#4321 3.0.0b2 rails generator - no such file: singleton_class - Ruby on Rails

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#4321 ✓invalid

3.0.0b2 rails generator - no such file: singleton_class

Reported by makevoid | April 3rd, 2010 @ 07:25 PM

> rails --help

> rails whatever

  _GEMS_/gems/railties-3.0.0.beta2/lib/rails/generators.rb:6:in `require': no such file to load -- active_support/core_ext/object/singleton_class (LoadError)
from _GEMS_/gems/railties-3.0.0.beta2/lib/rails/generators.rb:6:in `<top (required)>'
from _GEMS_/gems/railties-3.0.0.beta2/lib/rails/commands/application.rb:10:in `require'
from _GEMS_/gems/railties-3.0.0.beta2/lib/rails/commands/application.rb:10:in `<top (required)>'
from _GEMS_/gems/railties-3.0.0.beta2/bin/rails:30:in `require'
from _GEMS_/gems/railties-3.0.0.beta2/bin/rails:30:in `<top (required)>'
from _GEMS_/bin/rails:19:in `load'
from _GEMS_/bin/rails:19:in `<main>'

I noticed by looking at activesupport 3.0.0b2 that singleton_class has been removed, so commenting the require (line 6) in http://github.com/rails/rails/blob/v3.0.0.beta2/railties/lib/rails/... will resolve the issue, but I haven't checked if somewhere something's using the removed class.

See you

Comments and changes to this ticket

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makevoid April 3rd, 2010 @ 07:26 PM
- no changes were found...
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makevoid April 3rd, 2010 @ 07:27 PM
- Tag changed from “rails3 generator activesupport singleton singleton_class error” to “activesupport, error, generator, rails3, railties, singleton, singleton_class”
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The_Lord April 7th, 2010 @ 11:39 PM
Hmm this may sound silly, but running gem cleanup (uninstalling the previous version) solves the problem. I had the same issue and after the cleanup generators work fine.
José Valim April 10th, 2010 @ 12:43 PM
- State changed from “new” to “invalid”
Can't verify. As The_Lord said, something is probably wrong in your setup.
José Valim April 10th, 2010 @ 01:10 PM
- Assigned user set to “José Valim”
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Fabio Akita April 18th, 2010 @ 06:41 PM
Interesting, I had the same error and I can confirm that running "gem cleanup" fixes it, but it should be warned that this new release conflicts with something from previous versions installed in the system.