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• No colors when using autospec

  - by kfitzpatrick

  When I'm using autospec to test a non-Rails Ruby project, I always have trouble getting my tests to show up red or green. When I run a regular 'spec spec/ --color' command I get normal red/green responses. I've tried putting all sorts of commands in the .autotest file and I can't get that to work. Also, in my Rails projects, I don't get this problem. Note: I do have the ZenTest(4.2.1) and redgreen (1.2.2) gems installed. I'm currently trying to get it working with this project: http://github.com/coreyhaines/kata-number-to-led

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• Liquid templates - accessing members by name

  - by egarcia

  I'm using Jekyll to create a new blog. It uses Liquid underneath. Jekyll defines certain "variables": site, content, page, post and paginator. These "variables" have several "members". For instance, post.date will return the date of a post, while post.url will return its url. My question is: can I access a variable's member using another variable as the member name? See the following example: {% if my_condition %} {% assign name = 'date' %} {% else %} {% assign name = 'url' %} {% endif %} I have a variable called name which is either 'date' or 'url'. How can I make the liquid equivalent of post[name] in ruby? The only way I've found is using a for loop to iterate over all the pairs (key-value) of post. Beware! It is quite horrible: {% for property in post %} {% if property[0] == name %} {{ property[1] }} {% endif %} {% endfor %} Argh! I hope there is a better way. Thanks.

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• Can't get access to PHPmyAdmin after setting a root password and using Instant Rails

  - by Derek

  Wanted to get started with Ruby on Rails so I installed instant rails and set up a mysql password. Problem is now I can't get access to phpmyadmin. From the rails control panel, when I go to configure database (via PhpMyadmin) it opens up phpmyadmin with the message Error MySQL said: Documentation #1045 - Access denied for user 'root'@'localhost' (using password: NO) When I used to use XAMPP after setting a password instead of taking me directly within phpmyadmin (as it did without a password) it took me to the login screen instead. With instant rails that's not the case. Anyone had this problem when they first set a mysql password and using the instant rails package?

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• Broken pipe error in rails with memcached

  - by abronte

  I keep running into this error MemCacheError (Broken pipe): Broken pipe on my Rails app and I can't figure out why. When I access memcached via Rails.cache in my controller, the first 1 or 2 read/writes always seems to throw the broken pipe error. But when I access memcached by creating a new object, ActiveSupport::Cache::MemCacheStore.new, I don't seem to get this error. I also access memcached in another ruby process, and the first read always has this error regardless of the way I access memcached. I did implement a work around just by retrying the read but id rather have a better long term solution. Currently the only time I see this problem is after I restart memcached. I'm using Rails 2.3.5 and memcached 1.4.4 (I've also tried this with memcached 1.2.2).

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• Include FileUtils raises an error

  - by Bilal Aslam

  I am trying to install CruiseControl.rb on an Amazon EC2 instance. I get this error in the mongrel log: /data/cruisecontrol/releases/20100313003145/vendor/rails/activesupport/lib/active_support/dependencies.rb:105:in `const_missing': uninitialized constant ProjectsMigration::FileUtils (NameError) This error is raised in a file called projects_migration.rb: http://gist.github.com/331025. Check out line 3, which I have commented out. If you remove the comment-out, you will get this error as well. The weird part: from ruby script/console I can include FileUtils just fine!

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• Wrapper around bash, control STDIN and STDOUT

  - by blinry

  I would like to talk to a interactive bash process. Here is an example, so you know what I want to archieve: Program starts a new bash process. User types "ls" into my program. Program sends this command to the bash process. Program reads all available output of the bash (including the prompt) and displays it back to the user. GOTO 1 As you can guess, there is much room for nifty manipulations here and there... ;-) It would be wonderful if this also worked for subprocesses (started by the bash process) and curses-based programs. I would like to implement this functionality in Ruby, and already have experimented with IO.popen, but strange things happen. You are also welcome to do this in other languages.

