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• Is devise compatible with declarative_authorization?

  - by sharas

  Just asking whenever devise authentication mechanism for Rails does not conflict with declarative_authorization. Maybe someone tried this combo and can share their knowledge, so I and other coders do not waste time trying to tie these ones up.

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• Correct display of a string...

  - by Jamal Abdul Nasir

  How to display a string in correct format as i enter it in the textarea in ruby on rails? actually i enter some string in the textarea as: my name is jamal. now there is a next line starting after name... but i get the following in the view... my name is jamal which i don't want to be like that... so, how to get the correct format..? i hope u understand...

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• How do I... truncate string in an array

  - by ander163

  In a ruby on rails app, I build an array of Project Names and project id values, but want to truncate the length of the names. Current code is: names = active_projects.collect {|proj| [proj.name, proj.id]} I have tried to add a truncate function to the block, but am getting undefined method for class error. Thanks in advance - I just cannot wrap my head around this yet.

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• how to write query string for webrick?

  - by kshama

  Hi, My rails application requires few values to be specified in the text box. My web page contains few text boxes .How can i specify the values of these text boxes in the url as query string while using webrick?can any one help, am new to this. Thanks in advance.

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• How do I include a module in a namespaced class?

  - by snl

  I am having trouble including a module in a namespaced class. The example below throws the error uninitialized constant Bar::Foo::Baz (NameError). What basic piece of Ruby knowledge am I missing here? module Foo module Baz def hello puts 'hello' end end end module Bar class Foo include Foo::Baz end end foo = Bar::Foo.new

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• Is it possible to run locally JRuby on Google App Engine without restarting server on every change?

  - by elado

  Unfortunately, GAE requires restart of the server on each code change. Is it possible to prevent it and have immediate feedback after code save? Or, can I import Google App Engine's API into my ruby code and run it on Sinatra server? Tried this but it fails on "import com.google.appengine.api" (it doesn't know what 'com' is). For Sinatra, I use "Rerun" ( http://github.com/alexch/rerun ) which restarts server immediately after a change with minimum wait. Thanks.

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• Error message when running a Sinatra application on Windows Vista.

  - by Adam Siddhi

  I was following a video tutorial by Adam Keys about how to make a URL shortener app in Sinatra. The code that is giving me problems is located here http://pastie.org/958644 So when I ran it I got this error: shortener.rb:12: syntax error, unexpected $undefined, expecting $end @@ home I typed it exactly as Adam said but this keeps happening. What could the issue be? By the way, I am running ruby 1.9.1p243 (2009-07-16 revision 24175) [i386-mingw32] on Windows Vista. Thanks, Adam

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• Accessing wireless network through terminal in ubuntu

  - by suad.al.darra

  I'm connected to a wireless network and it's working fine on browser but not on terminal. I'm getting a timeout error when i'm trying to download any plugin for ruby

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• upload analogue with XSendFile?

  - by hell.orts.ru

  Is there some way to use something similar to x-sendfile for uploading files, e.g. saving particular stream/parameter from request to file, without putting it wholly into memory? (In particular, with apache2 and ruby fcgi)

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• Scaffolding Extensions: NoMethodError

  - by marienbad

  Not sure if many people are familiar with Scaffolding Extensions for Ruby, but I've looked through their docs, forums, and even the source code of the Heroku test site, and not found an answer. I made a basic Sinatra app and followed right from the RDoc's instructions: require 'scaffolding_extensions' require 'sinatra/base' class Thingy < Sinatra::Base scaffold_all_models end gives undefined method 'scaffold_all_models' for Thingy:Class (NoMethodError) and I know Scaffolding Extensions is loadable because I can successfully set some config variables in its classes.

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• Get underlined text with markdown

  - by Peter

  Greetings, I am using BlueCloth as a Markdown library for Ruby and I can't find any syntax for getting a text underlined. Any ideas? Peter

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• Help me decipher this output

  - by Bragaadeesh

  Hi, I have started learning Ruby recently and I was trying out the following piece of code. a=[1,2] b='slam dunk' a.each { |b| c=a*b; puts c;} I am getting the following output. I have no clue why. I expected an error or something to be thrown. Can someone explain me why this happens? 1 2 1 2 1 2 Thanks

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• How do I aggregate activerecord model data for a specific time period?

  - by gsiener

  I'm collecting data from a system every ~10s (this time difference varies due to communication time with networked devices). I'd like to calculate averages and sums of the stored values for this activerecord model on a daily basis. All records are stored in UTC. What's the correct way to sum and average values for, e.g., the previous day from midnight to midnight EST? I can do this in sql but don't know the "rails way" to make this calculation.

