How can I upgrade my Ruby Gems to the latest version "safely"?
- by leeand00
Is there any way that I can upgrade my Ruby Gems, and if it doesn't work (on what I'm upgrading them for), than rollback the changes?
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Search found 10455 results on 419 pages for 'ruby on rails 4'.
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How do you check the Gem Version in Ruby at Runtime?
- by viatropos
Is it possible to check the gem version of the currently loaded gem in a ruby/rails app? During debugging, I would like to be able to do something like: puts RubyGem.loaded_version(:active_support) Anything like that exist?Read the article
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To Interface or Not?: Creating a polymorphic model relationship in Ruby on Rails dynamically..
- by Globalkeith
Please bear with me for a moment as I try to explain exactly what I would like to achieve. In my Ruby on Rails application I have a model called Page. It represents a web page. I would like to enable the user to arbitrarily attach components to the page. Some examples of "components" would be Picture, PictureCollection, Video, VideoCollection, Background, Audio, Form, Comments. Currently I have a direct relationship between Page and Picture like this: class Page < ActiveRecord::Base has_many :pictures, :as => :imageable, :dependent => :destroy end class Picture < ActiveRecord::Base belongs_to :imageable, :polymorphic => true end This relationship enables the user to associate an arbitrary number of Pictures to the page. Now if I want to provide multiple collections i would need an additional model: class PictureCollection < ActiveRecord::Base belongs_to :collectionable, :polymorphic => true has_many :pictures, :as => :imageable, :dependent => :destroy end And alter Page to reference the new model: class Page < ActiveRecord::Base has_many :picture_collections, :as => :collectionable, :dependent => :destroy end Now it would be possible for the user to add any number of image collections to the page. However this is still very static in term of the :picture_collections reference in the Page model. If I add another "component", for example :video_collections, I would need to declare another reference in page for that component type. So my question is this: Do I need to add a new reference for each component type, or is there some other way? In Actionscript/Java I would declare an interface Component and make all components implement that interface, then I could just have a single attribute :components which contains all of the dynamically associated model objects. This is Rails, and I'm sure there is a great way to achieve this, but its a tricky one to Google. Perhaps you good people have some wise suggestions. Thanks in advance for taking the time to read and answer this.Read the article
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What is the difference between include and require in Ruby?
- by Owen
My question is similar to this one over here about include and extend. What's the difference between require and include in Ruby? If I just want to use the methods from a module in my class, should I require it or include it?Read the article
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"string_name = string_name[3..-1]" what could the following line of ruby code mean?
- by Mo
Hi, I'm looking at some external code and saw a line of Ruby code that looks like this string_name = string_name[3..-1] what does the [n..-x] do or mean? Thanks.Read the article
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Is there a nvl() function in Ruby or do I have to write it myself?
- by jva
I want to use an equivalent of Oracle's nvl() function in Ruby. Is there a built in function or do I have to write one myself?Read the article
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How do I link to an item in the public folder from views/controller_name/page1.html.erb in Ruby on R
- by ben
How do I link to an item in the public folder from views/controller_name/page1.html.erb in Ruby on Rails? Thanks for reading.Read the article
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What module(s) do I need to include to get 5.seconds to work in Ruby?
- by DJTripleThreat
Because apparently require 'date' doesn't include the method hours or seconds etc: undefined method `hours' for 5:Fixnum (NoMethodError) Am I missing something? Is 5.seconds only something you can do in Rails? If so, what is the require statement I need to get this to work in a ruby script?Read the article
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where can I find a good ruby excel parser that also had good documentation?
- by Chris Drappier
Hi All, I've spent some time today looking for a pure ruby library that will parse an excel workbook. I could find the parseexcel gem in the repos, but the problem is that I can't find any documentation on it. and the rdoc is pitiful. so, my question is 1) is there good documentation out there for this gem? 2) if not, is there another gem that does the same thing that has good documentation? thx :) -CRead the article
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Can I deploy a Ruby on Rails webapp to an IIS webserver?
- by Greg
Can I deploy a Ruby on Rails webapp to an IIS webserver? Is there any solid support for this somehow?Read the article
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Why does FastCGI not work well with Ruby on Rails?
- by Jian Lin
It is said that FastCGI doesn't work well with Ruby on Rails deployment. Why is that? In previous experience, something either works quite well or it might be fundamentally wrong. So if FastCGI is a viable solution, why is it not reliable with RoR? Does FastCGI work well with most any language / frameworks?Read the article
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How to safely let users run arbitrary Ruby code?
