only concern a single version bump. Yet, Ruby is a young language and I understand there may have been significant changes in 1.9. Although I already have the second edition, is it worthwhile to buy the third edition for Ruby 1.9? Are the differences that vast, or will it be simple enough to catch up to 1.9 with the online docs?

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• How can I convert this PHP script to Ruby? (build tree from tabbed string)

  - by Jon Sunrays

  I found this script below online, and I'm wondering how I can do the same thing with a Ruby on Rails setup. So, first off, I ran this command: rails g model Node node_id:integer title:string Given this set up, how can I make a tree from a tabbed string like the following? <?php // Make sure to have "Academia" be root node with nodeID of 1 $data = " Social sciences Anthropology Biological anthropology Forensic anthropology Gene-culture coevolution Human behavioral ecology Human evolution Medical anthropology Paleoanthropology Population genetics Primatology Anthropological linguistics Synchronic linguistics (or Descriptive linguistics) Diachronic linguistics (or Historical linguistics) Ethnolinguistics Sociolinguistics Cultural anthropology Anthropology of religion Economic anthropology Ethnography Ethnohistory Ethnology Ethnomusicology Folklore Mythology Political anthropology Psychological anthropology Archaeology ...(goes on for a long time) "; //echo "Checkpoint 2\n"; $lines = preg_split("/\n/", $data); $parentids = array(0 => null); $db = new PDO("host", 'username', 'pass'); $sql = 'INSERT INTO `TreeNode` SET ParentID = ?, Title = ?'; $stmt = $db->prepare($sql); foreach ($lines as $line) { if (!preg_match('/^([\s]*)(.*)$/', $line, $m)) { continue; } $spaces = strlen($m[1]); //$level = intval($spaces / 4); //assumes four spaces per indent $level = strlen($m[1]); // if data is tab indented $title = $m[2]; $parentid = ($level > 0 ? $parentids[$level - 1] : 1); //All "roots" are children of "Academia" which has an ID of "1"; $rv = $stmt->execute(array($parentid, $title)); $parentids[$level] = $db->lastInsertId(); echo "inserted $parentid - " . $parentid . " title: " . $title . "\n"; } ?>

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• How to get decent MySQL driver perfomance in Ruby

  - by Zombies

  I notice that I am getting very poor performance for either or both inserts and queries. The queries themselves are basic and can execute with no delay directly from mysql. The ruby script that I wrote is only 1 thread, so only 1 connection is being used, and never closed unless the script is terminated. Pretty basic, I am just trying to insert a lot of rows. There is a look-up or two to get a surrogate key, or to check for duplicates, but the complexity is just O(n). Also, it isn't like there are millions of records, so again the queries themselves take no time to run. I am using: Ruby 1.9.1 Gem/driver:ruby-mysql 2.9.2 MySQL 5.1.37-1ubuntu5.1 ^ all 32 bit versions on a 32bit ubuntu distro I am getting about 1-2 inserts per second, pretty slow. I know a lot of people will suggest to change drivers, but that means I have some refactoring and resting to do. So I would really appreciate any help, but please if you do recomend that at least say why you do (eg: if you have used ruby-mysql x.x.x before and found another mysql driver to be better).ruby-mysql 2.9.2 What I would like to know: How can I improve performance with ruby-mysql 2.9.2 If and only if I cannot do this with ruby-mysql 2.9.2, what should I do?

