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• One way Has-Many-Through

  - by Hock

  Hello, I have a Category, a Subcategory and a Product model. I have: Category has_many Subcategories Subcategory has_many Products Subcategory belongs_to Category Product belongs_to Subcategory Is there a way to have something like Category has_many Projects through Subcategories ? The 'normal' rails way wouldn't work because "subcategory" doesn't belongs to product so product does not have a subcategory_id field. Instead, I need the query to be something like SELECT * FROM products WHERE id IN category.subcategory_ids Is there a way to do that? Thanks, Nicolás Hock Isaza

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• What is the difference between searchlogic and other fulltext search plugins?

  - by Paddy

  I am looking for an alternative to acts_as_solr or thinkingsphinx for fulltext search in my Rails app. Came across searchlogic. Does it support indexing? I am planning to host my app on heroku and I want an alternative because heroku charges for Websolr. I am aware of the alternative way of using texticle or acts_as_tsearch but i want to use searchlogic for its features.

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• Issues loading IronRuby.Rack assembly

  - by Johnsonch

  I'm trying to get IronRuby on Rails running with iis7 server 2k8 and can only get as far as it cannot load the assembly 'IronRuby.Rack' (Screen Shot: http://grab.by/3VZm) has anyone gotten this working? Any tips you can give me? Thanks, -CJ

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• Drawing on top of every windows on X11

  - by Vítor Baptista

  Hi, I am trying to make an arcade machine. The user will purchase credits, which will allow him to play for X minutes. I want to write "9:42 minutes left" at the left corner of the screen, even if he's playing a full screen game (UrbanTerror, for example). I would really like if I could do this with Ruby, but any other language is OK. Any ideas? Thanks in advance.

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• Which database and language is better at handling Unicode?

  - by user187809

  which database should I use, if my application is going to be in multiple languages (including Chinese, Japanese etc)? In other words, is MySQL better or worse than Postgres to handle unicode etc? (these are the only two databases my hosting company has) Also, which language is better for handling unicode? PHP or Ruby/Rails?

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• Where goes signal sent to process which called system?

  - by tig

  Given a very simple ruby script: child = fork do system 'sleep 10000' end 5.times do sleep 1 puts "send kill to #{child}" Process.kill("QUIT", child) end QUIT signal is just lost. Where does it go? Something with default handler which just ignores it?

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• how to write nslookup programmatically?

  - by Jian Lin

  instead of using exec in our script to do an nslookup, is there an easy way to write it programmatically in PHP, Python, or Ruby?

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• Who use class variables in SOAP calls with Savon?

  - by Steffen Roller

  I'm writing a little client using Ruby and Savon. The interface changed significantly from version 0.7 to 0.8.x. All my calls don't work anymore :-(. How can I pass on a local member variable. Please see the example, @userName and @userPassword are not defined within the block. begin @response = @authentication_svc.request :wsdl, "AuthenticateUser" do http.headers["SOAPAction"] = "AuthenticateUser" soap.body = "#{@userName}#{@passwd}" end rescue Savon::SOAP::Fault = e @last_soap_error = e.message end

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• How to invoke a method every time database is modified

  - by titaniumdecoy

  I am writing a Ruby on Rails app and I want a method to be called every time the database is modified. Is it possible to do this without inserting a method call in every location where the database is modified?

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• More elegant way to write this?

  - by tesmar

  Hi, I am trying to make a multi-dimensional array of characters in ruby, and this works, but is there a more elegant way? def initialize(text) @map = Array.new i = 0 text.split("\n").each do |x| @map[i] = x.scan(/./) i += 1 end #@map = text end#constructor

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• Is there any plugin which will help me validate model on client-side?

  - by tig

  I need to validate form on client-side and I was wondering if there is a rails plugin which will help me in this task (maybe it will build javascript needed to validate certain model)?

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• Tired of ASP.NET, which of the following should I learn and why?

  - by ke42

  Which of the following technology is easy to learn and fun for developing a website? If you could only pick one which would it be and why Clojure/Compojure+Ring/Moustache+Ring Groovy/Grails Python/Django Ruby/Rails Turbogear Cappuccino or Sproutcore Javascript/jQuery

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• Possible to embed markdown within erb?

  - by Gaius Parx

  If you use haml as rails view template, you can write portion of your page using markdown by using the ":markdown" filter. Is is possible to do the same using erb?

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• The Document for selenium test!

  - by Small Wolf

  I want to use selenium test to cover my rails project ! but i just find little documents on selenium test . I want someone to give me some documents for selenium test of all types !like website ,pdf ,text etc. you can sent them to my gmail [email protected] Thank you ,and best regards!

