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• uninitialized constant Active Scaffold rails 2.3.5

  - by Kiva

  Hi guy, I update my rails application 2.0.2 to 2.3.5. I use active scaffold for the administration part. I change nothing in my code but a problem is coming with the update. I have a controller 'admin/user_controller' to manage users. Here is the code of the controller: class Admin::UserController < ApplicationController layout…

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• Ruby on Rails vs Grails vs. Spring ROO vs. Spring App

  - by lizdev

  Hi, I'm planning on writing a simple web application that will be used by lots of users (as complicated as a simple bookmarking app) and I'm trying to decide which framework/language to use. I'm very experienced with Spring/Hibernate and Java in general but new to both Grails and RoR (and Spring ROO). The only reason I'm considering RoR…

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• Ruby on Rails: How to sanitize a string for SQL when not using find?

  - by williamjones

  I'm trying to sanitize a string that involves user input without having to resort to manually crafting my own possibly buggy regex if possible, however, if that is the only way I would also appreciate if anyone can point me in the right direction to a regex that is unlikely to be missing anything. There are a number of methods in Rails…

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• Dynamic State Machine in Ruby? Do State Machines Have to be Classes?

  - by viatropos

  Question is, are state machines always defined statically (on classes)? Or is there a way for me to have it so each instance of the class with has it's own set of states? I'm checking out Stonepath for implementing a Task Engine. I don't really see the distinction between "states" and "tasks" in there, so I'm thinking I could just…

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• How do I create a SOAP envelope in Ruby?

  - by Angela

  I am using Savon to build the client, but want to kno how to create the actual envelope. I am thinking of using Nokogiri XML Builder and just pass in the values, but not sure if that's the right way. The SOAP envelope specs can be found here: http://api.postalmethods.com/PostalWS.asmx?op=UploadFile

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• Has anyone written Ruby code to programmatically modify their DNS?

  - by Chad

  There are a bunch of services (dyndns, nettica, etc.) that offer API's but I'm having trouble with Nettica's and I was just wondering if anyone has a nice gem suggestion for any of the DNS services... I'm not set on one or the other. Thanks for any help in advance. Chad

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• What is the right way to initialize a constant in Ruby?

  - by zbrimhall

  I have a simple class that defines some constants, e.g.: module Foo class Bar BAZ = "bof" ... Everything is puppies and rainbows until I tell Rake to run all my Test::Unit tests. When it does, I get warnings: bar.rb:3: warning: already initialized constant BAZ My habit has been to avoid these warnings by making the…

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• How to use class_eval <<-"end_eval" in Ruby? Not parsing correctly

  - by viatropos

  I would like to define dynamic methods based on some options people give when instantiating it. So in their AR model, they'd do something like this: acts_as_something :class_name => "CustomClass" I'm trying to implement that like so: module MyModule def self.included(base) as = Config.class_name.underscore …

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• Ruby on Rails redirect_to not functioning in IF statement?

  - by Hard-Boiled Wonderland

  Hi, I am redirecting a POST request to ensure the URL is correct along with other things. The redirect worked fine before I added in the if statements for town below: if !params[:address].blank? town = Town.find(:all, :conditions => ["name = ?", params[:address]]) @towns = town if !town.blank? redirect_to…

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• Would Ruby on Rails be appropriate for this Foreign Language project?

  - by Lynne Overesch-Maister

  I'm a Spanish professor & computer groupie. About 15 years ago, I authored in HyperCard a series of verb conjugation programs that are now completely out of date with respect to System OS X. I would like to redo these programs myself because I had a lot of fun doing them last time (mostly I coded while my son…

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• On Ruby on Rails, <%= or <% should only matter whether it is show or no show, but why will it give

  - by Jian Lin

  The following code: <div id="vote_form"> <%= form_remote_tag :url => story_votes_path(@story) do %> <%= submit_tag 'shove it' %> <% end %> </div> gives compilation error while if the first <%= is replaced with <%, then everything works. I thought they only differ…

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• What is the Ruby/Rails equivalent of Python's urllib.quote_plus?

  - by Davy8

  Basically url escapes a string except uses '+' instead of '%20' for spaces.