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• Why’s (Poignant) Guide to Ruby

  - by Ben Griswold

  You’re familiar with O’Reilly’s brilliant Head First Series, right?  Great.  Then you know how every book begins with an explanation of the Head First teaching style and you know the teaching format which Kathy Sierra and Bert Bates developed is based on research in cognitive science, neurobiology and educational psychology and it’s all about making learning visual and conversational and attractive and emotional and it’s highly effective.  Anyway, it’s a great series and you should read every last one of the books. Moving on… I’ve been wanting to learn more about Ruby and Why’s (Poignant) Guide to Ruby has been on my reading list for a while and there was talk about cartoon foxes and other silliness and I figured Why’s (Poignant) Guide to Ruby probably takes the same unorthodox teaching style as the Head First books – and that’s great – so I read the book, in piecemeal, over the last couple of weeks and, well, I figured wrong. Now having read the book, here’s my take on Why’s (Poignant) Guide – it’s very creative and clever and it does a darn good job of introducing one to Ruby.  If you’re interested in Ruby or simply interested, the online book is worth your time.  If you’re thinking (like me) that cartoon foxes will be doing the teaching, that’s simple not the case.  However, the cartoons and the random stories in the sidebar may serve a purpose. Unlike the Head First books where images and captions are used to further explain the teachings, the cartoons and stories in Why’s Guide serve as intermission and offer your brain a brief moment of rest before the next Ruby concept is explained.  It’s not a bad strategy, but definitely not as effective as the Head First techniques.  

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• Should a Python programmer learn Ruby?

  - by C J

  Hi! I have been a Python programmer for around 1.5 years (one internship + side projects), so I am comfortable with the language. Given that everyone is talking about Ruby these days, and I mean seriously! No one bothers about Python (from what I've seen). See GitHub. All RoR. I apply for a job and they ask me about RoR. I look at the screencasts on peepcode.com and they are in Ruby. gitimmersion.com has all the tutorial in Ruby! I know this is pretty vague, but still... why Ruby! Everyone these days is obssessed with RoR! Why not Python? Anyways, my questions are: Should I learn Ruby? Is learning Ruby when knowing Python be, er, complicated for me? Or is it going to be just like learning any other language? Thanks!

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• The speed of Ruby and Java.

  - by Simon

  In every benchmark that I found on the web it seems that Ruby is slow, much slower than Java. The Ruby folks just state that it doesn't matter. Could you give me any example that the speed of Ruby on Rails (and the Ruby itself) really doesn't matter?

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• Conflicting ruby versions

  - by DavidP6

  I am having problems with conflicting versions of Ruby that I have installed. I had 1.8.6 and then installed 1.8.7 and it has caused problems. I get the following error when trying to run my ruby on rails app: /usr/local/lib/ruby/1.8/i686-linux/rbconfig.rb:7: ruby lib version (1.8.6) doesn't match executable version (1.8.7) (RuntimeError) I would like to remove 1.8.7 somehow and just use 1.8.6 but have no idea how to go about doing this.

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• Trouble on setting SSL certificates for Virtual Hosts using Apache\Phusion Passenger in localhost

