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• Custom Content-Type for File in Rails 'public' Folder

  - by Kevin Sylvestre

  For assets stored in the 'public' folder of a ruby-on-rails application is it possible to change the 'Content-Type' when running 'script/server'? For example, I am attempting to create an HTML5 application supporting offline mode, and have an 'offline.manifest'. When I run: curl -I localhost:3000/offline.mainfest The following header information is returned: HTTP/1.1 200 OK ... Content-Type: text/plain ... However, HTML5 specifications require: HTTP/1.1 200 OK ... Content-Type: text/cache-manifest ...

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• Calls block once for each element of an array, passing that element as a parameter

  - by Puru puru rin..

  Hello, I have some difficulties for using Ruby block, passing in a method. As in the following case, I would like to display each element of @array, from Box instance (using .each method): class Box def initialize @array = [:foo, :bar] end def each(&block) # well, hm.. end end a = Box.new a.each { |element| puts element } Thanks for any help.

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• Paperclip not running tasks but not showing errors

  - by Trip

  This is strange. I just did a deploy to a cluster server, and since then, pictures have not been processing. Reading the logs, I usually do not get an error at all, but they never finish. However, on one particular image, I found this little bit at least, but this might not explain everything.. Any ideas? Processing PhotosController#edit (for 69.248.152.173 at 2010-05-27 04:25:12) [GET] Parameters: {"gallery_id"="2102", "action"="edit", "type"="photo", "id"="15453", "crop"="true", "controller"="photos", "organization_id"="470", "_"="1274959512393"} Rendering media/crop_photo ActionView::TemplateError (/data/HQ_Channel/releases/20100524111501/public/system/photos/15453/original/DSC05193.JPG is not recognized by the 'identify' command.) on line #4 of app/views/media/crop_photo.js.haml: 1: == $("#media_header").html('#{ escape_javascript(render :partial = 'media/crop_photo') }').slideDown("slow"); 2: 3: :plain 4: function updateForm(coords) 5: { 6: var rx = #{PHOTO_IMAGE_WIDTH} / coords.w; 7: var ry = #{PHOTO_IMAGE_HEIGHT} / coords.h; vendor/gems/thoughtbot-paperclip-2.3.1/lib/paperclip/geometry.rb:24:in `from_file' app/models/photo.rb:68:in `photo_geometry' app/views/media/crop_photo.js.haml:4:in `_run_haml_app47views47media47crop_photo46js46haml' haml (2.2.2) [v] lib/haml/helpers/action_view_mods.rb:13:in `render' app/controllers/photos_controller.rb:81:in `crop' app/controllers/photos_controller.rb:24:in `edit' haml (2.2.2) [v] rails/./lib/sass/plugin/rails.rb:19:in `process' lib/flash_session_cookie_middleware.rb:14:in `call' vendor/gems/hoptoad_notifier-2.2.2/lib/hoptoad_notifier/rack.rb:27:in `call' ** [Hoptoad] Failure: Net::HTTPClientError ** [Hoptoad] Environment Info: [Ruby: 1.8.6] [Rails: 2.3.3] [Env: production] ** [Hoptoad] Response from Hoptoad: No project exists with the given API key. Rendering /data/HQ_Channel/releases/20100524111501/public/500.html (500 Internal Server Error) And then a little later, I got this : ActionView::TemplateError (/data/HQ_Channel/releases/20100524111501/public/system/photos/15453/original/DSC05193.JPG is not recognized by the 'identify' command.) on line #4 of app/views/media/crop_photo.js.haml: 1: == $("#media_header").html('#{ escape_javascript(render :partial = 'media/crop_photo') }').slideDown("slow"); 2: 3: :plain 4: function updateForm(coords) 5: { 6: var rx = #{PHOTO_IMAGE_WIDTH} / coords.w; 7: var ry = #{PHOTO_IMAGE_HEIGHT} / coords.h; vendor/gems/thoughtbot-paperclip-2.3.1/lib/paperclip/geometry.rb:24:in `from_file' app/models/photo.rb:68:in `photo_geometry' app/views/media/crop_photo.js.haml:4:in `_run_haml_app47views47media47crop_photo46js46haml' haml (2.2.2) [v] lib/haml/helpers/action_view_mods.rb:13:in `render' app/controllers/photos_controller.rb:81:in `crop' app/controllers/photos_controller.rb:24:in `edit' haml (2.2.2) [v] rails/./lib/sass/plugin/rails.rb:19:in `process' lib/flash_session_cookie_middleware.rb:14:in `call' vendor/gems/hoptoad_notifier-2.2.2/lib/hoptoad_notifier/rack.rb:27:in `call' ** [Hoptoad] Failure: Net::HTTPClientError ** [Hoptoad] Environment Info: [Ruby: 1.8.6] [Rails: 2.3.3] [Env: production] ** [Hoptoad] Response from Hoptoad: No project exists with the given API key. Rendering /data/HQ_Channel/releases/20100524111501/public/500.html (500 Internal Server Error)