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• In Ruby are there any related applications of the syntax: class << self ... end

  - by pez_dispenser

  class << self attr_accessor :n, :totalX, :totalY end The syntax above is used for defining class instance variables. But when I think about what syntax implies, it doesn't make any sense to me, so I'm wondering if this type of syntax is used for any other types of definitions. My point of confusion here is…

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• Ruby on Rails, Array to HTML table, controller or view?

  - by SooDesuNe

  In my rails app the model is fetching some XML and returning an array. I want each array item (they are all text typed) to ultimately be a cell in an HTML table. Does the logic of turning the array elements into the HTML table belong in the controller or the view? Of course either will work, I'd like your…

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• Ruby on Rails: How to sanitize a string for SQL when not using find and other built-in methods?

  - by williamjones

  I'm trying to sanitize a string that involves user input without having to resort to manually crafting my own possibly buggy regex if possible. There are a number of methods in Rails that can allow you to enter in native SQL commands, how do people escape user input for those? The question I'm asking is a…

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• In Ruby, what is good way to filter all the methods of an object that contain the word "time" in it?

  - by Jian Lin

  I tried the following and it was partly working: >> s.methods.map {|n| n if n =~ /time/} => [nil, nil, nil, nil, nil, nil, nil, nil, "skip_time_zone_conversion_for_attri butes", nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, ni l, nil, nil, nil, nil, nil, nil, nil, nil, nil,…

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• How do I validate XML via RELAX NG in Ruby?

  - by cdleary

  The REXML module appears to have support for RELAX NG validation, but the docs don't have any real information on using the validation portion of the framework. How would you validate an XML document with a RELAX NG schema? A code snippet would be most helpful. TIA!

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• i want the ruby code of the php code i have given inside , please help me out

  - by Arpit Vaishnav

  <?php // amcharts.com export to image utility // set image type (gif/png/jpeg) $imgtype = 'jpeg'; // set image quality (from 0 to 100, not applicable to gif) $imgquality = 100; // get data from $_POST or $_GET ? $data = &$_POST; // get image dimensions $width = (int) $data['width'];…

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• Ruby on Rails: How to get ActiveRecord to show the next id (last + 1)?

  - by randombits

  Is there a compact way with ActiveRecord to query for what id it's going to use next if an object was going to be persisted to the database? In SQL a query like this would look something like: SELECT max(id) + 1 FROM some_table;

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• What is the right way to make a new XMLHttpRequest from an RJS response in Ruby on Rails?

  - by Yuri Baranov

  I'm trying to come closer to a solution for the problem of my previous question. The scheme I would like to try is following: User requests an action from RoR controller. Action makes some database queries, makes some calculations, sets some session variable(s) and returns some RJS code as the response.…

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• Is it legal to stub the #class method of a Mock object when using RSpec in a Ruby on Rails applicati

  - by MiniQuark

  I would like to stub the #class method of a mock object: describe Letter do before(:each) do @john = mock("John") @john.stub!(:id).and_return(5) @john.stub!(:class).and_return(Person) # is this ok? @john.stub!(:name).and_return("John F.") Person.stub!(:find).and_return(@john) end …

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• Ruby page loading very very slowly - how should I speed it up?

  - by Elliot

  Hey guys, I'm going to try and describe the code in my view, without actually posting all the garbage: It has a standard shell (header, footer etc. in the layout) this is also where the sub navigation exists which is based on a loop (to find the amount of options) - on this page, we have 6 subnav links. …

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• Regular Expression to Match File/Directory Path in Ruby?

  - by viatropos

  What is the simplest regular expression to match a Directory or File such as the one below? The recursiveness of it is tricking me. something/another/one-more/level to/go!??123_done.doc

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• How to update EXIF tags of a picture file in Ruby ?

  - by aurels

  Title says everything.

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• Ruby: Is there a better way to iterate over multiple (big) files?

  - by zxcvbnm

  Here's what I'm doing (sorry for the variable names, I'm not using those in my code): File.open("out_file_1.txt", "w") do |out_1| File.open("out_file_2.txt", "w") do |out_2| File.open_and_process("in_file_1.txt", "r") do |in_1| File.open_and_process("in_file_2.txt", "r") do |in_2| …

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