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• Looking for a recommendation of a good tutorial on best practices for a web scraping project?

  - by in bruges

  I need to do a fairly extensive project involving web scraping and am considering using Hpricot or Beautiful Soup (i.e. Ruby or Python). Has anyone come across a tutorial that they thought was particularly good on this subject that would help me start the project off on the right foot?

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• Stack overflow error in IE 7 and 8

  - by cdb

  I have a rails application in which i am using scriptaculous,prototip,controlMModal(livepipe.net). I am getting an error in IE 7 and 8 as web page error (alert box) The error is "Stack overflow at line 1715" Versions used: scriptaculous v 1.8.3 prototip 2.2.0.2 prototype 1.6.1 controlmodal 2.2.3 (livepipe.net)

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• How to convert a table column to another data type

  - by holden

  I have a column with the type of Varchar in my Postgres database which I meant to be integers... and now I want to change them, unfortunately this doesn't seem to work using my rails migration. change_column :table1, :columnB, :integer So I tried doing this: execute 'ALTER TABLE "table1" ALTER COLUMN "columnB" TYPE integer USING CAST(columnB AS INTEGER)' but cast doesn't work in this instance because some of the column are null... any ideas?

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• Mechanize complex form input name

  - by ADAM

  Hi there i am trying to access a form in mechanize with ugly characters in the object name similar to this agent = Mechanize.new page = agent.get('http://domain.com) form = page.forms[0] form.ct600$Main$LastNameTextBox = "whatever" page = agent.submit(form) The problem is the $ in the html name is messing with ruby because Is there another method i could use ie: form.element_by_name("ct600$Main$LastNameTextBox") = "whatever" Unfortunately i cant change the html

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• amazon simpledb with aws-sdb-proxy suitable for high traffic production app?

  - by z3cko

  i am using amazon simpledb with the aws_sdb gem and aws-sdb proxy as outlined in a documentation from amazon with ruby on rails and a local aws proxy that runs on webrick (providing a bridge with ActiveResource). see http://developer.amazonwebservices.com/connect/entry.jspa?externalID=1242 i am wondering if the aws-sdb-proxy (webrick!) is suitable for high traffic load, since webrick is supposed to be a development server. anyone has comments or experiences?

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• I really dont understand nothing about GIT!!! making me crazy too

  - by Totty

  I need to install a plugin like this: script/plugin install git://github.com/apotonick/cells.git but it doesnt work... it just creates a new empty folder in the plugin dir, "cells" i use eclipse and rails

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• where from does paperclip get the name of original file?

  - by Pavel K.

  i started using nginx upload module (which creates upload files like /tmp/000121545) but i need paperclip to use original filename while saving files (like /public/avatars/LuckyLuke.jpg) previously in the parameters Rails were passing just "avatar"=>#<File:/tmp/RackMultipart20100413-6151-t3ecq0-0> no original filename as well, so i am wondering where from does it come in paperclip? i tried looking through plugin code but it's currently a bit too complex for me.

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• Closest Java equivalent of ActiveMerchant that would work on Google App Engine?

  - by Chuck

  I want to build ecommerce functionality on Google App Engine for Java. What Java payment gateway library works closest to ActiveMerchant (from Ruby on Rails) and also works on GAE?

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• Removing text within parentheses (parentheses within parentheses prob)

  - by TenJack

  Hi, I am trying to remove text that is within parentheses (along with the parentheses themselves) but am having trouble with the scenario where there are parentheses within parentheses. This is the method I am using (in Ruby): sentence.gsub(/\(.*?\)/, "") and that works fine until I have a sentence such as: "This is (a test (string))" Then the above chokes. Anyone have any idea how to do this? I am completely stumped.

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• how .hash string method work ?

  - by mgpyone

  I'm just a newbie to ruby. I've seen a string method (String).hash . For example, in irb, I've tried >> "mgpyone".hash returns => 144611910 how does this method works ?

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• how to make a web-gallery with RoR?

  - by neuro

  hello, Im a newbie RoR kid, and I'm trying to make a web gallery app just like the onyx http://www.hulihanapplications.com/projects/onyx since it's outdated and i couldn't get it to work with my 2.3.8 rails' version. So, are plugins like paperclip or carrierwave any good for me to start with. Or should i take another route and writh the app from scratch. please provide me with good links regarding the subject. thank you in advance

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• can I use expect on windows without installing cygwin?

  - by Geo

  expect is a module used for spawning child applications and controlling them. I'm interested in python/ruby.

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