  - by user502052

  I am using Ruby on Rails 3 and I would like to make to work HTTPS connections on localhost. I am using: Apache v2 + Phusion Passenger Mac OS + Snow Leopard v10.6.6 My Ruby on Rails installation use the Typhoeus gem (it is possible to use the Ruby net\http library but the result doesn't change) to make HTTP requests over HTTPS. I created self-signed ca.key, pjtname.crt and pjtname.key as detailed on the Apple website. Notice: Following instruction from the Apple website, on running the openssl req -new -key server.key -out server.csr command (see the link) at this point Common Name (eg, YOUR name) []: (this is the important one) I entered *pjtname.com so that is valid for all sub_domain of that site. In my Apache httpd.conf I have two virtual hosts configured in this way: # Secure (SSL/TLS) connections #Include /private/etc/apache2/extra/httpd-ssl.conf # # Note: The following must must be present to support # starting without SSL on platforms with no /dev/random equivalent # but a statically compiled-in mod_ssl. # <IfModule ssl_module> SSLRandomSeed startup builtin SSLRandomSeed connect builtin </IfModule> Include /private/etc/apache2/other/*.conf # Passenger configuration LoadModule passenger_module /Users/<my_user_name>/.rvm/gems/ruby-1.9.2-p136/gems/passenger-3.0.2/ext/apache2/mod_passenger.so PassengerRoot /Users/<my_user_name>/.rvm/gems/ruby-1.9.2-p136/gems/passenger-3.0.2 PassengerRuby /Users/<my_user_name>/.rvm/wrappers/ruby-1.9.2-p136/ruby # Go ahead and accept connections for these vhosts # from non-SNI clients SSLStrictSNIVHostCheck off # Ensure that Apache listens on port 443 Listen 443 # Listen for virtual host requests on all IP addresses NameVirtualHost *:80 NameVirtualHost *:443 # # PJTNAME.COM and subdomains SETTING # <VirtualHost *:443> # Because this virtual host is defined first, it will # be used as the default if the hostname is not received # in the SSL handshake, e.g. if the browser doesn't support # SNI. ServerName pjtname.com:443 DocumentRoot "/Users/<my_user_name>/Sites/pjtname.com/pjtname.com/public" ServerAdmin [email protected] ErrorLog "/private/var/log/apache2/error_log" TransferLog "/private/var/log/apache2/access_log" RackEnv development <Directory "/Users/<my_user_name>/Sites/pjtname.com/pjtname.com/public"> Order allow,deny Allow from all </Directory> # SSL Configuration SSLEngine on # Self Signed certificates # Server Certificate SSLCertificateFile /private/etc/apache2/ssl/wildcard.certificate/pjtname.crt # Server Private Key SSLCertificateKeyFile /private/etc/apache2/ssl/wildcard.certificate/pjtname.key # Server Intermediate Bundle SSLCertificateChainFile /private/etc/apache2/ssl/wildcard.certificate/ca.crt </VirtualHost> # HTTP Setting <VirtualHost *:80> ServerName pjtname.com DocumentRoot "/Users/<my_user_name>/Sites/pjtname.com/pjtname.com/public" RackEnv development <Directory "/Users/<my_user_name>/Sites/pjtname.com/pjtname.com/public"> Order allow,deny Allow from all </Directory> </VirtualHost> <VirtualHost *:443> ServerName users.pjtname.com:443 DocumentRoot "/Users/<my_user_name>/Sites/pjtname.com/users.pjtname.com/public" ServerAdmin [email protected] ErrorLog "/private/var/log/apache2/error_log" TransferLog "/private/var/log/apache2/access_log" RackEnv development <Directory "/Users/<my_user_name>/Sites/pjtname.com/users.pjtname.com/public"> Order allow,deny Allow from all </Directory> # SSL Configuration SSLEngine on # Self Signed certificates # Server Certificate SSLCertificateFile /private/etc/apache2/ssl/wildcard.certificate/pjtname.crt # Server Private Key SSLCertificateKeyFile /private/etc/apache2/ssl/wildcard.certificate/pjtname.key # Server Intermediate Bundle SSLCertificateChainFile /private/etc/apache2/ssl/wildcard.certificate/ca.crt </VirtualHost> # HTTP Setting <VirtualHost *:80> ServerName users.pjtname.com DocumentRoot "/Users/<my_user_name>/Sites/pjtname.com/users.pjtname.com/public" RackEnv development <Directory "/Users/<my_user_name>/Sites/pjtname.com/users.pjtname.com/public"> Order allow,deny Allow from all </Directory> </VirtualHost> In the host file I have: ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost # PJTNAME.COM SETTING 127.0.0.1 pjtname.com 127.0.0.1 users.pjtname.com All seems to work properly because I have already set everything (I think correctly): I generated a wildcard certificate for my domains and sub-domains (in this example: *.pjtname.com) I have set base-named virtualhosts in the http.conf file listening on port :433 and :80 My browser accept certificates also if it alerts me that those aren't safe (notice: I must accept certificates for each domain\sub-domain; that is, [only] at the first time I access a domain or sub-domain over HTTPS I must do the same procedure for acceptance) and I can have access to pages using HTTPS After all this work, when I make a request using Typhoeus (I can use also the Ruby Net::Http library and the result doesn't change) from the pjtname.com RoR application: # Typhoeus request Typhoeus::Request.get("https://users.pjtname.com/") I get something like a warning about the certificate: --- &id001 !ruby/object:Typhoeus::Response app_connect_time: 0.0 body: "" code: 0 connect_time: 0.000625 # Here is the warning curl_error_message: Peer certificate cannot be authenticated with known CA certificates curl_return_code: 60 effective_url: https://users.pjtname.com/ headers: "" http_version: mock: false name_lookup_time: 0.000513 pretransfer_time: 0.0 request: !ruby/object:Typhoeus::Request after_complete: auth_method: body: ... All this means that something is wrong. So, what I have to do to avoid the "Peer certificate cannot be authenticated with known CA certificates" warning and make the HTTPS request to work? Where is\are the error\errors (I think in the Apache configuration, but where?!)? P.S.: if you need some more info, let me know.

