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Editorial Team
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Asked: 2026-05-29T06:57:23+00:00

Whatever command like rake,rails etc I issue,I get the same error in my rails

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Whatever command like rake,rails etc I issue,I get the same error in my rails app.

Block not supplied (ArgumentError)

C:\Sites\merevik\merevik>rails console
C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1/lib/rails/ra
iltie/configurable.rb:24:in `class_eval': block not supplied (ArgumentError)
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/railtie/configurable.rb:24:in `configure'
        from C:/Sites/merevik/merevik/config/initializers/setup_mail.rb:2:in `bl
ock in <top (required)>'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/railtie/configurable.rb:24:in `class_eval'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/railtie/configurable.rb:24:in `configure'
        from C:/Sites/merevik/merevik/config/initializers/setup_mail.rb:1:in `<t
op (required)>'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:245:in `load'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:245:in `block in load'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:236:in `load_dependency'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:245:in `load'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/engine.rb:588:in `block (2 levels) in <class:Engine>'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/engine.rb:587:in `each'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/engine.rb:587:in `block in <class:Engine>'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/initializable.rb:30:in `instance_exec'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/initializable.rb:30:in `run'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/initializable.rb:55:in `block in run_initializers'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/initializable.rb:54:in `each'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/initializable.rb:54:in `run_initializers'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/application.rb:136:in `initialize!'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/railtie/configurable.rb:30:in `method_missing'
        from C:/Sites/merevik/merevik/config/environment.rb:5:in `<top (required
)>'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:251:in `require'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:251:in `block in require'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:236:in `load_dependency'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activesupport-
3.2.1/lib/active_support/dependencies.rb:251:in `require'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/application.rb:103:in `require_environment!'
        from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.2.1
/lib/rails/commands.rb:40:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'
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1 Answer

  1. Editorial Team

    It appears that you are calling configure from line 2 of setup_mail.rb without passing a block. On line 1, you are also calling configure, and passing the block which contains the faulty call on line 2. I am guessing you are doing something like:

    configure.some_option = 'value'

    where you really meant:

    config.some_option = 'value'

    This is the source for configure:

    def configure(&block)
  class_eval(&block)
end

    Calling class_eval without a block will always throw an ArgumentError.

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