superclass mismatch for class Tempfile

rubyonrails-talk
1

I’ve been facing a problem when generating a model (or controller, …). I’m using rails 2.3.8 and ruby 1.8.7. Has anybody been facing anything like this? script/generate controller test /usr/lib/ruby/1.8/tempfile.rb:12: superclass mismatch for class Tempfile (TypeError) from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in require’ from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in require' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in new_constants_in’ from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in require' from /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/rails_generator/commands.rb:4 from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require’ from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in require' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in require’ from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in new_constants_in' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in require’ from /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/rails_generator.rb:39 from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in require’ from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in require' from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in new_constants_in’ from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in require' from /usr/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/commands/generate.rb:2 from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require’ from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:31:in `require’ from script/generate:3 Att. Rodrigo Felix de Almeida Promine Tecnologia da Informação - www.promine.com.br

Project Manager Sun Certified Java Programmer

2

Rodrigo Felix wrote:

I've been facing a problem when generating a model (or controller, ...). I'm using rails 2.3.8 and ruby 1.8.7. Has anybody been facing anything like this?

Do you have 2 instances of TempFile (tempfile.rb) or DelegateClass (delegate.rb) ? Googling around seems to suggest this as a problem.

-- raja

3

OK, but how can I know which class is instantiating TempFile or DelegateClass? I guess it is related to some plugin, but I`m not sure. Att. Rodrigo Felix de Almeida Promine Tecnologia da Informação - www.promine.com.br

Project Manager Sun Certified Java Programmer

4

I found the problem. I was defining a new method content_type in the class Tempfile. class Tempfile def content_type mime_type = IO.popen(“file --brief --mime #{path}”).gets unless path.blank? mime_type end end How can I make this without breaking generators? I’ve already tried the following one (exactly how it is on the tempfile.rb), but it didn’t work: class Tempfile < DelegateClass(File) … end Should I enclose it by module SomeModuleName … end ? Thanks in advance. Att. Rodrigo Felix de Almeida Promine Tecnologia da Informação - www.promine.com.br

Project Manager Sun Certified Java Programmer