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• Rails3 and `cd somehwere && do something`

  - by Samer Abukhait

  I have a rails project that has other projects under it, sub-projects have rake and bundler files. When I do ruby -e `cd sub-project && rake`, or ruby -e `cd sub-project && bundle`, commands work as expected and use the sub-project rake/bundler files. However, when I do the same thing from a Rails3 console (rails 3.0.3), rake gives the error no such file to load -- initializer, and bundle operates as if it was fired from the root directory. I tried the same commands from a Rails2.3.10 console and they worked as expected. Is Rails3 doing something wrong here? I am using Ruby 1.9.2 via RVM. $ ruby -v ruby 1.9.2p136 (2010-12-25 revision 30365) [i686-linux]

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• Trying to use a authlogic-connect as a plugin in place of gem - Server doesn't start

  - by Arkid

  I am trying to use Authlogic-connect as a plugin in Rails 3 in place of a gem. I have made an entry in the gemfile as gem "authlogic-connect", :require => "authlogic-connect", :path => "localgems" Now when I run the bundle install, it runs fine. When I try to start the server i get the error Could not find gem 'authlogic-connect (>= 0, runtime)' in source at localgems. Source does not contain any versions of 'authlogic-connect (>= 0, runtime)' Try running `bundle install`. I have placed the unzipped Gem renamed as authlogic-connect in the localgems folder. what is the problem? Here is what I get on using rails plugin install arkidmitra$ rails plugin install git://github.com/viatropos/authlogic-connect.git Usage: rails new APP_PATH [options] Options: [--skip-gemfile] # Don't create a Gemfile -d, [--database=DATABASE] # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db) # Default: sqlite3 -O, [--skip-active-record] # Skip Active Record files [--dev] # Setup the application with Gemfile pointing to your Rails checkout -J, [--skip-prototype] # Skip Prototype files -T, [--skip-test-unit] # Skip Test::Unit files -G, [--skip-git] # Skip Git ignores and keeps -r, [--ruby=PATH] # Path to the Ruby binary of your choice # Default: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -m, [--template=TEMPLATE] # Path to an application template (can be a filesystem path or URL) -b, [--builder=BUILDER] # Path to an application builder (can be a filesystem path or URL) [--edge] # Setup the application with Gemfile pointing to Rails repository Runtime options: -q, [--quiet] # Supress status output -s, [--skip] # Skip files that already exist -f, [--force] # Overwrite files that already exist -p, [--pretend] # Run but do not make any changes Rails options: -h, [--help] # Show this help message and quit -v, [--version] # Show Rails version number and quit Description: The 'rails new' command creates a new Rails application with a default directory structure and configuration at the path you specify. Example: rails new ~/Code/Ruby/weblog This generates a skeletal Rails installation in ~/Code/Ruby/weblog. See the README in the newly created application to get going.

