Recupero metodo indefinito per falso: FalseClass

Question

Creo un'applicazione semplice per i binari e quando eseguo i binari s. Emette questa pila di errori: -s Ho provato a reinstallare activerecord ma non è stato possibile risolvere il problema. Inoltre, ho provato a usare rvm per rimuovere tutto il gemset e reinstallare ma è sempre lo stesso.

/usr/local/lib/ruby/gems/1.9.1/gems/activerecord-3.2.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:33:in `resolve_string_connection': undefined method `fetch' for false:FalseClass (NoMethodError) 
from /usr/local/lib/ruby/gems/1.9.1/gems/activerecord-3.2.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:23:in `spec' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activerecord-3.2.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:127:in `establish_connection' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activerecord-3.2.3/lib/active_record/railtie.rb:76:in `block (2 levels) in <class:Railtie>' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:26:in `block in on_load' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:25:in `each' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/lazy_load_hooks.rb:25:in `on_load' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activerecord-3.2.3/lib/active_record/railtie.rb:74:in `block in <class:Railtie>' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `instance_exec' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `run' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/initializable.rb:55:in `block in run_initializers' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `each' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `run_initializers' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/application.rb:136:in `initialize!' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing' 
from /home/vic4ever/crowdvn/crowd.vn/config/environment.rb:5:in `<top (required)>' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `block in require' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_dependency' 
from /usr/local/lib/ruby/gems/1.9.1/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require' 
from /home/vic4ever/crowdvn/crowd.vn/config.ru:4:in `block in <main>' 
from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval' 
from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize' 
from /home/vic4ever/crowdvn/crowd.vn/config.ru:1:in `new' 
from /home/vic4ever/crowdvn/crowd.vn/config.ru:1:in `<main>' 
from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval' 
from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file' 
from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:200:in `app' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/commands/server.rb:46:in `app' 
from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app' 
from /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:252:in `start' 
from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/commands/server.rb:70:in `start' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/commands.rb:55:in `block in <top (required)>' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/commands.rb:50:in `tap' 
    from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.3/lib/rails/commands.rb:50:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

Answer 1

È necessario un adattatore databse (ad esempio, config/database.yml).

Suppongo che tu stia utilizzando Git per il controllo del codice sorgente per la tua sicurezza. Ti aiuterà anche a vedere le modifiche che hai apportato quando segui le indicazioni di seguito.

generare una nuova database.yml:

$ cd ~/path/to/my-existing-rails-app 
$ rails new my-existing-rails-app --database=sqlite 

una serie di prompt vi chiederà se si desidera creare/sovrascrivere i file esistenti. Continua a rispondere "NO" ai prompt finché non ne viene visualizzato uno che richiede di creare config/database.yml. Rispondi "SÌ" se vedi il messaggio e continua a rispondere "NO" al resto.

Invece di --database=sqlite, è possibile utilizzare anche --database=postgresql o --database=mysql se sono stati installati nell'ambiente di sviluppo/locale.

ancora di più, ci sono più opzioni per --database=DATABASE

mysql 
oracle 
postgresql 
sqlite3 
frontbase 
ibm_db 
sqlserver 
jdbcmysql 
jdbcsqlite3 
jdbcpostgresql 
jdbc