- by igul222
I realize this sounds a little crazy, but I'm working on a project for which I need a server to run user-provided Ruby code and return the result. I'm looking to prevent something like this: system("rm -rf /") eval("something_evil") # etc... I'm sure there must be some reasonably safe way to do this, as it already exists at places like tryruby.org. Any help is greatly appreciated, thanks!Read the article
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How to run my script x times a day? (ruby on linux)
- by Radek
I want to run my ruby script x times a day (the number might change) on my linux box. What would be the best way to do so if I do not want it to happen at the same time? I want the time (hour and minute) to be randomRead the article
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what's the best way to format an xml string in ruby?
- by rubiii
given an xml string like this: <some><nested><xml>value</xml></nested></some> what's the best option (using ruby) to format it into something readable like: <some> <nested> <xml>value</xml> </nested> </some>Read the article
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In Ruby on Rails, why http://localhost:3000/foobars/alt/1.xml not work?
- by Jian Lin
In Ruby on Rails, http://localhost:3000/foobars/alt/1 works but http://localhost:3000/foobars/alt/1.xml doesn't work. config/route.rb is map.connect ':controller/:action/:id' map.connect ':controller/:action/:id.:format' so supposedly it supports an id.format in the URL?Read the article
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Pull news from an RDF Feed using Ruby and Nokogiri?
- by Christian
I would like to pull the titleand description fields from the newsfeed at http://www.tagesschau.de/newsticker.rdf to feed them to the Mac's Text-to-Speech engine. My search for a nice Ruby Gem to do this has brought me to Nokogiri, but all examples that "pull something out" of a given XML seem to be centered around CSS somehow. Does anyone have any idea how to save the titleand description fields in an array?Read the article
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How do I implement real time front end updates using node.js + Ruby on Rails?
- 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.Read the article
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In Ruby, in the context of a class method, what are instance and class variables?
- by J. Pablo Fernández
If I have the following piece of Ruby code: class Blah def self.bleh @blih = "Hello" @@bloh = "World" end end What exactly are @blih and @@bloh? @blih is an instance variable in the class Blah, and @@bloh is a class variable in the class Blah, correct? Does it mean that @@bloh is a variable in Blah's class, Class?Read the article
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how can I capture **http response** from twitter.com? ( ruby + twitter gem)
- by Radek
I opened a question how can I capture response from twitter.com? ( ruby + twitter gem) to know if my update was successful. It is working fine... But I would like to know how I can capture HTTP Response Codes and Errors oauth = Twitter::OAuth.new('consumer token', 'consumer secret') oauth.authorize_from_access('access token', 'access secret') client = Twitter::Base.new(oauth) response = client.update('Heeeyyyyoooo from Twitter Gem!')Read the article
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ruby or python more suitable for scripting in all OSes?
- by fayer
if i want to script a mini-application (in the Terminal) in mac and windows, which one is preferred: ruby or python? or is there no major difference just a matter of taste? cause i know python definetely is a good scripting language. thanksRead the article
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How can I check if a Ruby array includes one of several values?
- by Colen
I have two Ruby arrays, and I need to see if they have any values in common. I could just loop through each of the values in one array and do include?() on the other, but I'm sure there's a better way. What is it? (The arrays both hold strings.) Thanks.Read the article
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How to emulate PHPs preg_split in ruby to capture offsets and delimiters?
- by dimus
I wonder if there is a way to get offsets and delimiters while I am splitting a string in ruby analagous to PHP preg_split: preg_split("/( | |<|>|\t|\n|\r|;|\.)/i", $html_string, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_OFFSET_CAPTURE); I imagine I can achieve it by traversing string by characters or using something heavy as treetop, but I would like to use something more convenient.Read the article
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What are PHP's advantages over Ruby on Rails and Django?
- by flybywire
PHP was the undisputed king of easy webapp development, until Ruby on Rails, Django, and other dynamic programming frameworks appeared. What are, in your opinion, PHP's strengths against the newcomers?Read the article
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Ruby equivalent to JavaScript’s encodeURIComponent that produces identical output?
- by Mo
Hi is there an equivalent ruby method to JavaScript encodeURIComponent method? i am using the URI.unescape(str) but it recognizes the "£" (after encodeURIComponent it becomes "%C2%A3") as a "?" sign. any solution's? thanksRead the article
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How do I put an escape character (NOT "escaped" character) in a Ruby regex?
- by Amy
I'm trying to parse a text file that has ANSI color sequences in it, e.g. \e[0;37m How can I build a regex to match this in Ruby?Read the article