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• VIM Blockwise Insert

  - by tesmar

  HI all! I would like to insert a hash at the beginning of a selected block of text in VIM (ruby comment). I selected the lines in Visual Mode, but how do I perform the same operation to all lines? Thank you in advance!

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• Parameters through postback

  - by Brian Roisentul

  I'm working with Ruby on rails 2.3.4 and I'd like to pass some parameters from one page to another ones the first one is submitted. For example: On the first page, I have a form that when it's filled a Preview button can be clicked to check all the info entered before submitting the form. That button redirects to another page with the info entered before, but I don't know how to get it in the second page.

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• Icecast server status

  - by maxt3r

  Does anybody know, how to check if broadcast is online or offline in Icecast2 server? Ruby preferred.

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• Expire models in Rails

  - by Koning Baard XIV

  I'm creating a simple paste-bin in Ruby on Rails, which will have an expire-feature. With this, people can select a date when the paste will be deleted automatically. How can I implement this? I was thinking of a cronjob, but maybe there is a more platform-independent way, by defining this in the model itself. Can anyone help me? Thanks.

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• Add custom method to string object [closed]

  - by cru3l

  Possible Duplicate: Can I add custom methods/attributes to built-in Python types? In Ruby you can override any built-in object class with custom method, like this: class String def sayHello return self+" is saying hello!" end end puts 'JOHN'.downcase.sayHello # >>> 'john is saying hello!' How can i do that in python? Is there a normally way or just hacks?

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• Find a set of common elements from a multi-dimensional array recursively

  - by shreyas

  I have a multi-dimensional array: a=[[2,3,4],[1,3,4],[1,2],[1,2,3,4]] i've to compare all the 4 sub-arrays and get common elements.Next,take 3 subarrays at a time and get common elements.then take 2 sub arrays at a time and get common elements, in RUBY.

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• How do I implement real time front end updates using node.js+ + ror?

  - by ming yeow

  what is the best way to implement real time updates in ruby on rails using Node.JS? It would be great to hear either real examples or your thoughts on alternative solutions

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• Why must I use local path rather than 'svn://' with SVN bindings?

  - by Chad Johnson

  I'm using the Ruby SVN bindings built with SWIG. Here's a little tutorial. When I do this @repository = Svn::Repos.open('/path/to/repository') I can access the repository fine. But when I do this @repository = Svn::Repos.open('svn://localhost/some/path') It fails with /SourceCache/subversion/subversion-35/subversion/subversion/libsvn_subr/io.c:2710: 2: Can't open file 'svn://localhost/format': No such file or directory When I do this from the command line, I do get output svn ls svn://localhost/some/path Any ideas why I can't use the svn:// protocol?

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• Check directory for files, retrieve first file

  - by Lowgain

  I'm writing a small ruby daemon that I am hoping will do the following: Check if a specific directory has files (in this case, .yml files) If so, take the first file (numerically sorted preferrably), and parse into a hash Do a 'yield', with this hash as the argument What I have right now is like: loop do get_next_in_queue { |s| THINGS } end def get_next_in_queue queue_dir = Dir[File.dirname(__FILE__)+'/../queue'] info = YAML::load_file(queue_dir[0]) #not sure if this works or not yield info end I'd like to make the yield conditional if possible, so it only happens if a file is actually found. Thanks!