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• Shared Server Dreamhost

  - by Jseb

  I am trying to install an app on a shared server. If i understand properly because i am using a shared server, and that Dreamhost doesn't suppose rails 3.2.8 I must use FCGI, although i am not sure how to install and to make it run properly. From this tutorial http://wiki.dreamhost.com/Rails_3. To my understand here what I did, In dreamhost, activate PHP 5.x.x FastCGI and made sure Phusion Passenger is unchecked Create an app on my localmachine Because rails doesn't create a dispatch and access file i create the two following file in my /public folder dispatch.fcgi #!/home/username/.rvm/rubies/ruby-1.9.3-p327/bin/ruby ENV['RAILS_ENV'] ||= 'production' ENV['HOME'] ||= `echo ~`.strip ENV['GEM_HOME'] = File.expand_path('~/.rvm/gems/ruby 1.9.3-p327') ENV['GEM_PATH'] = File.expand_path('~/.rvm/gems/ruby 1.9.3-p327') + ":" + File.expand_path('~/.rvm/gems/ruby 1.9.3-p327@global') require 'fcgi' require File.join(File.dirname(__FILE__), '../config/environment') class Rack::PathInfoRewriter def initialize(app) @app = app end def call(env) env.delete('SCRIPT_NAME') parts = env['REQUEST_URI'].split('?') env['PATH_INFO'] = parts[0] env['QUERY_STRING'] = parts[1].to_s @app.call(env) end end Then created the file .htaccess <IfModule mod_fastcgi.c> AddHandler fastcgi-script .fcgi </IfModule> <IfModule mod_fcgid.c> AddHandler fcgid-script .fcgi </IfModule> Options +FollowSymLinks +ExecCGI RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ dispatch.fcgi/$1 [QSA,L] ErrorDocument 500 "Rails application failed to start properly" Uploaded to a folder and pointed to the public folder in dreamhost Made sure dispatch.fcgi has 777 for write ssh and run the following command in the public folder : ./dispatch.fcgi Crossing my finger but it doesn't work I get the following errors ./dispatch.fcgi: line 1: ENV[RAILS_ENV]: command not found ./dispatch.fcgi: line 1: =: command not found ./dispatch.fcgi: line 2: ENV[HOME]: command not found ./dispatch.fcgi: line 2: =: command not found ./dispatch.fcgi: line 3: syntax error near unexpected token (' ./dispatch.fcgi: line 3:ENV['GEM_HOME'] = File.expand_path('~/.rvm/gems/ruby 1.9.3-p327')' Doing wrong??? Oh and if i go on the server i get this Rails application failed to start properly

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• Why does 6.times.map work in ruby 1.8.7 but not 1.8.6

  - by Lee

  The following code snippet works fine in 1.8.7 on Mac OS X, but not in 1.8.6 on Ubuntu. Why? Is there a workaround? Works in 1.8.7: $ ruby --version ruby 1.8.7 (2009-06-08 patchlevel 173) [universal-darwin10.0] ltredgate15:eegl leem$ irb >> 6.times.map {'foo'} => ["foo", "foo", "foo", "foo", "foo", "foo"] >> But not in 1.8.6: # ruby --version ruby 1.8.6 (2008-08-11 patchlevel 287) [i686-linux] Ruby Enterprise Edition 20090610 # irb irb(main):001:0> 6.times.map {'foo'} LocalJumpError: no block given from (irb):1:in `times' from (irb):1 irb(main):002:0> Why is there a difference? What's the workaround for 1.8.6?

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• How to convert a gem to plugin in ruby on rails and vice versa?

  - by cdb

  Is there any tool to convert plugin to gem and vice versa.

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• What is the best way to set a database entry so that it expires after n hours using Ruby/Rails?

  - by marcgg

  My app has a token model as such: class Token < ActiveRecord::Base # The model include a few attributes including created_at end I want entries linked to this model to expire after 6 hours, meaning that they should get automatically deleted. I know that I could set a cronjob or something similar to do this, but isn't there a better/simpler way? Note: I'm using Rails 3.0.0beta3, mysql (in dev) and postgres (in prod)

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• First Ruby on Rails App: use v3 (Beta) or 2.3?

