Rails Ruby on Rails

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  Kieran P January 1st, 2010 @ 06:52 AM

  My understanding is that the Arel gem isn't released yet, which contains the latest changes. You will need to put this in your Gemfile and rebundle:

  gem 'arel', :git => 'git://github.com/rails/arel.git'
  

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  Conrad Taylor January 1st, 2010 @ 01:04 PM

  This issue has been resolved by updating the submodules, git submodule update, which was the missing piece of the puzzle. Then performing a git pull followed by a sudo rake install. Things are back to normal.

  @Kieran P - Thanks for the information because your information gave me the idea to revisit Rails 3.0.pre installation.

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  Matija Folnovic January 1st, 2010 @ 01:45 PM

  I'm having same problem...

  Conrad: tried your way, and I also tried to remove arel and init+update it again, and then sudo rake install, but still getting same error

  Kleran: I don't understand your way, in which Gemfile should I put that and what do I do next ?

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  Matija Folnovic January 1st, 2010 @ 02:06 PM

  Conrad: ok, fixed it somehow, I had to do: git clone git://github.com/rails/arel.git instead of doying git submodule update since this didn't give me latest code:

  Submodule path 'arel': checked out '0faeb5047407348533db952d9cf93ea59d2526dc'
  but newest commit is: c836c3ed10110d0446c4fce87d36c3f6c39b3cda

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  Conrad Taylor January 2nd, 2010 @ 04:24 AM

  Matija, my previous instructions were not correct. One would need to perform the operations in the following order instead:

  
  git pull
  git submodule update
  sudo rake install
  

  In short, one will need to update the master project (i.e. rails) before updating any of its submodules (i.e. rack and arel).

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  Matija Folnovic January 2nd, 2010 @ 11:14 AM

  just tried that too, and still ( tried first without first two steps, and same thing ):
  

  mfolnovic@mfolnovic-laptop:/media/Elements/mfolnovic/Projects/rails$ rm -r arel
  mfolnovic@mfolnovic-laptop:/media/Elements/mfolnovic/Projects/rails$ git submodule init
  mfolnovic@mfolnovic-laptop:/media/Elements/mfolnovic/Projects/rails$ git submodule update
  Initialized empty Git repository in /media/Elements/mfolnovic/Projects/rails/arel/.git/
  remote: Counting objects: 4968, done.
  remote: Compressing objects: 100% (1882/1882), done.
  remote: Total 4968 (delta 3092), reused 4604 (delta 2879)
  Receiving objects: 100% (4968/4968), 517.32 KiB | 288 KiB/s, done.
  Resolving deltas: 100% (3092/3092), done.
  Submodule path 'arel': checked out '0faeb5047407348533db952d9cf93ea59d2526dc'
  

  but deleting and cloning from repo gets me to correct commit :P

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  Matija Folnovic January 2nd, 2010 @ 11:16 AM

  and I also did git pull before all this... ( argh, why I can't edit my comments :S )

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  Conrad Taylor January 2nd, 2010 @ 12:05 PM

  Matija, after removing the entire rails repository and re-installing everything, my initial still exists. It appears that AR is attempting to call a Arel method, 'having', which doesn't exist:

  
  /opt/local/lib/ruby/gems/1.9.1/gems/activerecord-3.0.pre/lib/active_record/relation/query_methods.rb:39:in `having'
  

  The extract of the method contains the following:

  
      def having(*args)
        return spawn if args.blank?
  
        if [String, Hash, Array].include?(args.first.class)
          havings = @klass.send(:merge_conditions, args.size > 1 ? Array.wrap(args) : args.first)
        else
          havings = args.first
        end
  
        spawn(@relation.having(havings))  # NoMethodError (undefined method `having' for #<Arel::Project:0x2da4bc8>)
      end
  

  Next, the 'git pull' of the parent project, rails, is associated with a certain commit of arel and a certain commit of rack. Thus, after comparing the sha1 hash on github.com with the sha1 hash on my system for the arel project, I would say that I have the latest
  source.

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  Josh Graham January 6th, 2010 @ 02:33 AM

  +1 to Kieren P's suggestion.

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  Conrad Taylor January 8th, 2010 @ 02:31 PM

  • Tag changed from “arel, rails3” to “arel, rails3, ruby1.9”

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  Conrad Taylor January 11th, 2010 @ 02:03 AM

  After updating my Gemfile, it seems that things are finally working again. You can find my Gemfile below:

  # Edit this Gemfile to bundle your application's dependencies.
  
  git "git://github.com/rails/arel.git"
  
  ## Bundle edge rails:
  gem "rails", "3.0.pre", :git => "git://github.com/rails/rails.git"
  
  ## Bundle the gems you use:
  gem "sqlite3-ruby", :require_as => "sqlite3"
  gem "rack"
  gem "tzinfo"
  

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  Steve St. Martin January 12th, 2010 @ 04:17 AM

  • Tag changed from “arel, rails3, ruby1.9” to “arel, invalid, rails3, ruby1.9”

  I was able to successfully create a working rails app with the above Gemfile, seems issues are only encountered when using directory within your Gemfile and pointing it at the initial clone.

• 

  Emilio Tagua March 12th, 2010 @ 06:54 PM

  • State changed from “new” to “resolved”

  This was a problem in Arel release not including having, this issue is already solved.