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• Postgres database to mysql database conversion

  - by sangeethkumar n

  Is there any ruby script for converting postgresql database to mysql database. I have secrhed lot many sites but i couldnt get that. Please suggest me

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• Is it worth learning C# or Java in 2010

  - by Dhawal

  We are in web era standalone applications are almost gone everyone wants their internet application to run inside browser, programming languages like Ruby, Python and scala are becoming more and more mainstream. Sometimes I wonder what these programming language offer which make them top choice of IT companies, if I plan to become a freelance web developer is it worth learning C# or Java. I read beginner's book for both of them, but to master any of them require some time investment.

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• StringScanner scanning IO instead of a string

  - by jes5199

  I've got a parser written using ruby's standard StringScanner. It would be nice if I could use it on streaming files. Is there an equivalent to StringScanner that doesn't require me to load the whole string into memory?

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• rake does not returning anything

  - by CHID

  Hi, I jus created a rails application. I created a model using ruby script/generate model Article next i edited the my articles.rb file by adding these lines in self.up method def self.up create_table :articles do |t| t.string :title t.text :body t.string :published_at t.timestamps end end Now i ran rake db:migrate . But migrate does not work, it simply does no print anything. Anyone knows where i am going wrong?

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• require file use dirname(__FILE__) or just requre filename?

  - by user285020

  I have a file at lib directory in my rails project. like this a (directory) a1 a2 a.rb when I in a.rb require a1. require 'a/a1' it will warn me /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- a/a1 (MissingSourceFile) but use dirname(FILE), it work. require File.dirname(__FILE__) + '/a/a1 why?

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• Testing value of each related model

  - by Novapax

  Does Ruby (or Rails) provide an easy way to accomplish the following: if @author.articles.each(:published == true) puts "all articles of this author are published" end I think the example speaks for itself.

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• Sinatra programatically get port and other information about service

  - by Poul

  I have a sinatra service foo.rb To run it I on a different port I would type "ruby foo.rb -p 5000". While the program is running I would like to be able to get the port (in this case 5000) and other information. Is there a way to get info like this while the app is running? Thanks

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• Looping through an array while adding the data to a string and finally returning it, a faster way?

  - by Hadi

  Getting the customer's to_s method by looping through Is there a Ruby idiom to write the code in 1 line (or shorter than 3 lines of code)? def method string = "" @customers.each { |customer| string += customer.to_s + "\n" } string end

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• why the sexp has array in the end

  - by dorelal

  RubyParser.new.parse "1+1" s(:call, s(:lit, 1), :+, s(:array, s(:lit, 1))) Above code is from this link Why there is array after + in the Sexp. I am just trying to learn ruby parser and the whole AST thing. I have been programming for a while but have no formal education in computer science. So do point to good article which explains AST etc. Please no dragon book. I tried couple of times but couldn't understand much of that book

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• cattr_accessor outside of rails

  - by JP

  I'm trying to use the google_search ruby library (code follows) but it complains that 'cattr_accessor is an undefined method' - any ideas why this might be or how I could fix it? require 'rubygems' require 'google_search' GoogleSearch.web :q => "pink floyd"

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• Rails or Sinatra? which is good to start learning, for a php programmer?

  - by user187809

  I've been working far too long with php and getting bored with it. I also want to learn a new language. I've been using Ruby and like it. I've to decide between Rails and Sinatra, which one would you recommend? Is it true that Sinatra can't be used to build complex apps, and its only for simple apps?

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• validation of special characters

  - by jpallavi

  i want to put validation in ruby on rails that my username should not contain special characters like !@#$%^*()_-+=/<?:'";. Please tell me how can i implement it in my code.

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• Restricting Edit and Delete

  - by phleet

  I want to be able to edit and delete resources myself, but not allow users of the application to do so. Is there an easy way of doing this in Rails? An incomplete solution would be just to remove the "delete" and "edit" buttons from the index view, but that doesn't disable their ability to do so via direct HTTP requests. Running Rails 2.2.2 and ruby 1.8.7

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