I'm beginning to learn Ruby on Rails, and looking at other peoples code. Is there any way to take an exisiting codebase and create object relationship diagrams or Entity relationship diagrams (ERD's) ? I know Visio can do some things given a database, but I was hoping to produce diagrams of classes, objects and objects. ...
Does ruby allow you to treat warnings as errors? One reason I'd like to do this is to ensure that if heckle removing a line of code means that a warning occurs, I have the option of ensuring that the mutant get killed. ...
I have been following an RSpec tutorial on one of my machines, in the hope of learning more about BDD and TDD. My setup was with Rails 2.2.2 and Rspec 1.1.12 Tonight I decided to continue on my primary machine and moved my code from my portable to my desktop. Not having RSpec, i installed the gem . . . sudo gem install rspec sudo gem ...
I am trying to get a specific music cd from Amazon using ruby-aaws. il = ItemSearch.new( 'Music', { 'Artist' => artist_title, 'Title' => album_name } ) rg = ResponseGroup.new( 'Large' ) req = Request.new(AMAZON_KEY_ID, AMAZON_ASSOCIATES_ID, 'de') resp = req.search( il, rg, 5) But this fails. It only s...
I have a process that runs on cron every five minutes. Usually, it takes only a few seconds to run, but sometimes it takes several minutes. I want to ensure that only one version of this is running at a time. I tried an obvious way... File.open("/tmp/indexer_lock.tmp",'w') do |f| exit unless f.flock(File::LOCK_EX) end ...but it's n...
I'd like to be able to show the progress of a file copy operation when copying files using Ruby (currently using FileUtils.cp) I've tried setting the verbose option to true but that just seems to show me the copy command issued. I'm running this script from command line at the moment so ideally I'd like to be able to present something l...
Hi all, I'm using Ruby Qt bindings. I'm trying to make a square widget (checker board), but it doesn't seem to work. This is the code that I tried What is the proper way to making a widget that maintains it's aspect ratio? ...
I am using wxruby but as far as I can tell its not only a ruby problem. If I try to copy and paste rich text into the wxRichTextCtrl it loses all the formatting. What am I missing? Is there any way to make this work? ...
I'm looking for Ruby grammar in BNF form. Is there an official version? ...
There is a website which gives me the information of pin codes of a particular state for example indian postal website, gives the details when I select the state in the drop down. I need to write the script in ruby which would create the CSV file with all the data for a particular state. Today is my first day on ruby and not sure how ...
Times farthest in the past and farthest in the future that can be represented? Is it absolute moments in time, or distance in time from the present moment? I couldn't find it in the docs for the Time class. Does it depend on the system? If so, how can I access it in my code? UPDATE After some experimentation, I found that it's from ...
Or does this method just indicate a unique integer that each object has? ...
The wikipedia entry on Symbol tables is a good reference: http://en.wikipedia.org/wiki/Symbol_table But as I try to understand symbols in Ruby and how they are represented in the Array of Symbols (returned by the Symbol.all_symbols method), I'm wondering whether Ruby's approach to the symbol table has any important differences from o...
Rubyinside mentioned a blog post on how to speed up gem installation by not installing RI or RDoc. Is it possible to install a gem and subsequently install documentation at a later date, so you can hack in haste and RTFM at leisure? ...
This has been asked before but not exactly in the same way (other users had Rails/servers issues, and I'm not having the issue with OLD_PASSWORDS) I'm trying to make my Ruby app work with MySQL using Ruby-MySQL, The setup is supposed to be quite simple: % ruby ./setup.rb % ruby ./test.rb hostname user passwd # ruby ./install.rb How...
I want to call a named_scope that will only return one record, but the named_scope returns an array, that's not a big deal as I can just chain it with .first: Model.named_scope(param).first and this works, what I am struggling with is how to stub the chained call. Does anyone have a reference or an answer on how I would go about achie...
I have a rails app I'm trying to set up with sortable lists using the acts_as_list plugin. The position field in the db is getting updated, but when the page is rendered, the order is not considered. I'm looking for some help, I guess. Here are my models... class QuestionMembership < ActiveRecord::Base belongs_to :form belongs_...
In other contexts I know this << is called the bitshift operator. Is there a name for it when it's just used for append operations like you would do in an array or string (not sure what else you can append with it)? I'd like to be able to use an English word to refer to it instead of saying "you know, the operator with the two left arro...
Kinda odd question here: when you go with rpsec instead of test::unit on rails, what do you do with the test dir? Keep it (for any compatibility issues maybe?) or remove it? ...
Hi, Apologies if this is an overly elementary question, but what are the pipe symbols for in Ruby? I'm learning Ruby and RoR, coming from a PHP and Java background, but I keep coming across code like this: def new @post = Post.new respond_to do |format| format.html # new.html.erb format.xml { render :xml => @post } end...