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• Rub, regex, sentences

  - by Perello

  I'm currently building a code generator, which aim to generate boiler plate for me once i wrote the templates and/or translations, whatever the language i have to work with, and it has an educationnal part :p. So i have a problem with a regex in ruby. The regex aim to select whatever is between {{{ and }}}, so i can generae functions according to my needs. My regex is currently : /\{\{\{(([a-zA-Z]|\s)+)\}\}\}/m My test data set {{{Demande aaa}}} = {{{tagadatsouintsouin tutu}}} The results are : [["Demande aaa", "a"], ["tagadatsouintsouin tutu", "u"]] So the regex pick each time the last character twice. But, that's not exactly what i want, my need is more about this : /\{\{\{((\w|\W)+)\}\}\}/m But this as a flaw too, the results : [["Demande aaa}}} = {{{tagadatsouintsouin tutu", "u"]] Whereas, i wish to get [["Demande aaa"],["tagadatsouintsouin tutu"]] Any ideas to correct theses regex ? I could use 2 sets of delimiters, but it won't learn me anything.

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• Technology stack for very frequent gps data collection

  - by gvaswani

  I am working on a project that involves gps data collection from many users (say 1000) every second (while they move). I am planning on using a dedicated database instance on EC2 with the mysql persistent block storage and run a ruby on rails application with nginx frontend. I haven't worked on such data collection application before. Am I missing something here? I will have a another instance which will act as application server and use the data from the same EBS. If anybody has dealt with such a system before, Any advise would be much appreciated?

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• oauth process for twitter. the difference between client and web application

  - by Radek

  I managed to make the oauth process work for PIN kind of verification. My twitter application is client type. When enter authorize url into web browser and grant the application access then I have to enter pin in my ruby application. Can I finish the process of getting access token without the pin thing? My current code is like. What changes do I need to do to make it work without pin? gem 'oauth' require 'oauth/consumer' consumer_key = 'w855B2MEJWQr0SoNDrnBKA' consumer_secret ='yLK3Nk1xCWX30p07Id1ahxlXULOkucq5Rve28pNVwE' consumer=OAuth::Consumer.new consumer_key, consumer_secret, {:site=>"http://twitter.com"} request_token = consumer.get_request_token puts request_token.authorize_url puts "Hit enter when you have completed authorization." pin = STDIN.readline.chomp access_token = request_token.get_access_token(:oauth_verifier => pin) puts puts access_token.token puts access_token.secret

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• how to category/subcategory/city/firm-name url?

  - by kkalgidim

  iam using ruby on rails i have models -category -subcategory -city -firm when i click on category it will show sub categories and permalink should be: xxx.com/category when i click subcategory it will show firms and city names. xxx.xom/category/subcategory when i clikc on city name it will filter firms belongs to that city xxx.com/category/subcategory/city when i clikc on firm name it will show xxx.com/category/subcategory/city/firm-name firms may have more than one sub category i used premalink_fu but i could not do that sub category system. category,subcategory,city,firm tables have their own permalink field on db. but i dont know how to combine them dynamically. i can do xxx.com/category but icant do xxx.com/category/subcategory how can i do that please help me

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• Shell Script Sequencing with Rake

  - by Haseeb Khan

  Hi All, I am working on a rake utility and want to implement something mentioned below: There are some shell commands in a sequence in my Rake file. What I want is that the sequence should wait for the previous command to finish processing before it moves to the next one. sh "git commit -m \"#{args.commit_message}\"" do |ok, res| # Do some processing end sh "git push heroku master" So, in the above example what I want is that sh "git push heroku master" shouldn't be executed until the processing in the sh "git commit -m \"#{args.commit_message}\"" do |ok, res| # Do some processing end is completed. Also another nice to have would be that if I can store the output of the shell command in a Ruby variable so it can be used in further manipulation if required. Looking forward to a reply from the fellow community member shortly. Thanks in advance.

