Rails errore di console: metodo non definito `ogni' per nil: NilClass (NoMethodError)

Question

Qualsiasi tentativo di eseguire rails console nella directory principale della mia applicazione Rails produce il seguente errore:

undefined method `each' for nil:NilClass (NoMethodError)

La traccia completa dello stack:

/Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/railtie.rb:245:in `each_registered_block': undefined method `each' for nil:NilClass (NoMethodError) 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/railtie.rb:224:in `run_console_blocks' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/application.rb:461:in `block in run_console_blocks' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/engine/railties.rb:13:in `each' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/engine/railties.rb:13:in `each' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/application.rb:461:in `run_console_blocks' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/engine.rb:442:in `load_console' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/console.rb:34:in `initialize' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/console_helper.rb:9:in `new' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/console_helper.rb:9:in `start' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/commands_tasks.rb:78:in `console' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/command.rb:20:in `run' 
    from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands.rb:19:in `<top (required)>' 
    from bin/rails:4:in `require' 
    from bin/rails:4:in `<main>' 

ho rintracciato l'errore a questo blocco nel file railtie.rb nella lib Rails:

def each_registered_block(type, &block) 
    klass = self.class 
    while klass.respond_to?(type) 
    # The ':console' type doesn't seem to exist 
    klass.public_send(type).each(&block) 
    klass = klass.superclass 
    end 
end 

che a sua volta deriva da questo blocco:

def run_console_blocks(app) #:nodoc: 
    each_registered_block(:console) { |block| block.call(app) } 
end 

ho disinstallato il spring gemma e installato il rubocop gemma. Altrimenti, il mio Gemfile contiene le gemme predefinite.

versione

mio Ruby è 2.2.3 che è sopra la versione 2.2.2 consigliata per Rails 5.

Rubino versione:2.2.3p173 Rails versione: La versione5.0.0.beta1.1 RVM:1.26.11

Answer 1

L'errore è stato causato dalla gemma web-console come indicato qui: Error when running rails console. web-console era alla versione 3.1.0 al momento in cui questo è stato segnalato. La versione 3.0.0 di web-console sembrava non aver prodotto alcun errore quando è stato eseguito rails console.

È necessario assicurarsi che la versione di web-console sia uguale a 3.1.1 e superiore in quanto il problema è stato risolto nella versione 3.1.1.

Answer 2

È necessario installare gemma di primavera

gem install spring --pre 

Answer 3

gem install spring ha lavorato per me.

Il mio problema era:

/usr/local/bin/NMONMerge.rb:209:in `block in <main>': undefined method `each' for nil:NilClass (NoMethodError) 
from /usr/local/bin/NMONMerge.rb:191:in `each' 
from /usr/local/bin/NMONMerge.rb:191:in `<main>'