  - by Marco

  Now that Rails 3.0 beta has been released, should I spend time building my first Rails application on 2.3 or does it make more sense to use the beta?

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• Why doesn't this Ruby on Rails code work as I intend it to?

  - by Justin Meltzer

  So I attempted to build what I asked about in this question: Fix voting mechanism However, this solution doesn't work. A user can still vote however many times he or she wants. How could I fix this and/or refactor? def create @video = Video.find(params[:video_id]) @vote = @video.video_votes.new @vote.user = current_user if params[:type] == "up" @vote.value = 1 else @vote.value = -1 end if @previous_vote.nil? if @vote.save respond_to do |format| format.html { redirect_to @video } format.js end else respond_to do |format| format.html { redirect_to @video } format.js {render 'fail_create.js.erb'} end end elsif @previous_vote.value == params[:type] @previous_vote.destroy else @previous_vote.destroy if @vote.save respond_to do |format| format.html { redirect_to @video } format.js end else respond_to do |format| format.html { redirect_to @video } format.js {render 'fail_create.js.erb'} end end end @previous_vote = VideoVote.where(:video_id => params[:video_id], :user_id => current_user.id).first end

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• mysql error using Rails-- Please help

  - by Cypher

  Alright I am sry for the noob question but this has been driving me up a wall-especially because I got it to work yesterday and I can't remember what I did.... I am just trying to use mysql with rails with a mongrel server. I set up the server fine and can run rails applications that don't need mysql but when I create a project using (for example) rails -d mysql blog and then create some simple controller e.g. ruby script/generate Test then put this code in the controller... class TestController < ApplicationController def index render :text => 'WORK' end end then when I start the server up and open up localhost:3000/test I get the following error: = Booting Mongrel = Rails 2.3.5 application starting on http://0.0.0.0:3000 = Call with -d to detach = Ctrl-C to shutdown server /!\ FAILSAFE /!\ Mon May 10 20:15:06 -0500 2010 Status: 500 Internal Server Error Can't connect to MySQL server on 'localhost' (10061) C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/mysql_adapter.rb:589:in 'real_connect' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/mysql_adapter.rb:589:in 'connect' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/mysql_adapter.rb:203:in 'initialize' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/mysql_adapter.rb:75:in 'new' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/mysql_adapter.rb:75:in 'mysql_connection' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:223:in 'send' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:223:in 'new_connection' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:245:in 'checkout_new_connection' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:188:in 'checkout' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:184:in 'loop' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:184:in 'checkout' C:/Ruby/lib/ruby/1.8/monitor.rb:242:in 'synchronize' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:183:in 'checkout' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:98:in 'connection' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_pool.rb:326:in 'retrieve_connection' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_specification.rb:123:in 'retrieve_connection' C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapter s/abstract/connection_specification.rb:115:in 'connection' etc... In the browser i get a 'We're sorry, but something went wrong' Does anyone know what I am doing wrong?

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• Cannot use ruby-debug19 with 1.9.3-p0?

  - by Stefan Kendall

  I run this: gem install ruby-debug19 And in my cucumber env.rb file, I have this: require 'ruby-debug' When I try to run, though, I get this exception: /home/skendall/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.so: undefined symbol: ruby_current_thread - /home/skendall/.rvm/gems/ruby-1.9.3-p0/gems/ruby-debug-base19-0.11.25/lib/ruby_debug.so (LoadError) What do I need to do to get ruby-debug to work with 1.9.3-p0?