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• Running tasks in the background with lower CPU priority

  - by Brendon Muir

  I have a feature in my CMS that allows a user to upload a zip file full of images and the server will extract them and insert each one into an image gallery. I've noticed that this grinds up the CPU quite severely and causes other requests to slow down. I'm thinking of using the delayed_job plugin to delegate each image addition into the background, but I also want to give that process a lower CPU priority so that it doesn't bog down the server. I'm pretty confident in the delaying part of the exercise, but the throttling part is where I'm stuck. Is there a ruby way of lowering the priority of a method call? It's the image resizing that causes the CPU chew. Any ideas welcome :)

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• sti and polymorphic's

  - by Alexey Poimtsev

  Hi, I have problem with my code class Post < ActiveRecord::Base end class NewsArticle < Post has_many :comments, :as => :commentable, :dependent => :destroy, :order => 'created_at' end class Comment < ActiveRecord::Base belongs_to :commentable, :polymorphic => true, :counter_cache => true end And on attempt go get comments for some NewsArticle i see in logs something like Comment Load (0.9ms) SELECT "comments".* FROM "comments" WHERE ("comments"."commentable_id" = 1 and "comments"."commentable_type" = 'Post') ORDER BY created_at Strange that "commentable_type" = 'Post'. Whats wrong? PS: Rails 2.3.5 && ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-darwin10]

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• Image selector/picker

  - by MrThomas

  Using Ruby on Rails what steps can I take to create a image picker. This is a image object which I can use all over my app: Using paperclip and a polymathic association making images available to all other models. I wish to list the images in each model and chose which of them is associated to a individual new or old record. for example: I could use the image as a sidebar image or a banner or advert image etc. I would be great full for any help. Thanks Dan

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• STI and polymorphs

  - by Alexey Poimtsev

  Hi, I have problem with my code class Post < ActiveRecord::Base end class NewsArticle < Post has_many :comments, :as => :commentable, :dependent => :destroy, :order => 'created_at' end class Comment < ActiveRecord::Base belongs_to :commentable, :polymorphic => true, :counter_cache => true end And on attempt go get comments for some NewsArticle i see in logs something like Comment Load (0.9ms) SELECT "comments".* FROM "comments" WHERE ("comments"."commentable_id" = 1 and "comments"."commentable_type" = 'Post') ORDER BY created_at Strange that "commentable_type" = 'Post'. What's wrong? PS: Rails 2.3.5 && ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-darwin10]

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• Rails 3 - Nested layouts - LocalJumpError

  - by Art Shayderov

  Hi Nested layouts do not work in Rails 3. After I hit this I tried Rails Guides Example on a blank project (both ruby 1.9.1 and 1.8.7). LocalJumpError no block given on line <%= yield :stylesheets %. If you remove this line you will get the same error on the next yield statement. Could someone fix(patch) this? It's probably just a matter of calling block_given? in the right place. That would be great. Thanks Added on 4/3: Rails 3 beta 2 released. Problem fixed.

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• the rmagick manual is quite vague. can you help me by changing a pictures filetype and size?

  - by Joern Akkermann

  Hi, it's about RMagick with Ruby On Rails. I do the following: image = params[:image] # params[:image] is the image from the file-form. name = image.original_filename.scan(/[^\/\\]+/).last name = dir + t.day.to_s + t.month.to_s + t.year.to_s + t.hour.to_s + t.min.to_s + t.sec.to_s + name f = File.new(name, "wb") f.write image f.close image = Magick::Image.read(name) image = image.resize_to_fit(200, 250) f = File.new(name, "wb") f.write image.to_blob f.close Do I really need to first save and then change it? And how about changing not only the size, changing also the Filetype? I want a JPG with 60% quality. Please help me. Yours, Joern.

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• Preventing Rails from opening production.log, when it is deployed with jruby-rack into tomcat.

  - by gregor

  I have to to deploy a Ruby on Rails application to an tomcat application server using jruby-rack. Due to security reasons my customer has the webapps directory mounted read only and he won't changed this. The problem that arises is, that the rails logger wants to open the WEB-INF/log/production.log in write mode. He writes nothing to this file because log4j and friends are configured and working, but rails complains that the file is not readable. Are there any suggestions from preventing rails from opening this file?