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• I really dont understand nothing about git and plugin install from there

  - by Totty

  I need to install a plugin like this: script/plugin install git://github.com/apotonick/cells.git and it just creates a new empty folder in the plugins dir, "cells" (i use eclipse and rails) Is that a bad question, i dont get it?(-6 votes)

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• Problem with writing a file to excel with spreadsheet

  - by winter sun

  I am trying to write excel file by using ruby 1.9 spreadsheet version 0.6.4.1 on windows. Everything is going ok, until I get to the book.write statement when I write book.write "c:/spreadsheet/excel-file.xls I keep getting the following error No such file or directory - c:/spreadsheet/excel-file.xls Can anyone tell me what I should change in this path name?

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• "OR" Operator must be placed at end of previous line? (unexpected tOROP)

  - by akonsu

  I am running Ruby 1.9. This is a valid syntax: items = (data['DELETE'] || data['delete'] || data['GET'] || data['get'] || data['POST'] || data['post']) But this gives me an error: items = (data['DELETE'] || data['delete'] || data['GET'] || data['get'] || data['POST'] || data['post']) t.rb:8: syntax error, unexpected tOROP, expecting ')' || data['GET'] || data['get'] |... ^ Why?!

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• Easiest way to split up a large controller file

  - by timpone

  I have a rails controller file that is too large (~900 lines - api_controller). I'd like to just split it up like something like this: api_controller.rb api_controller_item_admin.rb api_controller_web.rb I don't want to split into multiple controllers. What would be the preferred way to do this? Could I just require the new parts at the end? like: require './api_controller_item_admin' require './api_controller_web'

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• why do I need the @ for setting variable value

  - by Saad

  I'm a little confused about scope of variables, in ruby I wrote a test program: class Test attr_reader :tester def initialize(data) @tester = data end def getData tester end end puts Test.new(11).getData now this works fine, the attr_reader, but my confusion is that since I've define attr_reader :tester then why can't I go tester = data rather then @tester = data, because when retrieving the data in getData I only have to write tester and not @tester

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• What is called a rakefile ?

  - by Bragaadeesh

  Hi, I have started learning Ruby and just tried out my first hello world program in NetBeans IDE. I have one doubt, I can see that the new project wizard created set of package structure. It had one "Rakefile" in it. What does that mean and what is the use of it? Thanks, Bragaadeesh.

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• Ignoring a character along with word boundary in regex

  - by DavidP6

  I am using gsub in Ruby to make a word within text bold. I am using a word boundary so as to not make letters within other words bold, but am finding that this ignores words that have a quote after them. For example: text.gsub(/#{word}\b/i, "<b>#{word}</b>") text = "I said, 'look out below'" word = below In this case the word below is not made bold. Is there any way to ignore certain characters along with a word boundary?

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• Getting can't modify frozen string when using string.insert

  - by Richard

  Hi, This is a quick question. I have the following ruby code, which works fine. def add_zeros number, zeros number = number.to_s zeros_to_add = zeros - number.length zeros_to_add.times do number = "0#{number}" end number end But if I replace number = "0#{number}" With number.insert(0, "0") Then I get TypeError: can't modify frozen string, does anyone know why this is?

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• Should I be using callbacks or should I override attributes?

  - by ryeguy

  What is the more "rails-like"? If I want to modify a model's property when it's set, should I do this: def url=(url) #remove session id self[:url] = url.split('?s=')[0] end or this? before_save do |record| #remove session id record.url = record.url.split('?s=')[0] end Is there any benefit for doing it one way or the other? If so, why? If not, which one is generally more common?

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• Nginx: check content-length before file upload takes place

  - by robw

  I'm trying to prevent users from uploading (accidentally or maliciously) very large files to my website. I have nginx max_client_body_size set to 4M, but if a file larger than this is uploaded, then it uploads the entire file before returning 413 (entity too large). I want to make nginx check the Content-Length header, so that it rejects the request before it's uploaded. Alternatively, a Rails solution would also be acceptable. Any help appreciated.

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• PayPal Payments Pro Sandbox requires membership?

  - by Kevin

  Do I need to pay the $30 just to play around in the sandbox for Website Payments Pro? I'm trying to get Active Merchant working in Rails, and it's giving me an error "invalid merchant configuration"... after digging around a bit it says I need to "accept the billing agreement" and/or sign up for the Payments Pro first. So, do I need to pay the $30 just to test in sandbox? Or is there another workaround for this error?

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