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• Missing a constant on load.. how can i get around this? (Rails::Plugin::OpenID)

  - by Chris Kimpton

  I have a Rails 2 project that I am trying to upgrade to Rails 3, but getting some issues with bundler. When I run "rake", it runs the tests just fine. But when I run "bundle exec rake" it fails to find a constant. The error is this: /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/dependencies.rb:131:in `const_missing': uninitialized constant Rails::Plugin::OpenID (NameError) from /Users/kimptoc/Documents/ruby/borisbikes/borisbikestats.pre3/vendor/plugins/open_id_authentication/init.rb:16:in `evaluate_init_rb' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:182:in `call' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:182:in `evaluate_method' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:166:in `call' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:90:in `run' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:90:in `each' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:90:in `send' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:90:in `run' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/activesupport-2.3.9/lib/active_support/callbacks.rb:276:in `run_callbacks' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/actionpack-2.3.9/lib/action_controller/dispatcher.rb:51:in `send' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/actionpack-2.3.9/lib/action_controller/dispatcher.rb:51:in `run_prepare_callbacks' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/rails-2.3.9/lib/initializer.rb:631:in `prepare_dispatcher' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/rails-2.3.9/lib/initializer.rb:185:in `process' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/rails-2.3.9/lib/initializer.rb:113:in `send' from /Users/kimptoc/.rvm/gems/ruby-1.8.7-p330@p-borisbikestats-pre-rails3/gems/rails-2.3.9/lib/initializer.rb:113:in `run' from /Users/kimptoc/Documents/ruby/borisbikes/borisbikestats.pre3/config/environment.rb:9 from ./test/test_helper.rb:2:in `require' from ./test/test_helper.rb:2 I have these gems installed: $ gem list *** LOCAL GEMS *** actionmailer (2.3.9) actionpack (2.3.9) activerecord (2.3.9) activeresource (2.3.9) activesupport (2.3.9) authlogic (2.1.3) bundler (1.0.7) gravtastic (2.2.0) linecache (0.43) mocha (0.9.10) newrelic_rpm (2.13.4) parseexcel (0.5.2) rack (1.1.0) rack-openid (1.1.1) rails (2.3.9) rake (0.8.7) ruby-debug-base (0.10.5.jb2, 0.10.4) ruby-debug-ide (0.4.15) ruby-openid (2.1.8, 2.1.7, 2.0.4) sqlite3-ruby (1.3.2) The bundler Gemfile is as follows: source 'http://rubygems.org' #gem 'rails', '3.0.3' gem "rails", "2.3.9" gem "activesupport", "2.3.9" gem "ruby-openid", "2.1.7", :require => "openid" #gem "authlogic-oid", "1.0.4" # Bundle edge Rails instead: # gem 'rails', :git => 'git://github.com/rails/rails.git' gem 'sqlite3-ruby', :require => 'sqlite3' gem "authlogic", "= 2.1.3" gem "newrelic_rpm" # gem "facebooker" gem "parseexcel" gem 'gravtastic', '= 2.2.0' gem "rack-openid", '=1.1.1', :require => 'rack/openid' # not sure what this does... gem "mocha" I have these plugins installed: 2dc_jqgrid authlogic_openid open_id_authentication squirrel I see these similar questions: Missing a constant on load.. how can i get around this? and Requiring gem in Rails 3 Controller failing with "Constant Missing" But their solutions dont seem to work for my situation. I am guessing the issue is around the plugins, but my ruby-foo is too weak. Thanks in advance, Chris

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• Which version of rails should I install with ruby 2.0.0 installed?

  - by Ekin Hazal

  Hi I am building a ROR development environment on a new computer with windows 7, now I have Ruby version 2.0.0 and Gems version 2.2.2 installed. Which version of Rails should I install? I saw this on rubyonrails.org/download : "We recommend Ruby 2.1.0 for use with Rails. We stopped supporting Ruby 1.8.x after Rails 3.2. Ruby 1.9.2+ will be supported until Rails 5." I will be working on a long-time project, I'm just trying to lessen the headaches I will have later. Right now, the latest Rails -v is 4.1.0 and they recommend Ruby 2.1.0 for use with Rails. I think the best option is to go with this set. Any other thoughts?

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