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• Database on the fly with scripting languages

  - by afilatun

  I have a set of .csv files that I want to process. It would be far easier to process it with SQL queries. I wonder if there is some way to load a .csv file and use SQL language to look into it with a scripting language like python or ruby. Loading it with something similar to ActiveRecord would be awesome. The problem is that I don't want to have to run a database somewhere prior to running my script. I souldn't have additionnal installations needed outside of the scripting language and some modules. My question is which language and what modules should I use for this task. I looked around and can't find anything that suits my need. Is it even possible?

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• Problem installing RVM...

  - by Cody

  I have executed the commands as prescribed in the instructions at the rvm website but things don't seem to work.. Fetching the code from the git repository runs smoothly but when I try to use rvm notes Error: /usr/local/bin/rvm: line 73: /home/cody/.rvm/scripts/rvm: No such file or directory flashes in multiple lines and doesn't stop till I hit ctrl+C.. I am running Ubuntu 8.04 and currently I am running ruby 1.9.2.. Sorry, if I am missing out any necessary information. Thanks in advance.

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• How to encrypt the mobile configuration profiles in iOS (in OTA deployments)?

  - by user1353477

  I am trying to sign and encrypt .mobileconfig profiles for iOS devices. Signing works perfectly using openssl::pkcs7 sign function in ruby, however using encrypt function, I get an encrypted data but Safari fails to install the profile saying "Invalid Profile". There are two questions in this regard: Which data from the .mobileconfig profile is actually encrypted that goes into the .. section of the EncryptedPayloadContent ? Is the data in binary format (.der) or base64 encoded? Any help in this regard would be helpful as APPLE severly lacks any documentation in encrypting the profiles.

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• Storing Temporary Items Without User Having to Register

  - by Dex

  I have a ruby on rails app where I want users to be able to store a list. The list is similar to a shopping cart except for the fact that they input their own items. I would like store everything in the session, but this seems like it would get complicated and would start to take up space after a while. The other way of doing it was to create temporary entries in the database with a "temp" flag and session id so that they could come back to it. The only problem with this is, how do I clean out stale entries?

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• Rails Beta3 & PaperClip & Passenger Bundler::PathError

  - by firecall

  So I'm going around in circles with this - I'm using a fork of the Paperclip Rails gem to get it to work with Rails3. Works fine on my OSX box with Passenger. But on my server (CentOS 5) I get this this error: git://github.com/lmumar/paperclip.git (at rails3) is not checked out. Please runbundle install(Bundler::PathError)Blockquote I tried Bundle Pack, but that doesnt pack gems from github. I read a post about setting the parh to the BUNDLE_HOME in my application.rb file which I tried: ENV['BUNDLER_HOME']="~/.bundle/ruby/1.8/bundler/gems/" But that doesnt work. Any ideas anyone? I dont know what else to do and have no idea how to debug or trace the problem further :( Passenger version 2.2.11. thanks.

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• Best language to learn complementing java

  - by danielrutledge

  Hi all, I'm a somewhat experienced java ee developer, and I wish to complement my background by learning a newish language. I'm recently out of school where I did a ton of scientific computing and some functional programming, so I'm pretty comfortable with those families of languages. If at all possible, I'd like to pick a language with some market value, though I know this is tough to gauge. After snooping around a bit, the consensus seems to be one of Python/Ruby/Perl; how would each of these work with java in a web application environment, and in your opinion which complements it best? Any other suggestions for languages would also be welcome.

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• How would you make a blog with a TDD approach?

  - by Earlz

  I'm considering remaking my blog(currently in PHP, but <100 lines of non-layout code) in Ruby on Rails just for the fun of it. I want to make another project in Rails, but I should learn Rails(more than hello world) before I go to try to create a full project. Another thing I want to do while remaking my blog is to at least figure out what TDD is all about. So how would you go about taking a Test Driven approach to the creation of a blog? What tests would you write? How would you begin? Everytime I visualize writing a blog it'd end up needing a million tests for a single component to fully test it. How do I avoid writing too many tests? Also, I am making this community wiki because I intend for this to basically be made into a mini tutorial/knowledge base...

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