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constantize now less robust in 2.3.3

#2975

Constantize cannot access internal classes declared in super classes in 2.3.3 but seems to be working fine in 2.1.0

class A
 class B
 end 
end

class C < A
end

In 2.3.3 console:

C::B => A::B

'C::B'.constantize NameError: uninitialized constant C::B

from /Users/tim/src/property/rails23/vendor/rails/activesupport/lib/active_support/dependencies.rb:105:in `const_missing'
from /Users/tim/src/property/rails23/vendor/rails/activesupport/lib/active_support/inflector.rb:361:in `constantize'
from /Users/tim/src/property/rails23/vendor/rails/activesupport/lib/active_support/inflector.rb:360:in `each'
from /Users/tim/src/property/rails23/vendor/rails/activesupport/lib/active_support/inflector.rb:360:in `constantize'
from /Users/tim/src/property/rails23/vendor/rails/activesupport/lib/active_support/core_ext/string/inflections.rb:162:in `constantize'
from (irb):4

But it works fine in 2.1.0:

'C::B'.constantize => A::B

Reported by Rajesh · July 30th, 2009 @ 07:50 PM

Activity

CancelProfileIsBroken
- Tag changed from 2.3.3, constantize to 2.3.3, bugmash, constantize
August 7th, 2009 @ 02:39 PM
Ryan Bigg
Here's a patch that proves that it is broken.
- inflector_failing_test.diff 1.15 KB
August 8th, 2009 @ 01:26 AM
Michael Koziarski
- State changed from new to wontfix
This appears to be 'just how it is' with ruby unfortunately:
```
>> Gamma.const_get("Beta")
=> Alpha::Beta
>> Gamma.const_defined?("Beta")
=> false
```
We check const_defined? before calling const_get and ruby returns false here. This is a ruby bug / feature and should probably be fixed upstream.

If you get a work around from upstream, we'd be happy to use it here.
August 8th, 2009 @ 03:06 AM
CancelProfileIsBroken
- Tag changed from 2.3.3, bugmash, constantize to 2.3.3, constantize
August 8th, 2009 @ 11:08 PM

Akira Matsuda

@nzkoz

Indeed, it's already fixed in Ruby 1.9

% cat const_defined.rb
class Alpha
  class Beta; end
end

class Gamma < Alpha
end

puts Gamma::const_get('Alpha')

puts Gamma::const_defined?('Alpha')

% ruby18 const_defined.rb
Alpha
false

% ruby19 const_defined.rb
Alpha
true

I'm gonna ask Ruby 1.8.x maintainers whether this could be backported to 1.8 on not.

August 8th, 2009 @ 11:52 PM

Michael Koziarski
Sounds good Akira.

August 9th, 2009 @ 12:06 AM